Entries |
Document | Title | Date |
20080198466 | Method and apparatus for controlling multiple beam spacing - An anamorphic optical element and an adjustment mechanism for selectively rotating the optical element either around an axis substantially in a vertical direction, an axis substantially in an optical axis direction, an axis substantially in a plane formed by the vertical direction and the optical axis direction, or combination of axes thereof is used to vary a vertical separation between two or more spots. | 08-21-2008 |
20080204879 | Miniature Lamellar Grating Interferometer Based on Silicon Technology - A lamellar grating interferometer is described, in which the light beams are collimated and focused onto the grating by means of mirror | 08-28-2008 |
20080266663 | Optical pulse-width modifier structure - An optical pulse-width modifier structure includes a first diffraction grating and an optically unpowered reversing mirror. An optical path extends between the first diffraction grating and the optically unpowered reversing mirror. A second diffraction grating lies on the optical path between the first diffraction grating and the optically unpowered mirror. A set of optically powered mirrors lies on the optical path between the first diffraction grating and the second diffraction grating. The diffraction gratings and mirrors are positioned such that an input light beam is diffracted from the first diffraction grating, reflected from each of the set of optically powered mirrors, diffracted from the second diffraction grating, reflected from the optically unpowered reversing mirror back to the second diffraction grating, diffracted from the second diffraction grating, reflected from each of the set of optically powered mirrors, and diffracted from the first diffraction grating as an output light beam. The present approach produces a differential path length as a function of wavelength. | 10-30-2008 |
20090015923 | Multi-Spot Ophthalmic Laser Probe - A laser probe includes an emitting optical fiber, optics, and two or more receiving optical fibers. The emitting optical fiber emits a beam of laser light. The optics diffract the beam of light emitted by the emitting optical fiber. The receiving optical fibers each receive a beam of light diffracted by the optics. | 01-15-2009 |
20090021832 | Wideband Diffraction Limited Optical Receiver - Systems and methods are provided for providing wideband diffraction limited performance in an optical receiver. A first lens is constructed from a first material and has a first surface and a second surface. A second lens is constructed from a second material and having a first surface and a second surface. The second lens is positioned such that a first surface of the second lens faces a second surface of the first lens across a gap of air. A diffraction grating is applied to one of the first and second surfaces of the first and second lenses. | 01-22-2009 |
20090034077 | Grating with angled output prism face for providing wavelength-dependent group delay - A method and apparatus for dispersion compensation which provides a specified, well-controlled, wavelength-dependent optical path length in a laser or other optical system. A reflection grism-like device with an angled output interface is designed to simultaneously provide negative GVD and negative TOD, and therefore can be used to compensate for material dispersion. These gratings are very efficient due to their near-Littrow configuration and can be used over a broad spectral range, which is particularly useful in ultra-short-pulse applications. | 02-05-2009 |
20090034078 | OPTICAL IDENTIFICATION ELEMENT HAVING A NON-WAVEGUIDE SUBSTRATE - An optical identification element including a non-waveguide optical substrate. The optical substrate has a volume and includes an inner region surrounded by an outer region. The inner region has an index of refraction that prevents the optical substrate from forming an optical waveguide. The optical substrate includes a diffraction grating within the volume, and the grating provides an output signal indicative of a code when illuminated by an incident light. | 02-05-2009 |
20090040614 | Dispersive Filter - A dispersive filter includes two dispersion systems with an intermediate slit between them. The two dispersion systems have similar but mirror image dispersion characteristics at the plane of the intermediate slit and are configured so that the entrance port of the dispersive filter is polychromatically imaged on the exit port. The intermediate slit passes blocks selected wavelengths and transmits the remaining dispersed wavelengths from the first dispersion system to the second dispersion system. The second dispersion system combines the dispersed beam that passes through the intermediate slit to form an output beam, which is focused on the exit port. In this manner, the radiance of the input radiation is preserved ignoring losses caused by the optical elements and the blocked wavelengths. | 02-12-2009 |
