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| Number | Title | Issue Date |
| 8054550 | Optical device, laminate and labeled article A special visual effect is achieved. An optical device includes a light-reflecting interface provided with a first relief structure including first recesses or protrusions arranged two-dimensionally, the first relief structure emitting a first diffracted light when ... | 11/08/2011 |
| 7940458 | Laser light source device, hologram apparatus, and method for detecting laser light A laser light source device may include a laser diode, first and second optical elements, a diffraction grating, and a detector. The first optical element may collimate laser light emitted from the laser diode. The diffraction grating may reflect zero-order light in... | 05/10/2011 |
| 7595931 | Grating for EUV lithographic system aberration measurement A grating includes an absorptive substrate and a plurality of reflective lines on the absorptive substrate. Each reflective line is formed by a plurality of reflective areas. The reflective areas can be arranged in a regular pattern. The reflective areas are between... | 09/29/2009 |
| 7589895 | Polarizing element and optical system including polarizing element A polarizing element usable for two wavelengths in a predetermined wavelength region and having a simple structure. The polarizing element has a two-layer structure in which a grid pattern of a constant period Λ having a triangular cross-section is formed on a subs... | 09/15/2009 |
| 7589896 | 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 ... | 09/15/2009 |
| 7557990 | Method and apparatus for a Bragg grating tunable filter The present invention relates to tunable filters. More specifically, the present invention pertains to a method and apparatus that allows tuning of a wavelength over a large optical band. The disclosed system and method allows an arbitrary wavelength selection of an... | 07/07/2009 |
| 7453644 | Grating for EUV lithographic system aberration measurement A grating includes an absorptive substrate and a plurality of reflective lines on the absorptive substrate. Each reflective line is formed by a plurality of reflective areas. The reflective areas can be arranged in a regular pattern. The reflective areas are between... | 11/18/2008 |
| 7424182 | Wavelength selection switch A wavelength selection switch includes a diffraction grating that spectrally separates entering light, a focusing optical system that receives the light spectrally separated by the diffraction grating and focuses the light at a predetermined position, a deflection m... | 09/09/2008 |
| 7420720 | Optical element and method for the production thereof A method for producing an optical element, preferably a security feature, wherein a film having a first embossed hologram in an embossing layer is provided, and a second embossed hologram is embossed into the same embossing layer such that the first embossed hologra... | 09/02/2008 |
| 7379241 | High efficiency phase grating having a planar reflector An apparatus for processing electromagnetic radiation. The apparatus comprises a dielectric reflector, a plurality of ridges disposed on the dielectric reflector and a plurality of grooves disposed intermediate adjacent ridges to form a diffraction grating. Each of ... | 05/27/2008 |
| 7376305 | Echelle gratings with low Polarization Dependent Loss (PDL) using metal coating on the reflecting facets only An Echelle grating has alternate first (1a) and second (1b) sets of facets (1). The first set of facets (1a) is operative to reflect incident light (4) for diffraction and the second set of facets (1b... | 05/20/2008 |
| 7372607 | Apparatus for reducing drops in a transmission spectrum due to inter-pixel gaps The invention includes an apparatus for modulating an optical signal. The apparatus includes a spatial dispersion mechanism and a modulating mechanism. The spatial dispersion mechanism spatially disperses the optical signal. The spatially dispersed optical signal ha... | 05/13/2008 |
| 7362493 | Micromirror and post arrangements on substrates A micromirror of a micromirror array of a spatial light modulator used in display systems comprises a mirror plate attached to a hinge that is supported by two posts formed on a substrate. Also the mirror plate is operable to rotate along a rotation axis that is par... | 04/22/2008 |
| 7352783 | Tunable fiber laser light source A loop is formed with an optical fiber by providing a gain medium having a gain with respect to an oscillation wavelength. Light retrieved by the optical circulator 13 from the optical fiber loop is enlarged and projected to a mirror 23. A diffraction ... | 04/01/2008 |
