Reflection Grating (e.g., Retrodirective) Patents (Class 359/572)
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Publication number: 20090059375Abstract: A reflection grating device with a continuous non-reflecting dielectric adjusting layer disposed between a grating structure and one or more continuous reflecting layers is disclosed that operates in an order of interest, such as the 1st order or 3rd order of diffraction, with high efficiency and near-exclusion of unwanted orders. Such devices can be employed, for example, in telecommunication and laser applications.Type: ApplicationFiled: August 27, 2008Publication date: March 5, 2009Inventor: John Hoose
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Patent number: 7495814Abstract: Disclosed herein is a raster scanning-type display device using a diffractive optical modulator. The raster scanning-type display device includes an optical illumination unit, a diffractive optical modulator, and a projection unit. The optical illumination unit radiates light, which is emitted from a light source, in a spot beam form. The diffractive optical modulator causes an element to modulate the spot beam incident from the optical illumination unit, and generate diffracted light whose intensity is adjusted and which has a plurality of diffraction orders. The projection unit generates an image by projecting the diffracted light incident from the diffractive optical modulator onto a screen in a scanning spot beam form and performing raster scanning in which horizontal scanning and vertical scanning are alternated.Type: GrantFiled: May 12, 2006Date of Patent: February 24, 2009Assignee: Samsung Electro-Mechanics Co., Ltd.Inventors: Sang Kyeong Yun, Haeng Seok Yang
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Patent number: 7491021Abstract: A product with a surface relief grating (SRG) image effect has a surface with rotational cuts effected therein to create the SRG image effect. The SRG image has an effect based on a rotational speed of a cutting tool effecting the cuts, a travel speed of a cutting tool effecting the cuts, and a depth of the cuts. A light source can be used to emit light on the surface of the product. In an SRG image machining process, a material and a cutting tool are provided. The material is contacted by the cutting tool to a predetermined depth. The cutting tool is rotated to cut the material at a predetermined rotational speed. The cutting tool is moved to cut the material at a predetermined travel speed. A SRG image effect is produced in the material through the contacting, rotating, and moving steps.Type: GrantFiled: May 1, 2008Date of Patent: February 17, 2009Assignee: A.M. Precision Machining, Inc.Inventor: Andy G. Kozlowski
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Publication number: 20090034080Abstract: 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 components thereof. The grating has a diffraction surface, which is formed by a photolithography process.Type: ApplicationFiled: July 28, 2008Publication date: February 5, 2009Inventor: Cheng-Hao KO
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Publication number: 20090034077Abstract: 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.Type: ApplicationFiled: August 1, 2007Publication date: February 5, 2009Inventor: Steve J. Kane
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Patent number: 7485847Abstract: Optical sensors, and methods for operating optical sensors, are disclosed. One such sensor may include: a reflector positioned a distance from a reflective diffraction grating and a light source for providing light. A first portion of the light can be reflected from the reflective diffraction grating and a second portion of the light passes through the grating to the reflector and is reflected back through the diffraction grating. The sensor may further include a detector for sensing an intensity of light in an interference pattern formed by the first portion of the light reflected from the diffraction grating and the second portion of the light reflected from the reflector. The sensor includes a controller configured to modulate an emission of the light.Type: GrantFiled: December 8, 2005Date of Patent: February 3, 2009Assignee: Georgia Tech Research CorporationInventors: Fahrettin Levent Degertekin, Wook Lee, Neal Allen Hall
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Patent number: 7463419Abstract: The invention relates to an optoelectronic sensor comprising an integrated arrangement of a plurality of light emitting diodes arranged in the region of an optical receiving system for the illumination of a sensing region, with beam-shaping optical elements being associated with the light emitting diodes. The beam-shaping optical elements have optical properties which differ from one another and are dependent on their relative position to the optical receiving system. Furthermore, the beam-shaping optical elements have a wedge shape, with in each case precisely one wedge element or regions of up to four adjacent wedge elements being associated with the light emitting diodes.Type: GrantFiled: January 23, 2006Date of Patent: December 9, 2008Assignee: Sick AGInventor: Helmut Weber
