| Entries |
| Document | Title | Date |
|---|
| 20080204836 | HOLOGRAPHIC OPTICAL ELEMENT AND COMPATIBLE OPTICAL PICKUP DEVICE INCLUDING THE SAME - An optical pickup device is compatible with first and second information storage media having different thickness, and includes a light source to emit light; a holographic optical element having holograms in regions to diffract the light into a zero-order diffraction light beam and a first-order diffraction light beam, including a first region to transmit the zero-order diffraction light beam in a straight direction and to diverge the first-order diffraction light beam, a second region to transmit the zero-order diffraction light beam in the straight direction and to converge the first-order diffraction light beam, and a third region to transmit the zero-order diffraction light beam in the straight direction and to converge the first-order diffraction light beam, wherein the zero-order diffraction efficiency of the third region is different from the zero-order diffraction efficiency of the second region; and an objective lens to focus the light to the information storage media. | 08-28-2008 |
| 20080212151 | Rain Sensor, for a Motor Vehicle in Particular, and Method for Producing the Rain Sensor - The invention relates to a rain sensor, especially for a motor vehicle, said sensor comprising an optical waveguide ( | 09-04-2008 |
| 20080225361 | Light Source Device, and Two-Dimensional Image Display Device - There is provided a light source device which can miniaturize a two-dimensional image display device as small as possible. The light source device is provided with three coherent light sources ( | 09-18-2008 |
| 20080231924 | Hologram element, illuminator, and projector - The disclosure is directed to hologram elements, illuminators, and projectors. In one example, a hologram element comprises a relief structure configured to diffract incident light to form a first illumination pattern and a second illumination pattern on an illuminated surface. The second illumination pattern may form a specific mark for uniquely identifying the hologram element. In certain embodiments, the second illumination pattern is formed outside an illumination area. In other embodiments, the second illumination area is formed inside the illumination area. | 09-25-2008 |
| 20080239423 | Method for preparing hologram recording medium - Two adjacent images are recorded in a state smoothly blended at a boundary portion. On a recording plane Rec, provided is a region M | 10-02-2008 |
| 20080239424 | OPTICAL DEVICE AND VIRTUAL IMAGE DISPLAY DEVICE - A virtual image display device is provided which displays a two-dimensional image for viewing a virtual image in a magnified form by a virtual optical system. The virtual image display device includes an optical waveguide ( | 10-02-2008 |
| 20080247014 | DATA SYSTEM FOR STORING HOLOGRAPHIC MEDIA - A master holographic media storing large quantities of holographic media is disclosed. Holographic images may be recorded onto individual Child Plates. A Child Plate may be obtained by culling a portion of a starting or working parent holographic plate with the Child Plate portion comprising all the necessary data required for holographic image reconstruction. A series of plurality of Child Plates are arranged on and compiled to the master holographic media. The resulting information stored on the master holographic media is capable of being displayed as a continuous three-dimensional holographic image. | 10-09-2008 |
| 20080247015 | HOLOGRAM OPTICAL DEVICE, COMPATIBLE OPTICAL PICKUP INCLUDING THE HOLOGRAM OPTICAL DEVICE, AND OPTICAL INFORMATION STORAGE MEDIUM SYSTEM INCLUDING THE COMPATIBLE OPTICAL PICKUP - A hologram optical device, a compatible optical pickup including the hologram optical device, and an optical information storage medium system including the compatible optical pickup are provided. The hologram optical device includes: a first hologram area having a hologram that is asymmetric with respect to an optical axis to diffract an incident light in a 0 | 10-09-2008 |
| 20080247016 | ILLUMINATION DEVICE AND METHOD FOR ILLUMINATING UNIFORMLY AN IMAGE GENERATING MICRO DISPLAY - Illumination device ( | 10-09-2008 |
| 20080285099 | Method and apparatus for forming multi-dimensional colloidal structures using holographic optical tweezers - Holographic optical tweezers are used to position charge stabilized colloidal particles within a flow cell. Once the particles are positioned, fixation is accomplished by pumping an electrolyte solution or pH adjusted solution (or a combination of the two) into the sample cell. In the former, the Debye length is reduced and aggregation caused by the van der Waals attraction takes place. In the latter, the surface charge density of the suspension is reduced and aggregation caused by the van der Waals attraction takes place. This technique can be applied multiple times, and allows for the formation of two and three dimensional structures composed of multi-colloid types to be formed on or away from a substrate. The technique relies upon forces acting on virtually all colloidal dispersions making it applicable to a wide variety of colloid types and compositions, such as formation of photonic crystals, colloidal electronics, and bioengineered materials. | 11-20-2008 |
| 20080309997 | Hologram Screen - The present invention provides a holographic screen having high durability and high diffraction efficiency due to a modulated refractive index structure having a large refractive index change Δn. | 12-18-2008 |
| 20080309998 | Hologram element deflecting optical beam, hologram element fabricating apparatus, hologram element fabricating method, deflection optical unit, and information recording apparatus and information reconstructing apparatus using deflection optical unit - An optical beam emitted from a laser light source is converted by a spatial filter to have a desired beam diameter, and converted by a collimate lens into a collimated beam. The optical beam rendered to be a collimated beam has its intensity adjusted by an ND filter. The optical beam having its intensity adjusted is lead by a mirror to an angle rotation mirror. The angle rotation mirror reflects the optical beam toward a hologram element. Holograms are recorded on the hologram element in advance, so that reconstructed beams are collected at a prescribed position irrespective of an incident position of the optical beam. | 12-18-2008 |
| 20090015890 | Hologram element, hologram element fabricating apparatus, hologram element fabricating method, and hologram reconstructing apparatus used for reconstructing information - A reference beam is deflected by an angularly rotating mirror, and applied to a hologram recording medium at a set incident angle. The relevant applied reference beam and a signal beam are superposed within the hologram recording medium, and light intensity distribution of the resultant interference fringes is recorded as a hologram. The reference beam incident on the hologram recording medium is partially transmitted through the hologram recording medium. The relevant transmitted reference beam passes through a quarter wave plate to be incident on a hologram element. The relevant incident reference beam has its traveling direction changed into a reverse direction by the hologram element regardless of its incident angle, follows the same optical path as the incoming path, and is applied again to the hologram recording medium. | 01-15-2009 |
| 20090027747 | HOLOGRAPHIC MICROSCOPY OF HOLOGRAPHICALLY TRAPPED THREE-DIMENSIONAL STRUCTURES - A method and system for performing three-dimensional holographic microscopy of an optically trapped structure. The method and system use an inverted optical microscope, a laser source which generates a trapping laser beam wherein the laser beam is focused by an objective lens into a plurality of optical traps. The method and system also use a collimated laser at an imaging wavelength to illuminate the structure created by the optical traps. Imaging light scattered by the optically tapped structure forms holograms that are imaged by a video camera and analyzed by optical formalisms to determine light field to reconstruct 3-D images for analysis and evaluation. | 01-29-2009 |
| 20090040578 | Hologram and Its Method of Manufacture - The present invention relates to a holographic display whereby a holographic image may be viewed. Existing holographic optical element (HOE) arrays are typically recorded as a two dimensional array. Each element in the array modulates the intensity of light that is transmitted through or off it. Each HOE in a simple HOE array auto-stereogram performs only one optical function, namely to redirect light to a particular viewing location in space. The process of producing HOE arrays was limited in a number of respects. The invention overcomes these limitations by providing an intensity modulated holographic optical element array, comprising: an holographic optical element ( | 02-12-2009 |
| 20090040579 | Submicron Structures In Dye-Doped Polymer Materials - A nonlinear dye-doped polymer optical rectification detector has an optical input for receiving a modulated optical carrier signal, an optical structure for conveying the modulated optical carrier through the detector, and an electrical structure overlaid with the optical structure arranged to optimize matching between electrical and optical waves and to enhance the second order nonlinearity of polymer in the detector. A planar waveguide fabrication method deposits a thin dye-doped polymer film onto a substrate, photobleaches one or more waveguides into the thin dye-doped polymer film, anneals the one or more waveguides to relieve stresses induced during the photobleaching process, and then forms endfaces by cleaving the substrate. | 02-12-2009 |