| 7342659 | Cross-dispersed spectrometer in a spectral domain optical coherence tomography system A spectral-domain optical coherence tomography system using a cross-dispersed spectrometer is disclosed. The interfered optical signal is dispersed by a grating into several orders of diffraction, and these orders of diffraction are separated by an additional disper... | 03/11/2008 |
| 7339714 | Variable blazed grating based signal processing A light processing system includes an array of optical signal processing devices. The array of processing devices are operable to receive at least some of a first signal part and to modulate the first signal part based at least in part on a control signal received f... | 03/04/2008 |
| 7336878 | Optical device The invention has an object to provide an optical device which can directly and efficiently introduce a planar incident light as it is and can efficiently obtain a planar total reflected light on a desirable interface without using a light guiding plate or an optica... | 02/26/2008 |
| 7333522 | Polarization control of vertical diode lasers by monolithically integrated surface grating There is provided a laser. The laser includes a substrate, a first Bragg reflector layer sequence on the substrate, an active layer sequence on the first Bragg reflector layer sequence, a second Bragg reflector layer sequence on the active layer sequence, and a volt... | 02/19/2008 |
| 7333127 | Image recording apparatus and image recording method using diffraction grating type light modulator In an image recording apparatus for recording an image by guiding zeroth order diffracted light beams from a plurality of diffraction grating type light modulator elements as signal beams to a recording medium, a transition of each of light modulator elements from a... | 02/19/2008 |
| 7330293 | Optical scanning unit An optical scanning unit designed to provide a sufficient optical path length between a light source and an exposed object while reducing the overall space it occupies. The optical scanning unit may include a light source that produces and emits at least one beam, a... | 02/12/2008 |
| 7324195 | Planar waveguide based grating device and spectrometer for species-specific wavelength detection Planar waveguide based grating devices and spectrometers, for species-specific wavelength detection for example, are disclosed. A planar waveguide spectrometer apparatus may have a microfluidic channel or compartment microfabricated integrally with a planar waveguid... | 01/29/2008 |
| 7319553 | Optical modulator module package structure Disclosed herein is an optical modulator module package structure. In the optical modulator module package structure, an optical modulator device and a drive integrated circuit device are flip-chip bonded to a substrate, and an opening of the substrate is blocked us... | 01/15/2008 |
| 7317676 | Optical head device and optical information apparatus using this optical head device, and computer, optical disk player, car navigation system, optical disk recorder and optical disk server using this optical information apparatus Providing an objective lens with a large numerical aperture (NA), the present invention records or plays conventional optical disks such as CDs and DVDs at high light usage efficiency, using an optical head capable of recording or reproducing high-density optical di... | 01/08/2008 |
| 7315419 | Dispersive element, diffraction grating, color display device, demultiplexer, and diffraction grating manufacture In a transmission grating as a dispersive element, diffraction efficiency is enhanced and manufacturing costs are considerably reduced. A dispersive element includes resin members for forming a diffraction grating, being composed of a plurality of diffraction gratin... | 01/01/2008 |
| 7312878 | Method for manufacturing a scale, a scale manufactured according to the method and a position measuring device In a method for producing a scale in the form of a phase grating, the scale itself, and a position measuring device including the scale, the scale includes two reflection layers located at a distance from one another on either side of a spacer layer. The production ... | 12/25/2007 |
| 7304797 | Inputs and outputs for an optical multiplexer/demultiplexer utilizing the grating facet diffraction envelope The invention relates to a planar waveguide reflective diffraction grating for use in an optical device, such as a wavelength division multiplexer, providing an increased bandwidth over conventional planar waveguide reflection diffraction gratings while eliminating ... | 12/04/2007 |
| 7295054 | Buffer capable of controlling slew rate in drive IC The present invention relates generally to a buffer of a drive Integrated Circuit (IC) and, more particularly, to a buffer of a drive IC for driving a spatial light modulator that can meet a desired dynamic slew rate characteristic by controlling current that affect... | 11/13/2007 |
