Class / Patent application number | Description | Number of patent applications / Date published |
359495000 | For beam deflection or splitting | 21 |
20080231953 | System and Method for LED Polarization Recycling - Systems and methods for creating high-intensity, polarized light, where one or more embodiments of the present invention use light polarization recycling to allow multiple light sources of the same or different wavelengths to be combined into a single source output where the individual source etendue is equal or substantially similar to the combined source etendue. | 09-25-2008 |
20080273242 | Directional Display Apparatus - A directional display apparatus, comprising a spatial light modulator comprising an array of pixels and a lens array in which each respective section of the lens array is capable of directing light from a group of pixels aligned with the respective section into nominal viewing windows, is arranged such that each respective section is also capable of directing light from at least one adjacent group of pixels aligned with a section adjacent the respective section into the same nominal viewing windows. This may be achieved by a deflection element, such as a prism element or a hologram, or by each respective section of the lens array having at least one lens surface providing: at least one first region capable of directing light from said group of pixels aligned with the respective section into said nominal viewing windows; and at least one second region capable of directing light from said at least one adjacent group of pixels into the same nominal viewing windows. By mixing light from adjacent groups of pixels, striped visual artefacts are reduced. | 11-06-2008 |
20080278813 | Ultraviolet Polarization Beam Splitter with Minimum Apodization - A beamsplitter includes a first fluoride prism and a second fluoride prism. A coating interface is between the first and second fluoride prisms, wherein an overall R(s)*T(p) function of the beamsplitter varies no more than ±2.74% in the range of 40-50 degrees of incidence. | 11-13-2008 |
20090073560 | Systems and Methods for Polarization Mode Dispersion Mitigation - In one exemplary embodiment, a method comprises transmitting an optical signal via the optical line, measuring a relative change in spectral intensity of the optical signal near a clock frequency (or half of that frequency) while varying a polarization of the optical signal between a first state of polarization and a second state of polarization, and using the relative change in spectral intensity of the optical signal to determine and correct the DGD of the optical line. Another method comprises splitting an optical signal traveling through the optical line into a first and second portions having a first and second principal states of polarization of the optical line, converting the first and second portions into a first and second electrical signals, delaying the second electrical signal to create a delayed electrical signal that compensates for a DGD of the optical line, and combining the delayed electrical signal with the first electrical signal to produce a fixed output electrical signal. | 03-19-2009 |
20090073561 | Systems and Methods for Polarization Mode Disperson Mitigation - In one exemplary embodiment, a method comprises transmitting an optical signal via the optical line, measuring a relative change in spectral intensity of the optical signal near a clock frequency (or half of that frequency) while varying a polarization of the optical signal between a first state of polarization and a second state of polarization, and using the relative change in spectral intensity of the optical signal to determine and correct the DGD of the optical line. Another method comprises splitting an optical signal traveling through the optical line into a first and second portions having a first and second principal states of polarization of the optical line, converting the first and second portions into a first and second electrical signals, delaying the second electrical signal to create a delayed electrical signal that compensates for a DGD of the optical line, and combining the delayed electrical signal with the first electrical signal to produce a fixed output electrical signal. | 03-19-2009 |
20090128908 | Polarization Split Element and Production Method Thereof, and Optical Pickup, Optical Device, Optical Isolator and Polarizing Hologram Provided with the Polarization Split Element - A polarization split element | 05-21-2009 |
20090153963 | Light Source Switching Device Adapted for a Projection System - A light source switching device for use in a projection system is provided. The light source switching device comprises at least two light guiding devices and at least one phase switching device. The phase switching device is disposed between the two light guiding devices and adapted to be in one of a first status and a second status. When the first light travels into the light source switching device, the phase switching device is capable of being in the first status such that the first light is adapted to emit out from the outlet surface. When the second light travels into the light source switching device, the phase switching device is capable of being in the second status such that the second light is adapted to emit out from the outlet surface. With the switching operation of the phase switching device, the plural lights provided by plural light sources would be selected and uniformized by the light source switching device. | 06-18-2009 |