| 20090040580 | OPTICAL DEVICE, AND VIRTUAL IMAGE DISPLAY - There is provided an optical device including an optical waveguide upon which a group of parallel light beams different in traveling direction from each other are incident and from which the group of parallel light beams go out after propagated by repeated total reflection through it. The optical waveguide includes a first reflection-type volume hologram grating, and a second reflection-type volume hologram grating. The pitches of interference fringes on the hologram surfaces of the first and second reflection-type volume hologram gratings are equal to each other. In at least the second reflection-type volume hologram grating, the angle formed between the interference fringes and hologram surfaces are varied continuously or stepwise within the hologram in relation to the main incident light beam so as to meet the Bragg condition. Therefore, it is possible to reduce the unevenness of color and brightness due to angles of view. | 02-12-2009 |
| 20090051989 | Sighting device - A sighting device couples a sight mark into a viewing beam path and is especially for a handheld weapon ( | 02-26-2009 |
| 20090086298 | High power optical fiber laser array holographic coupler manufacturing method - A chirped grating is made in a thin film layer or a glass layer for producing a holographic optical element within the layer well suited for use as an optical coupler for coupling side fired laser light into optical fibers for laser light pumping of optical fibers with the grating made in the layer by generating interference fringes burned into the layer with interference fringes created from interfering a reference laser beam with a plurality of convergent laser beams from respective lenses of an array of lenses. | 04-02-2009 |
| 20090091811 | Holographic microscope and a method of holographic microscopy - A holographic microscope comprising a source configured to provide a diverging beam of radiation, a beam splitter configured to direct a first portion of the diverging beam towards an object and a second portion of the diverging beam towards a reflector, the beam splitter being further configured to direct an object beam from the object and a reference beam from the reflector towards a transducer, and the transducer being configured to provide a signal indicative of the interference pattern of the object beam and the reference beam incident on the transducer. A method of digital holography is also disclosed. | 04-09-2009 |
| 20090128873 | LIGHT VALVE ASSEMBLY WITH A HOLOGRAPHIC OPTICAL ELEMENT AND A METHOD OF MAKING THE SAME - A light valve assembly comprises a holographic optical element and a light valve that comprises an array of individually addressable pixels. The light valve assemblies can be fabricated on the die level or on a wafer-level. | 05-21-2009 |
| 20090147332 | DECOUPLED HOLOGRAPHIC FILM AND DIFFUSER - In various embodiments described herein, a display device includes a front illumination device that comprises a light guide disposed forward of an array of display elements, such as an array of interferometric modulators, to distribute light across the array of display elements. The light guide may include a turning film to deliver uniform illumination from a light source to the array of display elements. For many portable display applications, the light guide comprises the substrate used in fabricating the display elements. The display device may include additional films as well. The light guide, for example, may include a diffuser and/or an optical isolation layer to further enhance the optical characteristics of the display. | 06-11-2009 |
| 20090161188 | HOLOGRAPHIC GRATINGS AND METHOD FOR FABRICATING THE SAME - A holographic grating is provided. The holographic grating includes a plurality of first structural areas including acrylic polymer with a first refractive index and a plurality of second structural areas including non-liquid crystal molecules with a second refractive index, wherein the first structural area is adjacent to the second structural area and the second refractive index is higher than the first refractive index. The invention also provides a method for fabricating the holographic grating. | 06-25-2009 |
| 20090207467 | Single Laser Illuminating and Pointing Systems - Dual-function laser systems and methods are disclosed. In one implementation, an apparatus includes a laser source configured to emit a beam; an optical element spaced apart from the laser source; and a diffractive element positioned to diffract the beam to provide a diffracted beam to the optical element such that the optical element refracts the diffracted beam to form an approximately collimated central portion and a diverging outer portion. | 08-20-2009 |
| 20090231651 | SYSTEM FOR APPLYING OPTICAL FORCES FROM PHASE GRADIENTS - A system and method for creating extended optical traps for applying optical forces to a material to be manipulated for a commercial application. The system and method include applying a hologram of appropriate characteristics to a beam of light wherein the hologram characteristics include a transverse optical component to apply optical forces transverse to an optical axis of the system. A shape phase component achieves this transverse optical component and also intensity gradient components can be applied via the hologram to provide programmable extended optical traps for a selectable commercial application. | 09-17-2009 |
| 20090237761 | Direction of Optical Signals by a Movable Diffractive Optical Element - A method and apparatus particularly useful for telecommunications applications, such as switching (Add/Drop), multiplexing and demultiplexing, is disclosed. The method commences by directing a source of input optical signal(s) ( | 09-24-2009 |
| 20090251751 | Optical Imaging System - An illumination device for an optical imaging apparatus, such as a microscope. The illumination of a slide specimen is achieved when divergent light for a point light source or a plurality of point light sources illuminate the specimen converging at high angles at equal brightness across all angles. The user of divergent light cancels the cosine distributed gradient effect (Lambert's cosine law) to effectively create a substantially evenly distribution of light. The placement of diffractive or diffusive film under the specimen causes the light to converge at high angles onto the specimen. The light from the point light source can be further diffused by passing it through a column having its interior coated with a non-diffractive material adapted to widely scatter the light. | 10-08-2009 |
| 20090251752 | DISPLAY DEVICE WITH DIFFRACTIVE OPTICS - Light modulator displays may be illuminated using a light guide comprising diffractive optics that directs light onto the light modulators. The light guide may comprise, for example, a holographic light turning element that turns light propagating within the light guide onto the array of light modulators. In some embodiments, the holographic element has multiple holographic functions. For example, the holographic element may additionally collimate ambient light or diffuse light reflected form the light modulators. | 10-08-2009 |
| 20090268269 | THREE-DIMENSIONAL VIDEO DISPLAY APPARATUS - In a three-dimensional video display apparatus, accommodation and convergence among physiological characteristics of eyes are abandoned, thereby resulting in generation of unnatural three-dimensional video. For example, even when eyes are moved, a screen is not changed, and a cardboard effect and/or a miniature garden effect may be caused, so that the eyes may be greatly fatigued. Light emission sources | 10-29-2009 |
| 20090323144 | ILLUMINATION DEVICE WITH HOLOGRAPHIC LIGHT GUIDE - An illumination device includes a holographic film and a light source, such as a point light source. The point light source is positioned at an edge of the holographic film and has a light emitting face that faces the edge of the holographic film. The holographic film includes a hologram formed of diffractive refractive index structures. The density of the diffractive refractive index structures increases with increasing distance from the light source. Light is propagated from the light source through the holographic film, such as by total internal reflection. The diffractive refractive index structures turn the light, thereby causing the light to propagate out of the holographic film in a desired direction. In some embodiments, the light propagating out of the holographic film has a high uniformity across the surface of the holographic film. | 12-31-2009 |
| 20100014136 | Holographic Projection System Using Micro-Mirrors for Light Modulation - The invention relates to a holographic projection system wherein light modulator means SLM with electromechanically moved micro-mirrors modulate a light wave front LW | 01-21-2010 |
| 20100020374 | HOLOGRAM OPTICAL ELEMENT AND SURFACE LIGHT SOURCE DEVICE USING THE HOLOGRAM OPTICAL ELEMENT - A hologram optical element having a thin form and a high degree of light transmittance, moreover that provides superior handling ease, as well as a surface light source device employing this hologram optical element. The angle at which light can be bent in this hologram optical element, has low wavelength dependency, and the hologram optical element enables prevention of spectral separation in white light incident from an oblique direction which is bent to a vertical direction and emitted. A transmitting diffraction grating, when light of wavelengths λ1, λ2 and λ3 within the ranges 0.46≦λ1≦0.50 μm (blue light), 0.53≦λ2≦0.57 μm (green light), 0.60≦λ3≦0.64 μm (red light) is incident at angle θi, the maximum diffraction angle for diffractive efficiency of each wavelength is within the range from −5 degrees to +5 degrees. | 01-28-2010 |