| 7289258 | Light modulator having variable blaze diffraction grating The present invention relates, in general, to a light modulator having a variable blaze diffraction grating and, more particularly, to a light modulator having a variable blaze diffraction grating, in which a diffraction member rotates due to piezoelectric force so ... | 10/30/2007 |
| 7286764 | Reconfigurable modulator-based optical add-and-drop multiplexer An optical add and drop multiplexer system comprising a first module for providing a first signal; a second module for providing a second signal; and a modulator for receiving a channel of the first signal at a first location, the first location configured to actuat... | 10/23/2007 |
| 7286292 | Configurable diffractive optical element This invention relates to a configurable diffractive optical element comprising an array of diffractive sub-elements having a reflective surface, wherein each sub-element has a controllable position with a chosen range, and in which a number of sub-elements are prov... | 10/23/2007 |
| 7274500 | Display system incorporating trilinear electromechanical grating device A display system comprises a light modulator having at least three linear arrays of light modulating devices on a common substrate, at least one light source producing at least three colors of light for illuminating the at least three linear arrays, a lens for creat... | 09/25/2007 |
| 7271958 | Diffractive light modulator The present invention relates to diffractive light modulators and, more particularly, to a diffractive light modulator in which the lower support for mirrors is configured in consideration of the internal intrinsic stress of a mirror, thus improving the flatness of ... | 09/18/2007 |
| 7271957 | Computer-generated hologram and its fabrication process, reflector using a computer-generated hologram, and reflective liquid crystal display The invention provides a computer-generated hologram which can be viewed in white at the desired viewing region and a reflective liquid crystal display using the same as a reflector. The computer-generated hologram H is designed to diffuse light having a given refer... | 09/18/2007 |
| 7266137 | Laser gas replenishment method Output beam parameters of a gas discharge laser are stabilized by maintaining a molecular fluorine component at a predetermined partial pressure using a gas supply unit and a processor. The molecular fluorine is subject to depletion within the discharge chamber. Gas... | 09/04/2007 |
| 7262898 | Apparatus for reducing drops in a transmission spectrum due to inter-pixel gaps The invention includes an apparatus for modulating an optical signal. The apparatus includes a modulating mechanism comprising a plurality of modulating component arrays, each modulating component array comprising a plurality of modulating components, wherein adjace... | 08/28/2007 |
| 7258915 | Flake for covert security applications Covert flakes having one or more symbols and/or a selected shape are used in a composition, such as ink or paint, to provide a covert security feature to an object. In some embodiments the composition includes base pigment, and the covert flakes are covert pigment f... | 08/21/2007 |
| 7256938 | Method for making large scale multilayer dielectric diffraction gratings on thick substrates using reactive ion etching Methods of fabricating large size, high performance multilayer diffraction gratings having a thick substrate that take advantage of reactive ion etching during the fabrication process are provided herein. In one implementation, a method of making a multilayer diffra... | 08/14/2007 |
| 7257288 | Tunable optical routing systems An optical wavelength routing device utilizes a free space optical beam propagating therethrough is provided. The device includes at least one optical fiber input, at least one optical fiber output, an optical element having an actuator with at least one tilt axis a... | 08/14/2007 |
| 7253933 | Apparatus and method for the temporal profiling of short laser pulses with thick Bragg gratings A system and/or method for temporal profiling of an incident laser pulse. The system and/or method includes a laser beam source for providing the incident laser pulse and a Bragg grating (BG) coupled to receive the incident laser pulse. The BG includes a distributio... | 08/07/2007 |
| 7251264 | Distributed bragg reflector for optoelectronic device This disclosure concerns devices such as DBRs, one example of which includes at least one first mirror layers having an oxidized region extending from an edge of the DBR to an oxide termination edge that is situated greater than a first distance from the edge of the... | 07/31/2007 |
