| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 359570000 | Nonplanar grating substrate (e.g., concave) | 32 |
| 20080225392 | OPTICAL SYSTEM - The invention concerns an optical system. The optical system comprises an input for receiving an optical signal, a predetermined output plane, and a diffraction grating for separating the optical signal received at the input into spectral elements thereof. The grating has a diffraction surface with a first predetermined profile. The first profile is formed by a plurality of points each conducted by different equations. Consequently, each spectral component is focused on the predetermined plane. | 09-18-2008 |
| 20080239492 | SPECTROMETER DESIGNS - Various embodiments include spectrometers comprising diffraction gratings monolithically integrated with other optical elements. These optical elements may include slits and mirrors. The mirrors and gratings may be curved. In one embodiment, the mirrors are concave and the grating is convex. The mirrors and grating may be concentric or nearly concentric. | 10-02-2008 |
| 20080310024 | DIFFRACTION ELEMENT - A diffraction element having concave/convex-like diffraction gratings in its two surfaces from which at least two separated light beams can be taken in the same direction without changing largely the propagating direction of diffracted light even if the temperature of the operating environment changes. A diffraction grating having a concave/convex shape in cross-section is formed in the incoming-side surface of the transparent substrate and two diffraction gratings of concave/convex shape in cross-section are formed in the outgoing-side surface wherein the grating pitch of the first one is made equal to the grating pitch of one of the second ones. | 12-18-2008 |
| 20090021833 | CHROMOMODAL DISPERSION APPARATUS AND METHODS - A system and method to chromomodally generate dispersion in light waves. The system and method may be used to control dispersive effects of an optical element such as a single-mode fiber. A light beam from the optical element is first collimated and then directed on to a spatially diffractive element where it is spatially dispersed into various chromatic frequency components. This frequency-separated light is then imparted onto a dispersion slope equalizer, and then passed into a highly multimode waveguide, where it is further dispersed. The light is then collected and focused back into an outgoing fiber-optic or other optical device. | 01-22-2009 |
| 20090034079 | Fine grating and mold therefore - This invention provides a mold with which a two-dimensional subwavelength grating can be produced with a higher percentage transfer by injection molding and a two-dimensional subwavelength grating having a high aspect ratio produced with such a mold. The mold for a fine grating according to the present invention has protrusion parts ( | 02-05-2009 |
| 20090086322 | Photonic Crystal Devices Using Negative Refraction - Negative refraction in photonic crystals and diffraction grating is used to design plano-concave lenses to focus plane waves. Microwave experiments are carried out to demonstrate negative refraction and the performance of these lenses. Demonstration of negative refraction of visible light is also performed for the grism. These lenses can be used in optical circuits, astronomical applications, etc. | 04-02-2009 |
| 20100027121 | LENS AND METHOD FOR MANUFACTURING THE SAME - A lens according to the present invention includes at least one first area ( | 02-04-2010 |
| 20100110547 | IMAGING DEVICE, AND DIFFRACTION GRATING LENS FOR USE IN THE DEVICE - In a refraction lens having an aspheric shape formed thereon and having a positive power, a diffraction grating is formed on at least one of the faces of the refraction lens. In order to reduce the curvature of field and the chromatic aberration in a well-balanced manner, the zonal pitch of the diffraction grating is constituted so as to satisfy the following conditional expression. | 05-06-2010 |
| 20100142053 | DIFFRACTIVE OPTICAL ELEMENT AND METHOD FOR MANUFACTURING SAME - An element includes a first resin layer and a second resin layer disposed between a first glass lens substrate and a second glass lens substrate, a boundary surface between the first resin layer and the second resin layer having a diffraction grating shape including a plurality of inclined surfaces and wall surfaces. The second resin layer is composed of a fluororesin in which fine metal oxide particles are dispersed. Since a refractive index distribution easily occurs in this material during curing by application of ultraviolet light, by applying ultraviolet light substantially perpendicular to the inclined surfaces of the diffraction grating shape, a refractive index distribution is formed in the thickness direction perpendicularly to the inclined surfaces. | 06-10-2010 |
| 20100165464 | COLOR DIVIDING OPTICAL DEVICE AND IMAGE APPARATUS WITH THE APPLICATION - A color dividing optical device has an integrated structure of dual surfaces, each has a micro/nano structure. The optical device can perform beam splitting and color dividing on an incident light source, which has a constitution from multiple different wavelengths. In a space, the original incident light source is equally split into multiple light beams in an array, according to light intensity. At the same time, the light beam constituted from different wavelengths is divided into multiple sub-light sources, according to the wavelength, so as to have the function to propagate a color array with color dividing. The optical device with capability of modulating the color wavelengths can transform the wide-band incident light source into sub-light beams in array with color dividing (wavelength dividing) and beam splitting. | 07-01-2010 |