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Patent number: 7463420Abstract: 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 provided with a reflective grating with a number of chosen spectral characteristics.Type: GrantFiled: September 19, 2007Date of Patent: December 9, 2008Assignees: Sinvent AS, The Board of Trustees of the Leland Stanford Junior UniversityInventors: Hakon Sagberg, Ib-Rune Johansen, Odd Lovhaugen, Olav Solgaard, Matthieu Lacolle
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Publication number: 20080266663Abstract: 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.Type: ApplicationFiled: April 26, 2007Publication date: October 30, 2008Inventors: Lacy G. Cook, Joshua J. Thornes
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Publication number: 20080259984Abstract: A structure has a photonic crystal layer comprising a first member made of a material having a first refractive index; and a second member made of a material having a second refractive index, wherein the first member has a plurality of holes periodically arranged, and the second member is placed in each of the holes so that a center of the second member is staggered from a center of the hole on a plane of the photonic crystal layer.Type: ApplicationFiled: April 18, 2008Publication date: October 23, 2008Applicant: CANON KABUSHIKI KAISHAInventor: Yasuhiro Nagatomo
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Publication number: 20080259457Abstract: For generation of optical elements, a master prototype, a resin master, a resin molded article or a metal mold is used. In the master prototype, the resin master, the resin molded article or the metal mold, a fine relief structure is formed on a plane through which an object light is transmitted at a pitch smaller than a wavelength band of the object light, an identification pattern region is disposed in a part of a region where fine relief structure is formed, and in the identification pattern region, a state of the fine relief structure is different from that in the other region. An actual manufacturer of the master prototype, the resin master, the resin molded article or the metal mold can be identified by physically verifying the identification pattern region.Type: ApplicationFiled: April 18, 2008Publication date: October 23, 2008Applicants: Sanyo Electric Co., Ltd., Sanyo Optec Design Co., Ltd.Inventors: Kazuaki Someya, Yoshiaki Maeno
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Publication number: 20080240175Abstract: A tunable laser comprises a gain section and two or more reflectors. At least one of the reflectors is a Bragg grating comprising a reduced strength section comprising a base order periodic pattern of marks and spaces from at which at least some of the marks or spaces are missing. This enables the reflective strength of the grating to be controlled relative to the other reflector. The Bragg grating may be a phase change grating with individual sections being reduced in strength by line removal.Type: ApplicationFiled: September 26, 2006Publication date: October 2, 2008Applicant: Bookham Technology PLCInventors: Douglas Charles John Reid, Andrew John Ward
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Publication number: 20080218857Abstract: A product with a surface relief grating (SRG) image effect has a surface with rotational cuts effected therein to create the SRG image effect. The SRG image has an effect based on a rotational speed of a cutting tool effecting the cuts, a travel speed of a cutting tool effecting the cuts, and a depth of the cuts. A light source can be used to emit light on the surface of the product. In an SRG image machining process, a material and a cutting tool are provided. The material is contacted by the cutting tool to a predetermined depth. The cutting tool is rotated to cut the material at a predetermined rotational speed. The cutting tool is moved to cut the material at a predetermined travel speed. A SRG image effect is produced in the material through the contacting, rotating, and moving steps.Type: ApplicationFiled: May 1, 2008Publication date: September 11, 2008Applicant: A.M. PRECISION MACHINING, INC.Inventor: Andy G. Kozlowski
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Patent number: 7424182Abstract: 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 member that is arranged at the predetermined position and includes deflection elements that deflect the light entering through the focusing optical system, a base on which the diffraction grating, the focusing optical system, and the deflection member are mounted, and a deflection member position adjusting member that adjusts a position of the deflection member with respect to one of the diffraction grating and the focusing optical system. The deflection member position adjustment member includes a positioning member that determines a reference position of the deflection member in a direction of spectral separation of the diffraction grating, and a guide member that guides the deflection member in the direction of spectral separation.Type: GrantFiled: December 20, 2006Date of Patent: September 9, 2008Assignee: Olympus CorporationInventors: Daisuke Matsuo, Takuya Taniguchi