20090168174 | Structure of Stereo Optical Engine for Projection - The present invention relates to a stereo optical engine structure for projection, and more particularly, to a stereo optical engine structure for projection for combining two images to project one stereo image. The present invention discloses a stereo optical engine structure for projection, comprising: a first polarization beam splitter | 07-02-2009 |
20090190218 | High power and high brightness diode-laser array for material processing applications - Arrangements for combination and fast-axis alignment of fast-axes of diode-laser beams are disclosed. Alignment arrangements include providing each diode-laser with a corresponding alignable fast-axis collimating lens, providing individually alignable mirrors for steering an re-orienting beams from each diode-laser, and providing single diode-laser slab-modules in which the diode-laser beams can be pre-aligned to a common propagation-axis direction, and in which edges and surfaces of the slabs can be used to align the fast and slow-axes of the beams. Beam combination methods include combination by dichroic elements, polarization-sensitive elements, and optical fiber bundles. | 07-30-2009 |
20090207489 | OPTICAL PROCESSING DEVICE AND OPTICAL PROCESSING METHOD - An optical processing device includes: a light source that outputs second light having a first polarization state or a second polarization state in synchronization with the pulse timing of the pulse of first light; a first nonlinear medium that controls the polarization state of the first light pulse in accordance with the polarization state of the second light pulse, using a nonlinear effect; and a separator that outputs the first light pulse from the first nonlinear medium selectively to a first output path or a second output path in accordance with the polarization state controlled by the first nonlinear medium. In this device, the first nonlinear medium uses the nonlinear effect to compensate the level of each first light pulse output selectively to the first output path or the second output path by the separator, with each first light pulse receiving the energy of the second light pulse. | 08-20-2009 |
20090231704 | EFFICIENT RECAPTURE OF ILLUMINATION BEAM IN AN ACTIVE IMAGING SYSTEM - In accordance with yet another aspect of the present invention, an active imaging system is provided for imaging a target of interest. An imaging assembly includes a light source and an optical assembly comprising a plurality of passive optical components. The optical assembly divides received light into a first beam, having a first polarization and a second beam, having a second, orthogonal polarization, directs the first and second beam along respective first and second optical paths within the optical assembly, and recombines the first and second beams into a combined beam. A sensor detects the combined beam. | 09-17-2009 |
20100002299 | Optical Element, Optical Element Manufacturing Method and Optical Pickup Device - An optical element includes: opposing surfaces each including two areas each of which includes a fine-periodic structure. The fine-periodic structures of the two areas have different directions from each other in each of the opposing surfaces. One of the opposing surfaces with the fine-periodic structures works as a quarter-wave plate and the other of the opposing surfaces with the fine-periodic structures works as a polarization separating element. A boundary of the two areas in one of the opposing surfaces and a boundary of the two areas in the other of the opposing surfaces are positionally identical. | 01-07-2010 |
20100033816 | ADHESIVES INHIBITING FORMATION OF ARTIFACTS IN POLYMER BASED OPTICAL ELEMENTS - Inhibiting formation of optical artifacts in a multi-layer film polarizer of an optical imaging assembly that includes a polarizing beam splitter. The beam splitter may include a multilayer reflective polarizing film having at least two materials, one of which may exhibit birefringence after uniaxial orientation; an adhesive disposed on the multilayer reflective polarizing film; and at least a first prism disposed on the adhesive. The adhesive may include a plasticizer for inhibiting formation of optical artifacts in the polarizing film. | 02-11-2010 |
20100118400 | PROJECTION SYSTEM USING REFLECTIVE POLARIZERS - A projection system comprising a first imaging component, at least a second imaging component, and a color combiner. The first and second imaging components each comprise an imager and a reflective polarizer that is configured to at least partially separate a light beam from the imager into a first portion and second portion, where the first portion and the second portion have substantially orthogonal polarization states. The first portions of the light beams are directed in the same direction above or below a plane defined by the second portions of the light beams. The color combiner is configured to combine the second portions of the light beams, where the second portions of the light beams have substantially orthogonal polarization states prior to entering the color combiner. | 05-13-2010 |