| 20100172024 | IMAGE FORMING OPTICAL SYSTEM - To provide a compact image forming optical system in which an incident angle to an imaging plane of a solid-state imaging device is small and whose chromatic aberration, astigmatism, field curvature, and distortion are reduced. An image forming optical system of a first embodiment of the present invention comprises four lenses arranged from the object side to the imaging plane side in order, that are a first lens that is a double-convex lens, a second lens that is a double-concave lens, a third lens that is a positive meniscus lens that is convex toward an image side, and a fourth lens that is a negative meniscus lens that is convex toward an object side. An aperture is placed closer to the object than the image side surface of the first lens. The image forming optical system of the first embodiment of the present invention satisfies the following equations, where f | 07-08-2010 |
| 20100172025 | LENS HAVING PROTECTION FILM AND METHOD FOR MANUFACTURING SUCH LENS - A second region ( | 07-08-2010 |
| 20100202056 | Electronic display assembly - The invention relates to an electronic display arrangement comprising a light pipe ( | 08-12-2010 |
| 20100246006 | DIFFRACTIVE OPTICAL SYSTEM AND OPTICAL DEVICE - A diffractive optical system including a diffractive optical element has a concave lens component having a first diffractive optical surface, and an optical member having a second diffractive optical surface, the concave lens component and the optical member being arranged so that the first diffractive optical surface and the second diffractive optical surface face each other, and the conditional expression 0.003| 09-30-2010 | |
| 20110096400 | DOUBLE IMAGE PICKUP OPTICAL SYSTEM AND IMAGE PICKUP APPARATUS PROVIDED THEREWITH - According to the present invention, a small-sized double-lens imaging optical system whose chromatic aberration is corrected even at a super wide angle of 150° or more can be provided. The double-lens imaging optical system of the present invention includes a concave lens, and a convex lens having a diffraction grating provided thereon, and satisfies the following conditional expression (1): | 04-28-2011 |
| 20110102898 | DIFFRACTIVE LENS AND IMAGE PICKUP DEVICE USING THE SAME - A diffractive lens | 05-05-2011 |
| 20110310486 | PHOTOGRAPHIC OPTICAL SYSTEM AND IMAGE PICKUP APPARATUS INCLUDING THE PHOTOGRAPHIC OPTICAL SYSTEM - A photographic optical system includes, in order from an object side to an image side, a first lens unit, a second lens unit for focusing, and a third lens unit. The first lens unit includes a first lens sub-unit having a positive refractive power and a second lens sub-unit. The first lens unit includes a diffractive optical element and an aspheric surface. A length on an optical axis from a lens surface furthest on the object side of the first lens sub-unit to an image plane, an air space between the first lens sub-unit and the second lens sub-unit, a focal length of the first lens sub-unit, a focal length of the second lens sub-unit, a focal length of the diffractive optical element by only a diffractive component, a focal length and an F-number of the entire photographic optical system are appropriately set to satisfy predetermined conditions for optimal focusing. | 12-22-2011 |
| 20120008210 | DIFFRACTIVE LENS AND IMAGE CAPTURE DEVICE USING THE SAME - The present invention reduces the angle dependence of diffraction efficiency by taking the diffraction pitch and diffraction step of an optical element with a diffraction grating such as a lens into account. Specifically, for that purpose, an optical element that has a first group of diffraction grating portions | 01-12-2012 |
| 20120019912 | Lens - Provided is a lens having a high NA, wherein defects caused when the lens is molded can be eliminated and the laps exhibits a high mountability. A transition surface transferring surface ( | 01-26-2012 |
| 20120075702 | PHASE GRATING - A phase grating includes a substrate and a first dielectric layer. The first dielectric layer is disposed on the substrate and includes a column and a plurality of rings. The top sides of the column and the top sides of the rings align with one another to form a flat plane. The column and the rings are concentric. | 03-29-2012 |
| 20120081790 | OPTICAL SYSTEM INCLUDING DIFFRACTIVE GRATING AND OPTICAL APPARATUS - The optical system includes plural lens groups, a negative lens included in one lens group among the plural lens groups and formed of a first medium, a diffractive grating formed on at least one lens surface of the negative lens and being in contact with a second medium different from the first medium, and a positive lens included in the one lens group and formed of a third medium different from the first medium and the second medium. The first medium satisfies ndA≧1.7 and 40≦νdA≦55 where ndA represents a refractive index of the first medium for a d-line, and νdA represents an Abbe number of the first medium for the d-line. The third medium satisfies ndC≦1.55 and νdC≧60 where ndC represents a refractive index of the third medium for the d-line, and νdC represents an Abbe number of the third medium for the d-line. | 04-05-2012 |
| 20120092769 | DIFFRACTIVE LENS - A diffractive lens according to the present invention has the function of focusing light. The diffractive lens has a side on which a diffraction grating is arranged on either an aspheric surface or a spherical surface in its effective area. The diffraction grating has n | 04-19-2012 |