| 20100027084 | HOLOGRAM OPTICAL ELEMENT AND SURFACE LIGHT SOURCE DEVICE USING THE HOLOGRAM OPTICAL ELEMENT - A hologram optical element having a thin form and a high degree of light transmittance, moreover that provides superior handling ease, as well as a surface light source device employing this hologram optical element. The angle at which light can be bent in this hologram optical element, has low wavelength dependency, and the hologram optical element enables prevention of spectral separation in white light incident from an oblique direction which is bent to a vertical direction and emitted. A transmitting diffraction grating, when light of wavelengths λ | 02-04-2010 |
| 20100027085 | Adjustable Beam Portable Light - A lighting device is disclosed which provides for an adjustable beam. The adjustable beam involves the use of a hologram diffuser with areas that have different diffusing properties. The different diffusing areas are selectively positionable in a light beam created by the lighting device to provide for an adjustable beam by providing different diffusions of the light. | 02-04-2010 |
| 20100053711 | DEVICE FOR SELECTION OF LIGHT IN A REFRACTION ARRANGEMENT - A device for the selection of light of at least one diffraction order comprises a light modulator device comprising a hologram. The light modulator device emits modulated light, where the light comprises one beam which is not deflected by the hologram and at least one diffracted beam. The device comprises at least one controllable angle-selective optical element which selects the light of diffraction orders. | 03-04-2010 |
| 20100097674 | LIGHT SOURCE DEVICE, AND TWO-DIMENSIONAL IMAGE DISPLAY DEVICE - There is provided a light source device which can miniaturize a two-dimensional image display device as small as possible. The light source device is provided with three coherent light sources ( | 04-22-2010 |
| 20100103488 | DISPLAY DEVICE WITH DIFFRACTIVE OPTICS - Light modulator displays may be illuminated using a light guide comprising diffractive optics that directs light onto an array of light modulators. A holographic light turning element may be included with the light guide to turn light propagating within the light guide onto the light modulators. In some embodiments, the holographic element is configured to distribute a substantially uniform amount of light across the array of modulators. The holographic element may, for example, have a turning efficiency that changes along the length of the holographic element. A holographic element can also be used to function as a light bar. Such a holographic element may receive light from a light source such as a light emitting diode and distribute the light along a light guide disposed in front of an array of light modulators. | 04-29-2010 |
| 20100103489 | Optical pulse shaping method and apparatus - The invention disclosed here teaches methods and apparatus for altering the temporal and spatial shape of an optical pulse. The methods correct for the spatial beam deformation caused by the intrinsic DC index gradient in a volume holographic chirped reflective grating (VHCRG). | 04-29-2010 |
| 20100110515 | NOTCH FILTER SYSTEM - A notch filter system, where multiple filter passes of a light signal may be effected for removing a target spectral component from the light signal, is provided. Advantageously, the notch filter system may be tunable. A cascade notch filter system is provided which includes multiple notch filters arranged in a cascade, each of the filters having spectral filtering characteristics and being disposed in the path of the light signal at an appropriate filter angle so that the target spectral component is filtered out of the light signal as the light signal passes therethrough. A multipass notch filter system is provided which includes a notch filter having spectral filtering characteristics, and an optical assembly for directing the light signal for multiple filter passes through the filter at an appropriate angle, so that the target spectral component is filtered out of the light signal as the light signal passes through the filter. | 05-06-2010 |
| 20100110516 | Projection System and Method Including Spatial Light Modulator and Compact Diffractive Optics - A method and apparatus for a projection display system includes a spatial light modulator and a volume illumination hologram. The spatial light modulator comprises a digital micromirror device, and the projection system includes a laser light source to produce a sequence of collimated, colored, light beams for the illumination hologram. Waste light produced by the spatial light modulator is transmitted to the illumination hologram, and the illumination hologram emits waste light from at least one of its edges. Waste light emitted from an edge of the illumination hologram is absorbed by a light sensor to control the intensity of the light beams. A projection focusing element is mounted proximate a side of the illumination hologram to focus the image beam from the spatial light modulator for viewing. A projection hologram is interposed between the side of the illumination hologram and the projection focusing element to manage waste light. | 05-06-2010 |
| 20100157401 | Apparatus and method for reading and apparatus for reading and writing holograms - An apparatus for reading and writing holograms from and to a holographic storage medium is described, which uses an object beam and a reference beam both having a first coherence length and being guided along separate optical branches of an optical setup to be imaged to the holographic storage medium. The apparatus comprises means for reducing the coherence length of the reference beam to a second coherence length for reading out a hologram from the holographic storage medium, wherein the second coherence length is shorter than the first coherence length. | 06-24-2010 |
| 20100214635 | DISPLAY DEVICE, DISPLAY METHOD AND HEAD-UP DISPLAY - A display device, generating light flux containing image information and making the light flux incident to one-eye of an image viewer by controlling an angle of divergence of the light flux is provided. The device includes a first lens, a second lens and an angle of divergence control device provided between the first lens and the second lens, the angle of divergence control device being configured to control the angle of divergence of the light flux. | 08-26-2010 |
| 20100238529 | DITHERED HOLOGRAPHIC FRONTLIGHT - A reflective or transmissive hologram may be used to extract light from a waveguide. The hologram may be formed by separately exposing each of a plurality of areas of a holographic medium with object beams and/or reference beams having attributes (e.g., illumination angles) that vary randomly or pseudorandomly over the entire hologram. The areas may be contiguous (e.g., in a tiled pattern) or overlapping. In some embodiments, the spacing and/or orientation of the diffraction gratings may vary from area to area. For example, the spacing and/or orientation of the diffraction gratings may vary randomly or pseudorandomly from area to area. Some parts of the hologram may intentionally be made relatively more or relatively less efficient at extracting light from the waveguide. | 09-23-2010 |
| 20100238530 | ENDOSCOPIC IMAGING USING REFLECTION HOLOGRAPHIC OPTICAL ELEMENT FOR AUTOSTEREOSCOPIC 3-D VIEWING - Systems and methods for generating a three-dimensionally perceived image from a stereo endoscope by at least one viewer include an autostereoscopic display having a left projector and a right projector that project corresponding left and right images received from corresponding left and right cameras of the stereo endoscope onto a reflective holographic optical element that redirects light from the left projector to a left viewing zone for a left eye and redirects light from the right projector to a right viewing zone for a right eye of a viewer to create a three-dimensionally perceived image without glasses or optical headgear. | 09-23-2010 |
| 20100238531 | LIGHT-COLLECTING DEVICE, LIGHT-COLLECTING DEVICE ARRAY, EXPOSURE DEVICE AND IMAGE-FORMING APPARATUS - A light-collecting device is provided, a light-collecting device, including: a first volume hologram recorded in a hologram recording layer by interference of a first spherical wave and a planar wave, the first spherical wave passing through a light path of diffused light which radiates from a light incident point, passes through the hologram recording layer and spreads to a predetermined diameter; and a second volume hologram recorded in the hologram recording layer by interference of a second spherical wave and the planar wave, the second spherical wave passing through a light path of converging light which radiates from the same side as the first spherical wave, passes through the hologram recording layer and converges at an image-forming point distanced from the hologram recording layer by a predetermined distance, the planar wave intersecting with the first spherical wave and the second spherical wave. | 09-23-2010 |