20090040615 | SPECTRALLY ADJUSTABLE FILTER - Spectrally filtering at least one input beam includes: dispersing spectral components of at least one input beam at respective angles in a spectral plane; changing at least some of the angles of the propagation axes of the dispersed spectral components so that a plurality of the spectral components reflect from a single reflective surface; and tilting the reflective surface to select at least one and fewer than all of the received spectral components to be directed to an output spatial mode. | 02-12-2009 |
20090046367 | REFLECTIVE PLATE, DISPLAY HAVING THE SAME, AND METHOD OF CONTROLLING DISTRIBUTION OF REFLECTED LIGHT - Provided are a reflective plate and a display, and a method of controlling a distribution of reflected light. The reflective plate includes a plurality of diffracting grating cells including gratings reflecting incident light, wherein the gratings are arranged at predetermined intervals, and at least one of an arrangement period and an arrangement direction of each of the gratings of the plurality of diffracting grating cells is adjusted to limit a distribution of reflected light. | 02-19-2009 |
20090052039 | OPTICAL DEVICE - An optical device comprises a first optical system, a second optical system, a shading unit, and a diffraction grating. The first optical system transforms incident light to parallel light. The second optical system transforms incident light to parallel light. An optical axis of the second optical system is different from an optical axis of the first optical system. The shading unit has transmission areas having slit forms and shading areas having strip forms. The transmission areas and the shading areas are alternately arranged. The diffraction grating deflects the light transmitted by the transmission areas in a predetermined direction. Part of the incident light through the first optical system passes through the transmission areas, and the rest are shaded by the shading areas. Part of the incident light through the second optical system passes through the transmission areas, and the rest are shaded by the shading areas. | 02-26-2009 |
20090103181 | Processing Method and Processing Apparatus Using Interfered Laser Beams - Provided are a processing method and a processing apparatus which are capable of suppressing a disturbance attributable to a surface wave in a processing by interfered laser beams, in particular, a processing by the interfered laser beams of a pulsed laser having a pulse width of equal to or more than 1 fs and of equal to or less than 1 ps, in which the wavelength of a surface wave that propagates in a direction of the interference of the laser is made longer than a pitch of the interference of the laser on a surface of an object to be processed to process the object. | 04-23-2009 |
20090122407 | Structure and Manufacturing Method of the Same - The present invention may provide a structure capable of obtaining a higher difference in refractive indices between that of a transparent material and that of a cavity, than in the past, and a manufacturing method thereof, and the present invention provides a structure having a transparent material and an internal cavity which is formed by irradiating said transparent material with a pulse laser beam having a pulse width of 10×10 | 05-14-2009 |
20090147361 | MICROREPLICATED FILMS HAVING DIFFRACTIVE FEATURES ON MACRO-SCALE FEATURES - An optical film having a substrate and microreplicated features on a major surface of the substrate. The features include microreplicated macro-scale features and one or more microreplicated diffractive features on the macro-scale features. The films can be made from work pieces machined with tool tips having diffractive features. The tool tip forms both the macro-scale features and diffractive features while machining the work piece. A coating process can then be used to make the optical films from the machined work piece. | 06-11-2009 |
20090153967 | OPTICAL SECURITY DEVICE OFFERING 2D IMAGE - The present invention provides for a diffractive element comprising a diffractive optical microstructure consisting of a modulated structure of a diffractive type which upon illumination by diffused ambient light creates a two-dimensional image to be viewed by an observer upon tilting or rotating the device or by varying lighting direction, wherein the diffractive modulated structure of the device consists of various generally parameterised special optical elements with specifically prescribed groove shapes, wherein each groove shape, position, centre(s), and line thickness, are described by functions describing those dependencies which are variables of the positional coordinate of the optical element. | 06-18-2009 |