| 20120182617 | OPTICAL SYSTEM, OPTICAL APPARATUS AND METHOD FOR ARRANGING DIFFRACTIVE OPTICAL ELEMENT - A telephoto lens TL having, in order from an object, a plurality of lenses L | 07-19-2012 |
| 20120182618 | DIFFRACTION GRATING LENS AND IMAGING DEVICE USING SAME - A diffraction grating lens according to the present invention includes a lens body | 07-19-2012 |
| 20120224263 | Optical Systems Utilizing Diffraction Gratings To Remove Undesirable Light From A Field Of View - An optical system has a lens assembly for imaging an object. The lens assembly includes a lens wherein at least a portion of a peripheral part of the lens includes a diffraction grating arranged to divert light arriving on the peripheral part of the lens from an object. The diffraction grating diverts the light away from a focal region, where a central part of the lens focuses light arriving on the central part of the lens from the object, into an image of the object. | 09-06-2012 |
| 20120243096 | DIFFRACTION GRATING LENS AND METHOD OF PRODUCING THE SAME, AND IMAGING DEVICE IN WHICH THE SAME IS USED - A diffraction grating lens according to the present invention includes a lens body and a diffraction grating provided on the surface of the lens body, the diffraction grating including a plurality of annular zones having slopes inclined along a width direction and a plurality of step surfaces respectively located between the plurality of annular zones. At least one of the plurality of annular zones is light-transmissive across its entire area along the width direction, and in the at least one annular zone, a light transmittance near at least one of two ends along the width direction is smaller than a light transmittance near a central portion along the width direction. | 09-27-2012 |
| 20120320461 | DIFFRACTIVE OPTICAL ELEMENT AND METHOD FOR MANUFACTURING SAME - An element includes a first resin layer and a second resin layer disposed between a first glass lens substrate and a second glass lens substrate, a boundary surface between the first resin layer and the second resin layer having a diffraction grating shape including a plurality of inclined surfaces and wall surfaces. The second resin layer is composed of a fluororesin in which fine metal oxide particles are dispersed. Since a refractive index distribution easily occurs in this material during curing by application of ultraviolet light, by applying ultraviolet light substantially perpendicular to the inclined surfaces of the diffraction grating shape, a refractive index distribution is formed in the thickness direction perpendicularly to the inclined surfaces. | 12-20-2012 |
| 20130170042 | OBJECTIVE LENS ELEMENT - An objective lens element having excellent compatibility with optical discs having different base material thicknesses is provided. The objective lens element has optically functional surfaces on an incident side and an exit side. At least either one of the optically functional surfaces on the incident side and the exit side includes a diffraction portion which satisfies at least either one of the following formulas (1) and (2): | 07-04-2013 |
| 20130293961 | Optical System and Reflection Type Diffraction Grating Thereof - An optical system comprising an input member, a predetermined output plane and a reflection type diffraction grating is disclosed. The input member receives an optical signal. The reflection type diffraction grating comprises a grating profile curved surface and a plurality of diffraction structures. The diffraction structures, which separate the optical signal into a plurality of spectral components, are respectively disposed on the grating profile curved surface by a plurality of pitches. At least some pitches are different from each other, so that the spectral components are emitted to the predetermined output plane in a direction substantially perpendicular to the predetermined output plane. The grating profile curved surface is used for focusing the spectral components on the predetermined output plane. | 11-07-2013 |
| 20150293370 | IMAGING LENS - An imaging lens includes, from an object side to an image side: a first positive lens having a convex object-side surface; an aperture stop; a second negative lens as a meniscus double-sided aspheric lens having a concave object-side surface; and a third positive lens as a meniscus double-sided aspheric lens having a concave image-side surface, wherein the second lens has a diffractive optical surface on the object side, the aspheric object-side and image-side surfaces of the third lens have pole-change points off an optical axis, and conditional expressions (1) to (4) below are satisfied: | 10-15-2015 |
| 20160047949 | Systems and Methods for Machining Materials - Embodiments of systems, methods, and computer-readable media for machining materials are disclosed. For example, one embodiment of the present invention includes a method for machining a feature on a work piece along a curving tool path having the steps of controlling a relative translational movement between a tool table and the work piece along the curving tool path and controlling a corresponding angle of rotation of the tool table with respect to the work piece to maintain a substantially constant angle between the tool table and the corresponding relative translational movement between the tool table and the work piece along the curving tool path. In another embodiment, a computer-readable media includes code for a carrying out such a method. | 02-18-2016 |
| 20190146123 | OPTICAL LENS | 05-16-2019 |