| 20110019250 | Image displaying apparatus and optical Apparatus - The image displaying apparatus includes an image production apparatus, a first light conduction section and a second light conduction section. The first light conduction section includes a first light conduction plate which propagates part of incident light thereto by total reflection in the inside thereof and emits the propagated light, and a reflection type volume hologram diffraction grating disposed on the first light conduction plate. The second light conduction section includes a second light conduction plate, a first deflection section and a second deflection section. | 01-27-2011 |
| 20110043876 | PROJECTION TYPE IMAGE DISPLAY APPARATUS AND IMAGE DISPLAY METHOD - Parallel coherent light from the laser | 02-24-2011 |
| 20110063701 | Digital optical, planar holography system and method for improving brightness of light beams - The proposed laser-beam system is a compact device of a hybrid or monolithic type, which is based on the use of digital planar holography (DPH) and is capable of coherently combining laser beams emitted from various laser sources. The hybrid DPH beam combiner is fabricated on a separate substrate and is optically coupled with a laser array, while the monolithic combiner is embedded into the laser array planar waveguide. In both configurations, the DPH combiner performs coherent combining and thus preserves a single transverse mode in combined laser beams at a common wavelength. | 03-17-2011 |
| 20110085219 | Holographically Illuminated Imaging Devices - Embodiments of the present invention relate to holographically illuminated imaging devices including a holographic element for transforming an illumination beam into a focal array of light spots, a scanning mechanism for moving an object across one or more light spots in the focal array of light spots, and a light detector for detecting light associated with the focal array of light spots and generating light data associated with the received light. | 04-14-2011 |
| 20110096382 | MULTI-BEAM, HIGH EFFICIENCY DIFFRACTIVE OPTICS SYSTEM FORMED IN A SINGLE SUBSTRATE - An optics system is provided that is made up of a single diffractive optical element that performs beam collimating, beam splitting, and light blocking functions. The diffractive optical element is made up of a substrate having a first surface comprising an entrance facet and a second surface comprising an exit facet. The first surface comprising the entrance facet performs at least the functions of collimating the beam of light produced by the light source and of tilting the collimated beam in a particular direction. The second surface comprising the exit facet performs at least the functions of splitting the tilted collimated beam into at least two collimated light beams and of blocking unintended light (i.e., one or more mode order groups that are not intended to be used for imaging purposes). By performing all of these functions on different surfaces of a single substrate, an extremely compact optics system having very high optical efficiency and a very high signal-to-noise ratio is realized. | 04-28-2011 |
| 20110122468 | Light-enhancing device and method based on use of an optically active lasing medium in combination with digital planar holdgraphy - The light-enhancing system of the invention comprises a laser diode in which a fully reflecting mirror and/or a partially reflecting mirror of the laser diode is made in the form of digital planar holography (DPH) incorporating a mode-reorganization function that decreases divergence and improves brightness of the output beam of the system by suppressing high-order modes and gaining low-order modes, or mode. The holographic elements are made in the form of rectangular grooves that can be manufactured as binary features reproduced by methods of nanolithography or nanoimprinting. | 05-26-2011 |
| 20110122469 | HIGH DISPERSION DIFFRACTION GRATING INCLUDING MULTIPLE HOLOGRAPHIC OPTICAL ELEMENTS - A multi-element diffraction grating is disclosed. The multi-element diffraction grating may be configured to diffract incident radiation with high dispersion using at least two holographic optical elements. The multi-element diffraction grating may include a first volume phase grating that is one of the holographic optical elements. The multi-element diffraction grating may also include at least one additional volume phase grating that is the second holographic optical element. The first volume phase grating and each of the additional volume phase gratings may be positioned relative to each other such that the radiation propagates through and is diffracted by the first volume phase grating and each of the additional volume phase gratings. | 05-26-2011 |
| 20110181929 | LASER PROCESSING DEVICE AND LASER PROCESSING METHOD - A laser processing device | 07-28-2011 |
| 20110194163 | IMAGE DISPLAY DEVICE AND HEAD-MOUNTED DISPLAY - A total reflection surface and a holographic optical element (HOE) surface are formed on the same surface (S | 08-11-2011 |
| 20110205607 | Single Laser Illuminating and Pointing Systems - Dual-function laser systems and methods are disclosed. In one implementation, an apparatus includes a laser source configured to emit a beam; a collimating optical system spaced apart from the laser source; and a diffractive element positioned to diffract the beam to provide a diffracted beam to the collimating optical system such that the collimating optical system refracts the diffracted beam to form an approximately collimated central portion and a diverging outer portion. | 08-25-2011 |
| 20110211239 | OPTICAL DEVICE, AND VIRTUAL IMAGE DISPLAY DEVICE - A virtual image display device which displays a two-dimensional image for viewing a virtual image in a magnified form by a virtual optical system. The virtual image display device includes an optical waveguide to guide, by internal total reflection, parallel pencil groups meeting a condition of internal total reflection, a first reflection volume hologram grating to diffract and reflect the parallel pencil groups incident upon the optical waveguide from outside and traveling in different directions as they are so as to meet the condition of internal total reflection inside the optical waveguide and a second reflection volume hologram grating to project the parallel pencil groups guided by internal total reflection inside the optical waveguide as they are from the optical waveguide by diffraction and reflection thereof so as to depart from the condition of internal total reflection inside the optical waveguide. Some of the parallel pencil groups guided through the optical waveguide being totally reflected different numbers of times for a period from external incidence upon the optical waveguide until outgoing from the optical waveguide. | 09-01-2011 |
| 20110216384 | CORRECTING SPATIAL BEAM DEFORMATION - The invention disclosed here teaches methods and apparatus for altering the temporal and spatial shape of an optical pulse. The methods correct for the spatial beam deformation caused by the intrinsic DC index gradient in a volume holographic chirped reflective grating (VHCRG). The first set of methods involves a mechanical mean of pre-deforming the VHCRG so that the combination of the deflection caused by the DC index gradient is compensated by the mechanical deformation of the VHCRG. The second set of methods involves compensating the angular deflection caused by the DC index gradient by retracing the diffracted beam back onto itself and by re-diffracting from the same VHCRG. Apparatus for temporally stretching, amplifying and temporally compressing light pulses are disclosed that rely on the methods above. | 09-08-2011 |
| 20110228366 | HOE OPTICAL SYSTEM FOR HOLOGRAPHIC SIGHT - An optical system for holographic sights includes a laser diode, two mirrors, a holographic optical element (HOE) and a hologram. The two mirrors direct the diverging laser beam through a folded path to reach certain cross sectional area. The HOE filters, collimates and deflects the beam. Under the illumination of a collimated beam, the hologram projects a virtual reticle image at target plane. The HOE and the hologram are mounted in parallel and have the same period to achieve diffraction match so as to eliminate the image shift. | 09-22-2011 |
| 20110286063 | AGILE OPTICAL PHASED ARRAY DEVICE AND APPLICATIONS - A device that provides light beam switching, agile steering of the light beam over a range of angles, and generation of arbitrary wavefront shapes with high spatial and temporal resolution. The agile device can include a volume diffractive structure comprising Bragg planes having one refractive index and the Bragg planes separated by regions containing an active optical medium. Electrodes (which may be the Bragg planes themselves, or may be arrayed adjacent to the active optical medium) are used to control the electric field intensity and direction across the structure, and thereby control the diffraction efficiency of the structure and the local phase delay imposed on a diffracted wavefront. Means are provided for addressing the many thousands of electrodes required for precise and rapid wavefront control. Applications include free-space atmospheric optical communications, near-eye displays, direct-view 3D displays, optical switching, and a host of other applications. | 11-24-2011 |