20090174944 | A Structural Body, a Method for Forming a Structural Body, an Apparatus for Forming a Structural Body, a Method for Reading a Structural Color and/or Diffraction Light, and a Truth/False Discriminating Method - Decoration of a material is enabled with a high degree of recycling properties while satisfying the requirements for putting a structural color into practical use on the industrial scale. Furthermore, whether an object is genuine or not can be verified easily, and reusing by peeling as in the case of a hologram seal is prevented. | 07-09-2009 |
20090180184 | Stable dielectric gratings implemented by composition striations in paraelectric crystals - Methods for permanently introducing patterns in electro-optic crystals are provided, by forming patterned variations in the composition of the electro-optic crystals [ | 07-16-2009 |
20090180185 | Minute Structure and its Manufacturing Method - A manufacturing method of a minute structure having fine structures on opposing inner surfaces, includes the steps of forming a first pattern in a surface of a first layer, forming a sacrificial layer on the patterned surface of the first layer, forming a second pattern on a surface of the sacrificial layer, forming a second layer on the sacrificial layer and a portion of the surface of the first layer, and removing a member constituting the sacrificial layer. In the step of forming the first pattern on the first layer and the step of forming the second pattern on the sacrificial layer, the patterns are formed using the same alignment marks as references. This manufacturing method can realize highly accurate alignment even when plural lenses or DOEs are used. | 07-16-2009 |
20090180186 | DIFFRACTIVE OPTICAL ELEMENT AND METHOD FOR MANUFACTURING SAME - A diffractive optical element that can maintain transparency and be molded easily, and a method for manufacturing the same are provided. | 07-16-2009 |
20090237795 | Anti-Counterfeit Hologram - A microstructure area ( | 09-24-2009 |
20090279172 | MICROELECTROMECHANICAL LAMELLAR GRATING - An optical instrument includes a grating. The grating includes a plurality of plates that form a single first plane. The instrument further includes a mirror surface positioned adjacent to the grating. The mirror surface is positioned in a second plane. In an embodiment, the mirror surface is made of a substrate, a silicon wafer positioned on the substrate, and a mirror etch pit surface on the silicon wafer. | 11-12-2009 |
20090303598 | Dynamic Optical Grating Device and Associated Method for Modulating Light - A dynamic optical grating device and associated method for modulating light is provided that is capable of controlling the spectral properties and propagation of light without moving mechanical components by the use of a dynamic electric and/or magnetic field. By changing the electric field and/or magnetic field, the index of refraction, the extinction coefficient, the transmittivity, and the reflectivity of the optical grating device may be controlled in order to control the spectral properties of the light reflected or transmitted by the device. | 12-10-2009 |
20100079865 | Near-to-eye scanning display with exit-pupil expansion - The specification and drawings present a new apparatus and method for near-to-eye (e.g., retinal) displaying with exit-pupil expansion using a scanning component (e.g., a scanning mirror) and an exit-pupil expander (e.g., diffractive exit-pupil expander) for providing a retinal scanning display with a large exit pupil. | 04-01-2010 |
20100097704 | Line narrowing module - An apparatus is disclosed which may comprise a grating receiving light, a first prism moveable to coarsely select an angle of incidence of the light on the grating, and a second prism moveable to finely select an angle of incidence of the light on the grating. In one application, the apparatus may be used as a line narrowing module for a laser light source. | 04-22-2010 |
20100149640 | TUNABLE DIFFRACTION GRATING APPARATUS - Provided is a tunable diffraction grating apparatus including: a diffraction grating portion having a diffraction grating with an linearly variable grating interval, the diffraction grating being formed of an elastic member; a drive portion connected to the diffraction grating portion and applying a force to the diffraction grating portion to vary the grating interval; and a controller for controlling the drive portion to adjust the grating interval depending on a specific wavelength input from the exterior. | 06-17-2010 |
20100149641 | Compact Monolithic Dispersion Compensator - An optical signal control system is constructed from a portion of a material and allows for controlled amount of negative dispersion to be generated across a broadband input signal. The block may be made of a single portion of the material and have surfaces with reflective, transmissive, and/or diffractive optical characteristics. By adjusting the physical dimensions of the block substrate and the line pitch of a diffraction grating etched into a surface of the block, the magnitude of the dispersion can be varied. Laser systems that utilize the optical signal control system may have reduced size and weight as compared to existing compressors and be more robust against misalignment. | 06-17-2010 |