20100238549 | Illumination systems - Described are illumination systems whereby light spectra from multiple LEDs of various colors can be combined and polarized with minimal components, while substantially reducing the losses for the combining and polarizing. The described systems and methods use polarizing beam splitters (PBSs) with retarder stack filters to combine color and split polarization for mixed light beams in one step, and to ultimately align the polarizations of the several colored light beams. | 09-23-2010 |
20100284076 | Wavelength dispersion compensation device - A wavelength dispersion compensation device includes an etalon | 11-11-2010 |
20100302637 | POLARIZATION INSENSITIVE OPTICAL CIRCUIT - The present invention, in one embodiment contemplates a polarization insensitive optical circuit constructed of an input/output signal separator, such as an optical circulator or a 1×2 or 2×2 coupler or N×M coupler, a polarization sensitive operator, and a polarization rotator reflector. In an alternate embodiment, the invention contemplates a polarization insensitive optical circuit comprising a polarization rotator reflector, and a polarization sensitive operator which may comprise for example a first polarization rotator, an operator/coupler, and a polarization beam combiner. Preferably at least one of the components in the optical circuit is constructed integrally from the substrate upon which the optical circuit is based. For example the polarization rotator and/or polarization sensitive operator of the present invention may be monolithic. | 12-02-2010 |
20110002040 | IMAGING APPARATUS WITH LIGHT TRANSMISSIVE FILTER - An imaging apparatus includes a light receiving device array having light receiving devices two-dimensionally arranged in both a row direction and a column direction, and a light transmissive filter disposed in front of the light receiving device array, wherein the light transmissive filter includes plural types of band-shape light transmissive sections having respective, different light transmissive characteristics, and the plural types of band-shape light transmissive sections are arranged in sequence in a width direction thereof. | 01-06-2011 |
20110007392 | LIGHT COMBINER - Light combiners and light splitters, and methods of using light combiners and light splitters are described. In particular, the description relates to light combiners and splitters that combine and split, respectively, light of different wavelength spectrums using polarizing beam splitters. The polarizing beam splitters include a reflective polarizer to efficiently split incident light into transmitted and reflected beams having different polarization directions. Reflectors and quarter-wave retarders are positioned facing selected prism faces of the polarizing beam splitters, to affect the polarization state of light passing through the prism faces. The reflectors can be dichroic filters adapted to reflect light that is outside a selected wavelength range, so that light of different wavelength spectrums can be affected at different prism faces. The surfaces of each polarizing beam splitter can be polished so that the light utilization efficiency is increased due to total internal reflection within the polarizing beam splitter. The light combiners can combine up to five unpolarized different color lights to produce an unpolarized polychromatic light output, which may be white light useful for a projection display. The light splitters can split unpolarized polychromatic light to produce up to five unpolarized different color light outputs. | 01-13-2011 |
20110032613 | OPTICAL ELEMENT AND METHOD OF PRODUCING SAME - Provided is a method of producing an optical element, including: forming a frame portion on a substrate and forming a structural body in a space portion surrounded by the frame portion to thereby form a first optical member; disposing a second optical member on the first optical member in a reduced pressure environment to form an optical element in which the space portion is sealed in a pressure-reduced state; and exposing the optical element to the atmosphere to thereby bring the structural body and the second optical member into close contact with each other by a differential pressure between the atmosphere and the space portion sealed in the pressure-reduced state. Accordingly, it is possible to, when the optical element is bonded, suppress damage to the optical element during the bonding and further improve the function and strength of the optical element without use of an adhesive. | 02-10-2011 |
20110063728 | Delay line interferometers - The specification describes delay line interferometer designs using combinations of basic optical components that are expected to simplify manufacture and reduce costs while still providing precision optical performance. The main operative components of these designs are polarization beam splitters, birefringent crystals, optical delay components, and waveplates. Temperature controllers may be provided for adjusting the delay of the optical delay components. | 03-17-2011 |