| 20120013962 | Two-dimensional surface normal slow-light photonic crystal waveguide optical phased array - Methods and devices for optical beam steering are disclosed including coupling a laser light into an apparatus comprising a first substrate; an array of air core photonic crystal waveguides; columnar members etched around each air core waveguide; a pair of metal electrodes around the columnar members; a trench around the pair of metal electrodes surrounding each air core photonic crystal waveguide; a second substrate coupled to the first substrate comprising electrical interconnection lines; and a holographic fanout array comprising a third substrate; a photopolymer film coated on the third substrate; a hologram written in the photopolymer film configured to couple the laser light into the third substrate; and an array of holograms recorded in the photopolymer film configured to couple a portion of the laser light into the waveguides; and passing a current through the electrodes to induce a refractive index change in the first substrate to control the phase of the portion of the laser light that passes through each waveguide. Other embodiments are described and claimed. | 01-19-2012 |
| 20120013963 | HOLDER FOR A HOLOGRAPHIC GRATING - An adjustable holder ( | 01-19-2012 |
| 20120044553 | PROJECTION TYPE IMAGE DISPLAY APPARATUS AND IMAGE DISPLAY METHOD - Coherent light from laser | 02-23-2012 |
| 20120120467 | HYBRID LIGHT GUIDE WITH FACETED AND HOLOGRAPHIC LIGHT TURNING FEATURES - The present disclosure provides systems, methods and apparatus to illuminate displays. In one aspect, an illumination device with a light guide can include both faceted and holographic light turning features. The holographic light turning features can be provided between the facets. The facets can eject light out of the light guide. The holographic light turning features also can eject light out of the light guide, or can collimate the light so that it propagates more nearly parallel to the major surfaces of the light guide, or both eject and collimate light. The ejected light can be used to illuminate a display. | 05-17-2012 |
| 20120147443 | SOLAR LIGHT CONCENTRATION PLATE - A solar light concentration plate comprises a plurality of holograms diffracting incident light wherein each of the plurality of the holograms has a thickness, at least one intermediate light guide plate disposed between the plurality of the holograms, and a pair of external light guide plates disposed on outer surfaces of outermost holograms of the plurality of the holograms, wherein at least one of the pair of the external light guide plates has an inner surface and an outer surface inclined relative to the inner surface. | 06-14-2012 |
| 20120154881 | HOLOGRAPHIC BRIGHTNESS ENHANCEMENT FILM - This disclosure provides systems, methods and apparatus, including a display device that includes an overlying holographic film. In one aspect, the holographic film includes a hologram that is configured to turn light incident on the film. The light is turned towards the display device at desired angles. The display can be formed of interferometric modulators and the turned light can be reflected off the display, and towards a viewer, to form an image. For light that is incident on the film at angles outside of a view cone, the holographic film is provided with holographic light turning features that turn this light so that it is reflected off the display at angles within a view cone of the display. | 06-21-2012 |
| 20120170090 | Apparatus and method for collimating diffused light using a compound holographic optical element - A collimator can be made of a compound holographic optical element made of three holographic optical elements. The first reflection holographic optical element will have recorded within it continuous lens configured to receive light from a diffuse light beam and diffract the received light as a first collimated light beam. The second reflection holographic optical element will have recorded within it a regular hologram that is configured to permit the light from the diffuse light source to transmit through it to reach the first reflection holographic element, the second reflection holographic element having within it a second holographically reflective structure configured to receive the first collimated light beam and diffract the first collimated light beam as a second collimated light beam. The third transmission holographic optical element is configured to receive the second collimated light beam and diffract it as a third holographic light beam. | 07-05-2012 |
| 20120194886 | SOLAR LIGHT CONCENTRATION PLATE - A solar light concentration plate comprises a first hologram which receives solar light and diffracts incident light in a range of an incident angle, and first and second light guides respectively disposed on both sides of the first hologram, wherein at least one of the first and second light guides has an outer surface substantially inclined to an inner surface of the at least one of the first and second light guides. | 08-02-2012 |
| 20120194887 | HOLOGRAM FABRICATION PROCESS AND FABRICATED HOLOGRAM - A volume hologram recording material is located on the side of a reflection type volume hologram master onto which copying illumination light is incident, and the copying illumination light incident onto the recording material and light diffracted through the master interfere together in the volume hologram recording material thereby copying the reflection type volume hologram master. In this case, a reflecting plate having a fine regular reflection pattern is interleaved between the master and the recording material, and the copying illumination light incident onto the recording material and regularly reflected light from the reflecting plate having the regular reflection pattern interfere together in the recording material thereby allowing the regular reflection pattern to be multi-recorded in a hologram having the reflection type volume hologram master copied in it. | 08-02-2012 |
| 20120200901 | OFF-AXIS INTERFEROMETER - An Interferometer for off-axis digital holographic microscopy includes a recording plane, and a grating located in a plane optically conjugated with the recording plane. The grating defining a first and a second optical path, the optical path corresponding to different diffraction order. | 08-09-2012 |
| 20120243063 | IMAGE DISPLAY DEVICE - An image display device includes an image forming device, collimating optical system, and optical device, with the optical device including a light guide plate, first diffraction grating member and second diffraction grating member which are made up of a volume hologram diffraction grating, and with central light emitted from the pixel of the center of the image forming device and passed through the center of the collimating optical system being input to the light guide plate from the near side of the second diffraction grating member with a certain angle. Thus, the image display device capable of preventing occurrence of color irregularities, despite the simple configuration, can be provided. | 09-27-2012 |
| 20120257266 | TRANSMISSION TYPE OPTICAL ELEMENT AND ANTI-FORGERY VOLUME HOLOGRAM - A transmission type optical element comprising a first hologram having a first surface and a second surfaces and a second hologram having a third surface and a fourth surface. The first surface of the first hologram and the third surface of the second hologram are oppositely arranged. A first light beam having a first wavelength is made to enter the first hologram from the side of the second surface. It is transmitted through the first hologram and exits the first hologram from the side of the first surface. The light beam then enters the second hologram from the side of the third surface. It is diffracted by the second hologram and exits the second hologram from the side of the third surface. The light beam then enters the first hologram from the side of the first surface and is diffracted by the first hologram. | 10-11-2012 |
| 20120262769 | HOLOGRAPHIC SOLAR COUPLER - A method of focusing radiation with an array of lenses, which includes modifying the angles of propagation and convergence and/or divergence with transmission and reflection holographic optical elements, and coupling the radiation into an optical fiber. | 10-18-2012 |
| 20120281263 | OPTICAL SOLENOID BEAMS - Optical solenoid beams, diffractionless solutions of the Helmholtz equation whose diffraction-limited in-plane intensity peak spirals around the optical axis, and whose wavefronts carry an independent helical pitch. The solenoid beams have the noteworthy property of being able to exert forces on illuminated objects that are directed opposite to the direction of the light's propagation. Optical solenoid beams therefore act as true tractor beams that are capable of transporting material back toward their source. | 11-08-2012 |
| 20120307326 | SYSTEM, METHOD AND APPARATUS FOR PHASE CONTRAST ENHANCED MULTIPLEXING OF IMAGES - A volume holographic imaging system, apparatus, and/or method enables the projection of a two-dimensional (2D) slice of a four-dimensional (4D) probing object A 4D probing source object is illuminated to emit or scatter an optical field A holographic element having one or more recorded holograms receives and diffracts the optical field into a diffracted plane beam having spectral information A 4-ftelecentπc relay system includes a pupil filter on the relayed conjugate plane of the volume hologram and images the pupil of the volume hologram onto the front focal plane of the collector lens A collector lens focuses the diffracted plane beam to a 2D slice of the 4D probing source object The focused 2D slice is projected onto a 2D imaging plane The holographic element may have multiple multiplexed holograms that are arranged to diffract light from the corresponding slice of the 4D probing source object. | 12-06-2012 |