20100177387 | END REFLECTOR FOR A FLAT PANEL LENS - End reflectors, flat panel lens that may utilize the end reflector, and methods are provided. The end reflector for a flat panel lens may include a first grating having a first set of parallel planes. The first set of parallel planes may be of layers of alternating refractive indexes disposed at a first angle with a central plane of the flat panel lens. The end reflector may also include a second grating having a second set of parallel planes. The second set of parallel planes may be of layers of alternating refractive indexes of alternating refractive indexes disposed at a second angle with the central plane. The second angle may be equivalent to the first angle reflected about the central plane. | 07-15-2010 |
20100177388 | DIFFRACTIVE OPTICAL RELAY DEVICE WITH IMPROVED COLOR UNIFORMITY - An optical relay comprises a light-transmissive substrate having a plurality of diffractive optical elements, where at least one diffractive optical element is characterized by nonuniform diffraction efficiency. The substrate and diffractive optical elements are designed and constructed to relay at least a portion of a light beam emanating from an object to at least one predetermined eye-box in a manner such that for each point of the object, there is a set of parallel outgoing light rays originating from the point and arriving to the eye-box. The color difference between any two parallel light rays of the set is less than 50 ΔE* units. | 07-15-2010 |
20100214659 | DIFFRACTIVE BEAM EXPANDER AND A VIRTUAL DISPLAY BASED ON A DIFFRACTIVE BEAM EXPANDER - A diffractive beam expander ( | 08-26-2010 |
20100254006 | Diffractive Optical Element and Method of Manufacturing the Same - A diffractive optical element ( | 10-07-2010 |
20100277802 | MICROREPLICATED FILMS HAVING DIFFRACTIVE FEATURES ON MACRO-SCALE FEATURES - An optical film having a substrate and microreplicated features on a major surface of the substrate. The features include microreplicated macro-scale features and one or more microreplicated diffractive features on the macro-scale features. The films can be made from work pieces machined with tool tips having diffractive features. The tool tip forms both the macro-scale features and diffractive features while machining the work piece. A coating process can then be used to make the optical films from the machined work piece. | 11-04-2010 |
20100284083 | OPTICAL PIPE INTENDED FOR PRODUCING AN ELECTRONIC DISPLAY ARRANGEMENT - A light pipe for transmitting light signals from one of its ends, referred to as its inlet surface ( | 11-11-2010 |
20100296162 | Membrane grating for beam steering device and method of fabricating same - A method of fabricating a membrane structure for a diffractive phased array assembly is provided. The method includes the steps of providing a wafer having a body and at least a membrane layer and a backside layer disposed on opposite faces of the body, forming a grating pattern on a surface of the membrane layer, and forming a window through the wafer to expose a back surface of the membrane, thereby allowing light to pass through the membrane. | 11-25-2010 |
20110026119 | METHOD FOR PRODUCING DIFFRACTIVE OPTICAL ELEMENT, AND DIFFRACTIVE OPTICAL ELEMENT - According to a method for producing a diffraction optical element of the present invention, the center of a molding face | 02-03-2011 |
20110069389 | OPTICAL DESIGNS FOR ZERO ORDER REDUCTION - Apparatus for projecting a pattern includes a first diffractive optical element (DOE) configured to diffract an input beam so as to generate a first diffraction pattern on a first region of a surface, the first diffraction pattern including a zero order beam. A second DOE is configured to diffract the zero order beam so as to generate a second diffraction pattern on a second region of the surface such that the first and the second regions together at least partially cover the surface. | 03-24-2011 |
20110075259 | OPTICAL DESIGNS FOR ZERO ORDER REDUCTION - Apparatus for projecting a pattern includes a first diffractive optical element (DOE) configured to diffract an input beam so as to generate a first diffraction pattern on a first region of a surface, the first diffraction pattern including a zero order beam. A second DOE is configured to diffract the zero order beam so as to generate a second diffraction pattern on a second region of the surface such that the first and the second regions together at least partially cover the surface. | 03-31-2011 |
20110122496 | Substrate Used in a Method and Apparatus for Angular-Resolved Spectroscopic Lithography Characterization - A substrate includes an overlay target. The overlay target can include two superposed layers. Each of the two superposed layers includes two gratings with a different pitch from each other. | 05-26-2011 |