| 20120327492 | SYSTEM, METHOD AND APPARATUS FOR CONTRAST ENHANCED MULTIPLEXING OF IMAGES - A volume holographic imaging system, apparatus and/or method enables the projection of a two-dimensional (2D) slice of a four-dimensional (4D) probing object A 4D probing source object is illuminated to emit or scatter an optical field. A holographic element having one or more recorded holograms receives and diffracts the optical field into a diffracted plane beam having spectral information. A 4-f telecentric relay system includes a pupil filter on the relayed conjugate plane of the volume hologram and images the pupil of the volume hologram onto the front focal plane of the collector lens. A collector lens focuses the diffracted plane beam to a 2D slice of the 4D probing source object. The focused 2D slice is projected onto a 2D imaging plane. The holographic element may have multiple multiplexed holograms that are arranged to diffract light from the corresponding slice of the 4D probing source object. | 12-27-2012 |
| 20130016410 | OPTICAL DEVICE FOR AN ILLUMINATION DEVICE OF A 3D DISPLAYAANM Futterer; GeraldAACI DresdenAACO DEAAGP Futterer; Gerald Dresden DE - An optical device for directing illuminating light at a pixel matrix and/or at a controllable spatial light modulator of a display, in particular of a stereoscopic or holographic 3D display comprises a multitude of reflection elements which work according to the principle of a concave mirror and which direct the illuminating light at the pixel matrix and/or at the controllable spatial light modulator of the display, and/or comprises at least one transmission element which is designed in the form of a holographic optical element, in particular in the form of a holographic volume grating, which directs the illuminating light at the pixel matrix and/or at the controllable spatial light modulator of the display. | 01-17-2013 |
| 20130077140 | Optical observation device with at least one visual observation beam path - An optical observation device with at least one visual observation beam path, includes
| 03-28-2013 |
| 20130088763 | ILLUMINATING DEVICE USING COHERENT LIGHT SOURCE - A laser beam generated by a laser light source is reflected by a light beam scanning device, and irradiated onto a hologram recording medium. On the hologram recording medium, an image of a scatter plate is recorded as a hologram by using reference light that converges on a scanning origin. The light beam scanning device bends the laser beam at the scanning origin and irradiates it onto the hologram recording medium. At this time, scanning is carried out by changing the bending mode of the laser beam with time so that the irradiation position of the bent laser beam on the hologram recording medium changes with time. Regardless of the beam irradiation position, diffracted light from the hologram recording medium reproduces the same reproduction image of the scatter plate at the same position. An illumination spot in which speckles are reduced is formed on the light receiving surface of an illuminating object by the reproduction image of the hologram. | 04-11-2013 |
| 20130120815 | VOLUME HOLOGRAM REPLICATOR FOR TRANSMISSION TYPE GRATINGS - A holographic replicator configured to mass-manufacture volumetric transmission holograms and including an imaging tank having a holographic master plate opposing a pneumatic absorber. When a segment of a recording film, moveable with respect to the master plate, is placed between the master plate and the pneumatic absorber, the pneumatic absorber is repositioned in space to locks the segment of the recording film between the master plate and the pneumatic absorber. | 05-16-2013 |
| 20130128326 | LIGHT ABSORBING FILM FOR HOLOGRAPHIC PROCESSING AND METHOD OF USING SAME - A novel light absorbing holographic film for holographic processing is present. The holographic film includes a light absorbing film having a holographic medium disposed thereon. The light absorbing film comprises a substrate and a light absorption layer disposed on a first surface of the substrate. In certain embodiments a second light absorption layer is disposed on a second, opposing surface of the substrate. In other embodiments, a second absorption layer is disposed on top of the first absorption layer. | 05-23-2013 |
| 20130155477 | AUTOSTEREOSCOPIC DISPLAY ASSEMBLY BASED ON DIGITAL SEMIPLANAR HOLOGRAPHY - This invention relates to autostereoscopic display assemblies, in particular for hand-held devices such as tablets, i-Pads, mobile phones, etc., wherein a stereoscopic effect is achieved by forming light beams are emitted from the display at different angles and with different polarization. The display assembly comprises a sandwiched structure consisting of a light-guide panel and a modified liquid-crystal display that is applied onto the light-guide panel. The panel has on its outer surface a net of light waveguides for delivery of light from the light source and for uniform distribution of light over the entire surface of the display. The different polarizations and angular directions of the beams perceived differently by a viewer's left and right eyes are achieved by providing the light-distribution waveguides with holograms of two different types. | 06-20-2013 |
| 20130163059 | Systems, Methods, and Apparatus for a Light Reflector - Certain embodiments of the disclosed technology may include light reflector systems, methods, and apparatus. According to an example embodiment, a light reflector is provided. The light reflector includes a rear reflector that includes a reflective surface. The light reflector includes a lenticular optical film having a smooth surface and a structured surface. The smooth surface of the lenticular optical film is attached or disposed adjacent to the reflective surface. The lenticular optical film is configured for condensing and diffusing light. | 06-27-2013 |
| 20130170005 | PROJECTION DEVICE AND PROJECTION-TYPE VIDEO DISPLAY DEVICE - A projection device includes an optical element including a hologram recording medium where information is multiplexedly recorded in each position so as to allow a coherent light beam to be diffused to a plurality of regions, an irradiation device configured to irradiate the optical element with the coherent light beam so as to allow the coherent light beam to scan the hologram recording medium, spatial light modulators configured to be illuminated with the coherent light beam which is incident from the irradiation device to the hologram recording medium to be diffused to the plurality of regions, and projection optical systems, each projection optical system projecting modulation image obtained on each spatial light modulator on corresponding screen. The coherent light beam, which is incident to each position of the hologram recording medium to be diffused, is illuminated on a plurality of the spatial light modulators. | 07-04-2013 |
| 20130170006 | ILLUMINATION DEVICE, PROJECTION APPARATUS AND PROJECTION-TYPE IMAGE DISPLAY APPARATUS - An illumination device has an optical device and an irradiation unit. The irradiation unit has a light source emitting a coherent light beam, and a scanning device capable of adjusting a reflection angle of the coherent light beam emitted from the light source. The light source has light sources emitting a plurality of coherent light beams having an identical wavelength range, the hologram recording medium has a recording area to be scanned with each of a plurality of coherent light beams reflected by the scanning device, and the recording area has an interference fringe that diffracts an incident coherent light beam. The optical device uses the plurality of coherent light beams diffracted by the interference fringe of the recording area so that each of the coherent light beams diffracted by the hologram recording medium is superimposed on at least one portion to reproduce the image of the reference member. | 07-04-2013 |
| 20130194645 | Advanced Methods of and Apparatus for the Manipulation of Electromagnetic Phenomenon: the Decoding of Genetic Material and the Human Genome (E3) - An advanced method of and apparatus for manipulating electromagnetic spectra, which incorporates a bent tepee or bent pyramidal aligned array of conical or pyramidal inverted sections that have at least two intrinsic angles of differing values aligned co-axially. These are arranged to naturally produce a reference and object waves that impinges on and illuminate a holographic plate or recording means to produce on-axis or in-line transmission and reflection holograms, including real time display. The technology is also applicable to the detection, identification, and/or decoding of genetic material, specifically DNA and the Human Genome. | 08-01-2013 |
| 20130265624 | SURFACE-NORMAL OPTICAL COUPLING USING A HOLOGRAPHIC RECORDING MATERIAL - An integrated circuit includes a holographic recording material substantially filling a cavity in a semiconductor layer. During operation of the integrated circuit, a holographic pattern in the holographic recording is reconstructed and used to diffract an optical signal propagating in a plane of an optical waveguide, which is defined in the semiconductor layer out of the plane through the cavity. In this way, the holographic recording material may be used to couple the optical signal to an optical fiber or another integrated circuit. | 10-10-2013 |
| 20130265625 | AUTOSTEREOSCOPIC 3D DISPLAY - The invention relates to an autostereoscopic 3D display ( | 10-10-2013 |
| 20130286452 | CONTAINER WITH DIFFUSE REFLECTION IN A TRANSITION AREA - The present invention relates to a container comprising a multilayer sheet, the multilayer sheet comprising a substrate layer with an optical element being formed by a reflective microstructure, and a print layer comprising add-on material. The multilayer sheet further comprises a first area, wherein the optical element is provided, and a second area, wherein add-on material is provided and wherein no microstructure is provided, and a transition area between the first area and the second area. The transition area comprises a transition microstructure that is formed in the substrate layer, wherein the transition microstructure provides for a substantial diffuse reflection of light. The invention further relates to a method for production of a multilayer sheet with an optical element. | 10-31-2013 |
| 20130286453 | LASER EMITTING APPARATUS USING A BASIC HOLOGRAM AND A FOCUSING HOLOGRAM - A laser processing apparatus including a laser light source, a phase modulation type spatial light modulator, a driving unit, a control unit, and an imaging optical system. A storage unit that is included in the driving unit stores a plurality of basic holograms corresponding to a plurality of basic processing patterns and a focusing hologram corresponding to a Fresnel lens pattern. The control unit arranges in parallel two or more basic holograms selected from the plurality of basic holograms stored in the storage unit, overlaps the focusing hologram with each of the basic holograms arranged in parallel to form the whole hologram, and presents the formed whole hologram to the spatial light modulator. | 10-31-2013 |
| 20130342885 | DISPERSION COMPENSATION OPTICAL APPARATUS AND SEMICONDUCTOR LASER APPARATUS ASSEMBLY - Disclosed is a dispersion compensation optical apparatus including a first transmission type volume hologram diffraction grating and a second transmission type volume hologram diffraction grating. The first and second transmission type volume hologram diffraction gratings are arranged facing each other. A sum of an incident angle of laser light and an emitting angle of first-order diffracted light is 90° in each of the first and second transmission type volume hologram diffraction gratings. | 12-26-2013 |
| 20140002875 | SPECKLE-REDUCED LASER ILLUMINATION DEVICE | 01-02-2014 |
| 20140002876 | METHOD OF LASER ILLUMINATION WITH REDUCED SPECKLING | 01-02-2014 |
| 20140022616 | LASER DESPECKLER BASED ON ANGULAR DIVERSITY - A device for reducing laser speckle using a micro scanner and a holographic diffuser. The micro scanner includes a first transparent optical substrate with an input surface and an output surface and a second transparent optical substrate with an input surface and an output surface and a variable refractive index medium sandwiched between the output surface of the first substrate and the input surface of the second substrate. Transparent electrodes are applied to the output surface of the first substrate and the input surface of the second substrate. The electrodes are coupled to a voltage generator. The input surface of the first substrate is optically coupled to a laser source. The input surface of the second substrate is configured as an array of prismatic elements. At least one of the input surface of the first substrate or the output surfaces of the second substrate is planar. | 01-23-2014 |
| 20140055830 | PHASE MASK AND HOLOGRAPHIC RECORDING APPARATUS EMPLOYING THE SAME - A phase mask includes a phase modulation layer that modulates a phase of different portions of incident light, differently, such that a different optical phase delay, in a range between 0 and 2π is imparted to different portions of the incident light. A hologram recording apparatus includes a light source; a signal beam optical system that divides a beam emitted from the light source into a reference beam and a signal beam, modulates the signal beam according to hologram pixel information, and radiates the signal beam onto a hologram recording medium. The signal beam optical system includes the phase mask. The hologram recording apparatus also includes a reference beam optical system that radiates the reference beam onto the hologram recording medium. | 02-27-2014 |
| 20140104665 | HOLOGRAPHIC WIDE ANGLE DISPLAY - Provided in one embodiment is an apparatus for displaying an image, comprising: an input image node configured to provide at least a first and a second image modulated lights; and a holographic waveguide device configured to propagate the at least one of the first and second image modulated lights in at least a first direction. The holographic waveguide device comprises: at least a first and second interspersed multiplicities of grating elements disposed in at least one layer, the first and second grating elements having respectively a first and a second prescriptions. The first and second multiplicity of grating elements are configured to deflect respectively the first and second image modulated lights out of the at least one layer into respectively a first and a second multiplicities of output rays forming respectively a first and second FOV tiles. | 04-17-2014 |
| 20140177018 | PROJECTION-TYPE FOOTAGE DISPLAY DEVICE - A laser beam (L | 06-26-2014 |
| 20140198362 | PROJECTION SYSTEM - A projection system includes at least one projector and a holographic projection film. The projector projects a first image to a projection surface. The holographic projection film mirrors the first image on the projection surface to form a second image on an imaging surface. The projection surface and a standard surface define a first angle therebetween. The first angle is Y degrees. The holographic projection film and the standard surface define a second angle therebetween. The second angle is 45+X degrees. Y and X substantially satisfy: Y=2X. | 07-17-2014 |
| 20140218779 | IMAGE DISPLAY DEVICE - An image display device includes an image forming device, collimating optical system, and optical device, with the optical device including a light guide plate, first diffraction grating member and second diffraction grating member which are made up of a volume hologram diffraction grating, and with central light emitted from the pixel of the center of the image forming device and passed through the center of the collimating optical system being input to the light guide plate from the near side of the second diffraction grating member with a certain angle. Thus, the image display device capable of preventing occurrence of color irregularities, despite the simple configuration, can be provided. | 08-07-2014 |
| 20140253989 | PROJECTION APPARATUS - A projection apparatus has an optical device capable of diffusing coherent light beams, an irradiation unit to irradiate coherent light beams to the optical device so that the coherent light beams scan the optical device, a light modulator to generate a modulated image using coherent light beams incident on and diffused at respective points of the optical device from the irradiation unit, and a projection optical system to project a modulated image generated by the light modulator onto a scattering plane. The light modulator has a plurality of micromirrors provided for each pixel, to switch a reflection angle of each coherent light beam from the optical device, and a reflection angle controller to control a timing of switching a reflection angle of each of the plurality of micromirrors so that the timing becomes irregular for each frame period that is a time unit for generating the modulated image. | 09-11-2014 |
| 20140293389 | OPTICAL DEVICE AND VIRTUAL IMAGE DISPLAY - An optical device includes: a light guide plate receiving, for each of N types of wavelength bands, a plurality of parallel light beams with different incident angles each corresponding to view angles, and guiding the received parallel light beams; a first and a second volume hologram gratings of reflection type having a diffraction configuration which includes N types of interference fringes each corresponding to the N types of wavelength bands, and diffracting/reflecting the parallel light beams. The optical device satisfies for each wavelength band, a relationship of ‘P>L’, where ‘L’ represents a central diffraction wavelength in the first and second volume hologram gratings, defined for a parallel light beam corresponding to a central view angle, and ‘P’ represents a peak wavelength of the parallel light beams. | 10-02-2014 |
| 20140347715 | ILLUMINATING METHOD USING COHERENT LIGHT SOURCE - A laser beam (L | 11-27-2014 |
| 20150049372 | Free-Space Dynamic Diffractive Projection Apparatus - A free-space dynamic diffractive projection apparatus comprises a laser light source element, a dynamic diffractive element, a control element, and a signal output element. Based on a pattern signal outputted from the signal output element, the control element controls the laser light source element to emit a color beam, and controls the dynamic diffractive element to perform real-time signal modulation so as to generate different dynamic diffractive grating distributions in a specific period. Accordingly, the color beam passes through the dynamic diffractive element to produce the pixels defined by the pattern signal in a specific space. The control element controls the dynamic diffracting element to be quickly switched to display each pixel, so that each pixel is projected on a corresponding position in a specific space to form a two-dimensional geometric image. | 02-19-2015 |
| 20150116801 | SINGLE LONGITUDINAL MODE DIODE LASER MODULE WITH EXTERNAL RESONATOR - A single longitudinal mode diode laser module including a laser diode ( | 04-30-2015 |