20110228395 | APPARATUS FOR ILLUMINATING A RETICLE - An apparatus for illuminating a marking, which is applied on a transparent reticle in the form of a diffraction structure, wherein illuminating beams are injected into the reticle via a side edge surface of the reticle such that they are emitted after diffraction at the marking perpendicular to the plane of the reticle, wherein a concavely curved mirror having two focal points is attached to the side edge surface such that a light source is arranged in the region of the first focal point and the marking is arranged in the region of the second focal point, wherein a second mirror having two focal points is attached such that a second light source with a second emission wavelength is arranged in the first focal point thereof and the marking is arranged in the region of the second focal point of the second mirror. | 09-22-2011 |
20110235178 | DIFFRACTIVE OPTICAL ELEMENT AND OPTICAL DEVICE - A diffractive optical element includes first and second optical members which are stacked. A diffraction grating is formed at an interface between the first and second optical members. A plurality of pores are formed in the second optical member. | 09-29-2011 |
20120026587 | APPARATUS FOR CHANGING DIFFRACTION GRATINGS - An apparatus usable with a laser resonator has a generally stationary base, a positioning slide carried on the guide and shiftable thereon in an adjustment direction, and two (or more) holders carried on the slide and each having a platform adapted to secure a respective diffraction grating. Each of the platforms can be shifted on the respective holder with at least two degrees of freedom relative to the slide. The positioning slide can also be shifted relative to the base for moving each of the gratings into a working positionmak | 02-02-2012 |
20120113517 | STRUCTURAL BODY, A METHOD FOR FORMING A STRUCTURAL BODY AND AN APPARATUS FOR FORMING A STRUCTURAL BODY - Decoration of a material is enabled with a high degree of recycling properties while satisfying the requirements for putting a structural color into practical use on the industrial scale. Furthermore, whether an object is genuine or not can be verified easily, and reusing by peeling as in the case of a hologram seal is prevented. | 05-10-2012 |
20120120493 | OPTICAL WAVEGUIDES - The invention relates to a display device for displaying an image over a field of view. The device comprises: an optical arrangement for directing image bearing light from an image source so that the light has rays at a range of angles relative to an injection axis; and an optical waveguide having an input grating for diffracting into the waveguide said light over said range of angles such that all of the diffracted light is totally internally reflected within the waveguide and so that image bearing light output from the waveguide has a field of view corresponding to said range of angles, wherein the input grating is a surface relief grating having a profiled reflective surface and at least one layer of dielectric material conforming to the surface for diffracting light over said range of angles into the waveguide. | 05-17-2012 |
20120127577 | PLANAR OPTICAL SYSTEM FOR WIDE FIELD-OF-VIEW POLYCHROMATIC IMAGING - A planar optical system for wide field-of-view polychromatic imaging includes a planar waveguide including two plane parallel faces, an entry coupler including a first diffraction grating, and an exit coupler including a second diffraction grating. The diffraction gratings are low line density diffraction gratings that have a pitch greater than the wavelength of use such that the grating is adapted to couple an entry beam having a mean angle of incidence i | 05-24-2012 |
20120162770 | ISOTROPIC OPTICAL FILTER AND METHOD OF MANUFACTURING THEREOF - The present invention discloses an isotropic optical filter comprising high-index refraction material positioned between low-index-refraction matter. At least some of the high-index refraction material has a grated structure and lateral and vertical dimensions with respect to the low-index-refraction matter such that the high-index refraction material is operative to act as a leaky waveguide for light incident on the ZOF. The grated structure comprises at least two different grating patterns. Each of the at least two grating patterns constitutes a subpixel. A plurality of subpixels is operative to diffract incident light to at least two zero-order wavelength spectra respective of the at least two grating patterns such to exhibit an isotropic colour effect with respect to the rotational orientation of the isotropic optical filter. The plurality of subpixels constitute an isotropic pixel | 06-28-2012 |
20120170121 | DIFFRACTION GRATING LENS AND IMAGING DEVICE IN WHICH THE SAME IS USED - A diffraction grating lens according to the present invention is a diffraction grating lens | 07-05-2012 |
20120170122 | Objective Lens Element - An objective lens element which has excellent compatibility with optical discs having different base material thicknesses is provided. An objective lens element | 07-05-2012 |
20120194911 | OPTICAL DEVICES BASED ON DIFFRACTION GRATINGS - Embodiments of the present invention relate to planar optical devices composed of one or more sub-wavelength diffraction grating layers. In one embodiment, an optical device includes a first substantially planar reflective structure ( | 08-02-2012 |
20120206810 | RESIN COMPOSITION FOR COMPOSITE OPTICAL ELEMENT, COMPOSITE OPTICAL ELEMENT, AND IMAGING DEVICE AND OPTICAL RECORDING/REPRODUCING DEVICE EACH EQUIPPED WITH THE COMPOSITE OPTICAL ELEMENT - The present invention provides a resin composition for a composite optical element including: a first (meth)acrylate having a fluorene skeleton; and a second (meth)acrylate having a biphenyl ring but having no hydroxyl group. In the resin composition, the content of the first (meth)acrylate is 4 to 42 wt %. | 08-16-2012 |
20120212820 | OPTICAL DIFFRACTION GRATINGS AND METHODS FOR MANUFACTURING SAME - Described herein are diffraction gratings and methods for the manufacture thereof. One method comprises applying a force to a substrate to strain the substrate, disposing a thin film on at least a portion of the substrate, and reducing the force applied to the substrate, thereby causing the thin film to buckle. | 08-23-2012 |
20120268819 | SECURITY DEVICE AND METHOD OF MANUFACTURING THE SAME - A security device includes at least two lenticular devices, each lenticular device having an array of elongate lenticular focusing elements located above respective sets of image strips, wherein the elongate directions in which the lenticular focussing elements of the two lenticular devices extend are different. | 10-25-2012 |
20130077170 | OPTICAL ELEMENT AND METHOD FOR MANUFACTURING THE SAME - A method for manufacturing an optical element includes the steps of: providing a first material including a precursor of a first energy curable resin which contains fine particles of a transparent conductive material on a transparent substrate, curing the first material by light irradiation, and performing a heat treatment on the cured first material. In the method described above, the cured first material processed by the heat treatment is again processed by light irradiation. | 03-28-2013 |
20130088780 | Light-Guiding Structures - A method and an apparatus for providing a first light-guiding structure and a second light-guiding structure to receive an input optical beam and output an output optical beam to be viewed by a user. At least one of the first or the second light-guiding structure has a non-flat shape. The first and the second light-guiding structures are configured to produce virtual images at different viewing distances. | 04-11-2013 |
20130088781 | DIFFRACTION OPTICAL ELEMENT AND PRODUCTION METHOD THEREFOR - In a diffraction optical element having a structure in which a base and an optical adjustment layer adhere to each other, defects such as cracks and peeling occur in the optical adjustment layer, when the adhesive strength between the base and the optical adjustment layer is degraded. In a diffraction optical element | 04-11-2013 |
20130163086 | SYSTEMS AND METHODS FOR IMPROVING THE PERFORMANCE OF A PHOTOREFRACTIVE DEVICE BY UTILIZING ELECTROLYTES - A photorefractive device ( | 06-27-2013 |
20130170041 | DIFFRACTIVE OPTICAL ELEMENT AND METHOD FOR PRODUCING DIFFRACTIVE OPTICAL ELEMENT - A diffractive optical element disclosed in the present application includes a body | 07-04-2013 |
20130208358 | Method Of Forming An Optical Device By Laser Scanning - A method of forming an optical device in a body ( | 08-15-2013 |
20130271837 | OPTICAL RESIN COMPOSITION AND USE THEREOF - The present disclosure provides an optical resin composition and use thereof. The optical resin composition of the present disclosure comprises unsaturated phenol formaldehyde epoxy acrylate oligomer: 40%-50%, episulfide oligomer: 20%-30%, methacrylate resin: 20%-50%, and multifunctional active acrylate monomer: 2%-5%, which achieves an optimal match with the refractive index of the liquid crystal lens layer, so as to improve the visual effect of the naked-eye 3D/2D switchable birefringent grating under 2D conditions. | 10-17-2013 |
20130286483 | OPTICAL SHUFFLE SYSTEM HAVING A LENS FORMED OF SUB-WAVELENGTH GRATINGS - An optical shuffle system includes a plurality of sources that are to output respective beams of light and a plurality of receivers that are to receive respective beams of light, wherein the plurality of receivers are spaced apart from the plurality of sources. The optical shuffle system further includes an output lens formed of a plurality of output sub-wavelength grating (SWG) sections, wherein each of the plurality of output SWG sections is positioned in a respective output optical path of the plurality of sources, and wherein each of the plurality of output SWG sections is to collimate and direct light received from respective ones of the plurality of sources toward respective ones of the plurality of receivers. | 10-31-2013 |