| 20150124303 | SUBSTRATE-GUIDED WAVE-BASED TRANSPARENT HOLOGRAPHIC CENTER HIGH MOUNTED STOP LIGHT AND METHOD OF FABRICATION THEREOF - Multiple pairs of substrate-guided wave-based holograms (SGWHs) are laminated to a common thin substrate to form a transparent substrate-guided wave-based holographic CHMSL (SGWHC) that diffracts playback LED illumination over a wide angular range. This device is made pursuant to a technique that includes the steps of recording a first set of SGWHs with one setup, that upon playback, will couple and guide the diffracted light inside the substrate, and a second set of SGWHs recorded with another setup, that will diffract and couple the guided light out. | 05-07-2015 |
| 20150309326 | ANTI-SPECKLE SYSTEM FOR COHERENT ILLUMINATION SYSTEM - This invention in phase homogenization of coherent light from illuminators used for surveillance imaging systems provides a coherent light emitter aligned with a light source ray path along an optical axis with at least two separated microdiffractive diffusers, the microdiffractive diffusers comprising holographically generated surfaces of microdiffractive structure that statistically tend to diffract light at selectable angles or distribution patterns, the microdiffractive diffusers disposed upon a substrate and separated from each other by a distance determined by wavelength phase and irradiance characteristics of the coherent light emitter and by refractive characteristics of at least two microdiffractive diffusers, followed by a homogenized exit ray path in order to produce a diffused pattern of illumination optimized for long distance surveillance imaging. | 10-29-2015 |
| 20150346685 | DEVICE FOR GENERATING PATTERNED LIGHT INTERFERENCE - A patterned light interference generating device | 12-03-2015 |
| 20150369985 | An Optical Waveguide Comprising A Core Region With Integrated Hologram - An optical waveguide comprising an axial direction and a cross-section perpendicular to said axial direction is shown. The optical waveguide comprises a core region. The core region includes an integrally formed hologram, which extends along a first axial segment of the optical waveguide, the first axial segment having a first axial length. The hologram, seen in the cross-section, includes a micro-structure with written elements having a modified refractive index different from areas of the core region with an unmodified refractive index. | 12-24-2015 |
| 20150378241 | PLANAR BEAM FORMING AND STEERING OPTICAL PHASED ARRAY CHIP AND METHOD OF USING SAME - A one-dimensional planar beam forming and steering optical phased array chip is a simple building block of a two-dimensional beam forming and steering solid-state lidar, enabling manufacturing of said lidars at high yield and low cost through the use of a plurality of said chips. Innovative photonic integrated circuit chip architectures that follow design for manufacturing rules enable said building blocks. | 12-31-2015 |
| 20160003996 | INTEGRATED FILTER AND GRATING IN AN AIMING SIGHT - A holographic sight is provided having a housing that includes a plurality of holograph sight components. A laser diode mounted in the housing is configured to emit a laser light beam. The light beam is transmitted to an integrated diffraction grating and filter unit which includes a grating and a filter in a single device. The diffraction grating has a grating surface for diffracting the light beam and also diffracting unwanted ambient light transmitted into the housing. The filter is an optical filter contacting at least a portion of the grating. The optical filter is adapted to absorb at least one wavelength of the ambient light to inhibit the ambient light from diffracting into a visible spectrum that might otherwise be viewable to a user looking into the holographic sight. | 01-07-2016 |
| 20160004139 | TUNABLE NONLINEAR BEAM SHAPING BY A NON-COLLINEAR INTERACTION - A method and system for beam shaping employing a non-collinear quasi phase-matched interaction in a crystal whose nonlinear coefficient was encoded by a computer generated hologram is provided herein. The same axis is used for both satisfying the phase-matching requirements and encoding the holographic information. This allows one-dimensional beam shaping using a very simple to fabricate nonlinear crystal pattern and two-dimensional beam shaping with high conversion efficiency. Both are demonstrated by converting a fundamental Gaussian beam into Hermite-Gaussian and Laguerre-Gaussian beams at the second harmonic in KTiOPO | 01-07-2016 |
| 20160011353 | POLARIZATION CONVERSION SYSTEMS WITH GEOMETRIC PHASE HOLOGRAMS | 01-14-2016 |
| 20160041323 | LIGHT EXTRACTING DIFFUSIVE HOLOGRAM FOR DISPLAY ILLUMINATION - This disclosure provides systems, methods and apparatus for illumination, such as for illuminating displays, including reflective displays. An illumination device may include a light-extracting, diffusive holographic medium. The holographic medium may be a holographic film and may be disposed on the surface of a light guide, and includes a hologram that both extracts light out of the light guide and diffuses this extracted light for propagation towards the display elements of the display. The hologram can extract light by redirecting light, which is propagating within the light guide, so that the light propagates out of the light. The diffusion occurs upon the light being redirected, as the hologram redirects the light towards the light guide in a controlled range of angles. | 02-11-2016 |
| 20160041522 | DISPLAY DEVICE FOR HOLOGRAPHIC IMAGES FOR SMALL AND MEDIUM SIZED MEDIA DEVICES - A holographic image viewer for small and medium-sized media devices whose inventive concept lies in its portability, providing viewing of holographic moving images (the 3-D ones according to the incidence of light on the image) generated by any type of video player such as a smartphone, tablet, notebook, LED and LCD monitor. It provides complementary protection for these mobile devices and, as the main property of said device is its portability, it can be used individually and relies on low cost manufacturing technology. | 02-11-2016 |
| 20160041525 | HOLOGRAPHIC MEMORY DEVICE - To reduce an influence of stray light and stably record/reproduce high-quality data in holographic recording/reproduction. A holographic memory device includes an optical system that guides a reference beam to an optical information recording medium at a desired angle of incidence, a control part that controls the angle of incidence of the reference beam generated in the optical system, and a lens part that images the reference beam in a desired position of the optical information recording medium. Further, at least a first light beam at a first angle and a second light beam at a second angle different from the first angle are output from the optical element, and the optical element is provided so that the first light beam may propagate within an effective diameter of the lens part and the second light beam may propagate to an outside of the effective diameter of the lens part. | 02-11-2016 |
| 20160048010 | STRUCTURED STANDING WAVE MICROSCOPE - Described herein is a method and apparatus that may be used in various applications, such as medical diagnosis and conducting research. In one embodiment, the subject matter extends upon the principle of standing wave microscopy by improving the resolution of subject specimen images in all three dimensions, thus achieving near isotropic resolution improvement that allows full three dimensional imaging of the subject specimen beyond the optical resolution limits of the objective lens and without the complexity and cost associated with 4 | 02-18-2016 |
| 20160077353 | Method of Laser Illumination with Reduced Speckling - Proposed is a method of laser illumination with reduced speckling for in optical microscopy, machine vision systems with laser illumination, fine optical metrology, etc. The method comprises forming a net of planar ridge waveguides into an arbitrary configuration and providing them with a plurality of holograms having holographic elements formed into a predetermined organization defined by the shape of a given light spot or light field which is to be formed by light beams emitted from the holograms on the surface of the object or in a space at a distance from the planar ridge waveguide. Speckling is reduced by locating at least a part or all of the holograms at distances from each other that are equal to or greater than the coherence length. The geometry and organization of the holographic elements allows controlling position, focusing and defocusing of the beam. | 03-17-2016 |
| 20160161735 | MODULAR HOLOGRAPHIC SIGHTING SYSTEM - A lightweight holographic sighting system is provided that is designed to minimize optical aberrations common with earlier holographic sighting systems. The system has a modular construction that is more economic and conducive to high volume production, in terms of complexity of required fixturing and availability of materials, than earlier systems. The system is lighter and more compact, while providing a larger field of view than existing systems, and can be used on small hand guns, standard size firearms, bows, telescopes, and other devices without adding significant weight or space constraints. The system utilizes an upper housing assembly containing a high efficiency holographic optical element, an anti-reflective glass viewing window, and a red diode laser light source driven by a high efficiency microcontroller circuit designed for increased battery life, and a lower housing assembly containing two dielectric folding mirrors, an on-axis collimating lens, and a high efficiency achromatizing holographic optical element. | 06-09-2016 |
| 20160178920 | PROJECTION DEVICE AND PROJECTION-TYPE VIDEO DISPLAY DEVICE | 06-23-2016 |