20130321920 | IMAGING LENS - An imaging lens includes, from the object side to the image side, an aperture stop, a first lens with positive refractive power having a convex object-side surface near an optical axis, a second lens with positive refractive power having a convex image-side surface near the axis, a third lens with positive refractive power having a convex image-side surface near the axis, and a fourth lens with negative refractive power having a concave image-side surface near the axis, wherein all lens surfaces are aspheric, all lenses are made of plastic material, a diffractive optical surface is formed on at least one of the lens surfaces from the first lens image-side surface to the second lens image-side surface, and at least one of the three positive lenses satisfies expression (1): | 12-05-2013 |
20130335825 | Method of Manufacture of X-Ray Diffraction Gratings - Methods and apparatus for manufacturing an optical grating, and the optical grating manufactured thereby. A workpiece is secured to a carriage driven by a linear actuator. A tool is maintained in contact with the workpiece at either a constant force or a constant displacement normal to the surface of the workpiece while the carriage is translated. A plurality of grooves is ruled into the workpiece in this manner. | 12-19-2013 |
20140022642 | OPTICAL ELEMENT AND METHOD OF MANUFACTURING SAME - An optical element | 01-23-2014 |
20140168774 | Generating an Array of Spots on Inclined Surfaces - A system which may be used to generate a plurality of spots on a surface is provided. The spots may be aligned with the incident plane of oblique illumination. The system may include a diffractive optical element configured to split a beam into a plurality of beams by generating a plurality of diffraction orders. The system may also include a focusing lens configured to focus at least some of the plurality of beams on the surface in the plurality of spots. At least some of the plurality of beams may be focused on the surface at an oblique illumination angle. The system may also include an illumination source positioned off-axis relative to an optical axis of the diffractive optical element. Using the system, a plurality of spots may be generated on an inclined surface. | 06-19-2014 |
20140320964 | ANTI-REFLECTING COVERING STRUCTURE WITH A DIFFRACTION GRATING USING RESONANT ELEMENTS - A diffractive device for fitting to a façade of a building, or to any other reflective wall, exposed to electromagnetic radiation emitted by a source located at a distance from the building, the device including a plurality of tubular resonant elements arranged on the façade of the building, where the resonant elements are arranged in a substantially parallel manner on the façade of the building in such a way as to form a diffraction grating and are oriented in a substantially perpendicular direction to the plane defined by the propagation vectors of the incident and reflected electromagnetic waves, each resonant element being configured to form an LC resonator capable of re-radiating a wave corresponding to the incident wave affected by a phase shift; the set of resonant elements being arranged in such a way that the incident wave is diffracted in a preferential direction. | 10-30-2014 |
20140347733 | Systems And Methods of Aberration Correction In Optical Systems - Described herein is a diffraction grating ( | 11-27-2014 |
20150015957 | DIFFRACTION GRATING AND PRODUCTION METHOD THEREOF - The present invention has an object of providing a diffraction grating excellent in surface precision and allowing its miniaturization and weight reduction and a method for manufacturing the same. The present invention comprises: a glass substrate having a thickness of 0.5 mm to 8 mm; a resin-made microstructure body having an unevenness pattern and formed on one surface of the glass substrate; and a flat resin layer formed on the other surface of the glass substrate. Even if the glass substrate has surface precision of λ/2 or greater, the replica of the diffraction grating, in which the microstructure body is not influenced by the surface precision of the glass substrate and which is excellent in surface precision, can be manufactured by the flatness of the resin layer. In addition, since the glass substrate can be made thin, the miniaturization and weight reduction of the diffraction grating can be achieved. | 01-15-2015 |
20150049386 | SPECTRAL BALANCING TECHNIQUE - A spectral instrument including a light source configured to produce a light beam, the light beam comprising a plurality of wavelengths, and the light beam being about collimated or pseudo-collimated. The spectral instrument also includes a spectral dispersion device in optical communication with the light source. The spectral instrument also includes a screen disposed in the optical path after the spectral dispersion device. The screen comprises a material configured to be substantially opaque to at least some of the plurality of wavelengths. The screen is sized and dimensioned to at least partially block selected ones of the plurality of wavelengths. The screen is movable with respect to an axis of the screen. The spectral instrument also includes an imaging lens disposed in the optical path and disposed either after the screen or before the screen. | 02-19-2015 |
20150077853 | Single-Longitudinal Mode Laser with High Resolution Filter - A single longitudinal mode laser in the present invention is described with an external high resolution filter to select a single longitudinal mode as the laser output from a multiple longitudinal mode microchip laser. The high resolution filter comprises at least one grating and a plurality of optical components to disperse the multiple longitudinal modes of the microchip laser and select a single longitudinal mode. The high resolution filter may have a single, double, triple, or quadruple-pass structure, which causes the laser beam to be diffracted by the grating once, twice, three, or four times, respectively, for increased resolution. The grating is configured to have a diffraction angle at the up-limit of 80 to 90 degrees for the single pass structure and to have the near up-limit diffraction angle of 73 to 90 degrees for the double, triple, and quadruple-pass structure. | 03-19-2015 |
20150331160 | SECURITY DEVICE - A security device for improving the security against falsification of articles has a carrier element. Arranged on the upper side of the carrier element are a large number of diffractive surface elements. The surface elements respectively form a number of surface element groups, surface structures of which are made to match one another in such a way that they show a point of the symbol to be represented over an entire observation sphere. By changing the angle of incidence of the light and/or the angle of observation of an observer, a continuous movement of the symbol in the observation sphere is perceived by the observer. | 11-19-2015 |
20150362739 | OPTICAL ALIGNMENT SYSTEMS AND METHODS FOR WAVELENGTH BEAM COMBINING LASER SYSTEMS - In various embodiments, wavelength beam combining laser systems incorporate fast-axis collimation lenses and slow-axis collimation lenses (either separately or as portions of a single hybrid lens) optically upstream of an optical rotation system to thereby reduce or minimize cross-talk in the combined output beam. | 12-17-2015 |
20150370068 | HEAD-UP DISPLAY DEVICE - An HUD device includes a laser scanner that projects laser light carrying a display image, and a screen member that has a plurality of optical elements arrayed in the form of a grating, and diffuses laser light which emanates from the laser scanner and enters the optical elements toward a projection surface. The optical elements have curved surfaces, which take on a convexly curved form as a common curved form, formed as their faces, and diffuse laser light which is emitted to the projection surface from the curved surfaces. A sag quantity from each of surface vertices of the curved surfaces to each of boundaries among the optical elements differs between adjoining optical elements. | 12-24-2015 |
20160023495 | Optically Variable Surface Pattern - An optically variable surface pattern is made available, having at least two partial areas with reflection elements, wherein the reflection elements of the first partial region on the one hand and the reflection elements of the second partial region on the other hand reflect impinging light in different reflection directions. The first partial region is so covered with a first glazing ink layer that a viewer, upon a change of the viewing angle at which the viewer views the optically variable surface pattern, sees the first partial region glow in a first color upon reaching a first viewing angle. The second partial region glows in a second color that is different from the first color upon reaching a second viewing angle. | 01-28-2016 |
20160048028 | WAVELENGTH BEAM COMBINING LASER SYSTEMS UTILIZING LENS ROLL FOR CHIEF RAY FOCUSING - In various embodiments, a wavelength beam combining laser system includes a fast-axis collimation lens that is rotated with respect to a plurality of emitters in order to converge the emitted beams onto a dispersive element and/or reduce the size of the multi-wavelength output beam of the system. | 02-18-2016 |
20160170217 | INTEGRATED SINGLE GRATING COMPRESSOR FOR VARIABLE PULSE-FRONT TILT IN SIMULTANEOUSLY SPATIALLY AND TEMPORALLY FOCUSED SYSTEMS | 06-16-2016 |
20170235031 | MASK INSPECTION APPARATUS AND MASK INSPECTION METHOD | 08-17-2017 |