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Patent number: 7420720Abstract: 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 hologram is partly replaced with the second embossed hologram. The invention further relates to a method for producing an optical element wherein an embossable film provided with an embossed hologram is partly filled with printing lacquer, and a method for producing an optical element wherein hologram embossing is prevented by prior partial printing of the embossing film with curable printing lacquer. The invention relates further to optical features producible by the inventive methods, documents of value having an inventive optical feature and a numbering embosser for use in an inventive production method.Type: GrantFiled: June 12, 2006Date of Patent: September 2, 2008Assignee: Giesecke & Devrient GmbHInventors: Irina Menz, Guenther Dausmann
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Patent number: 7379241Abstract: 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 the ridges comprises a first dielectric material disposed on the dielectric reflector having a first index of refraction and a second dielectric material, having a second index of refraction different than the first index of refraction, disposed on the first dielectric material.Type: GrantFiled: December 8, 2005Date of Patent: May 27, 2008Assignee: Polychromix CorporationInventor: Malcolm C. Smith
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Patent number: 7376305Abstract: 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) extends between adjacent facets of the first set (1a). Only the first set of facets (1a) is metallized to enhance reflection. The second set of facets (1b) is left unmetallized. This configuration reduces polarization dependent loss (PDL).Type: GrantFiled: November 26, 2002Date of Patent: May 20, 2008Assignee: Enablence Inc.Inventors: Andre Delage, Boris Lamontagne, Kokou Dossou, Siegfried Janz, Pavel Cheben, Lynden Erickson, Dan-Xia Xu, Sylvain Charbonneau
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Patent number: 7372607Abstract: 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 has a plurality of frequency components where each frequency component has an associated beam size. The modulating mechanism includes an array of modulating components where each modulating component has a pitch. The pitch of each modulating component is substantially equal to or less than the beam size of each frequency component.Type: GrantFiled: October 1, 2005Date of Patent: May 13, 2008Assignee: Lucent Technologies Inc.Inventor: Dan M. Marom
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Patent number: 7333127Abstract: 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 an OFF state to an ON state is detected and when this transition is detected, the light modulator element is temporarily supplied with an auxiliary driving voltage (V3) between a driving voltage (V1) for bringing the light modulator element into the ON state and a driving voltage (V2) for bringing the light modulator element into the OFF state. This suppresses an overshoot due to a sharp change of the light modulator element to the ON state and achieves beam writing with appropriate line space ratio.Type: GrantFiled: December 1, 2004Date of Patent: February 19, 2008Assignee: Dainippon Screen Mfg. Co., Ltd.Inventor: Takahide Hirawa
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Patent number: 7319553Abstract: 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 using a piece of glass.Type: GrantFiled: February 21, 2006Date of Patent: January 15, 2008Assignee: Samsung Electro-Mechanics Co., Ltd.Inventor: Suk Kee Hong
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Publication number: 20080007832Abstract: A wavelength filter, which has a simple structure with a small number of types of thin films and a small number of laminations, is produced by a simple process, has few variations of performance and has a broad wavelength band, is provided. The wavelength filter is composed of a grating in which a first portion (103) extending in X direction on a substrate surface and a second portion (105) extending in the X direction along the first portion are alternately arranged in Y direction perpendicular to the X direction on the substrate surface at a constant cycle shorter than the wavelength of light to be used. The cross-sectional figure of respective first portions in the Y direction and perpendicular to the substrate surface is provided with at least one protruding portion (107) so as to have the width in the Y direction wider than that of neighboring portions.Type: ApplicationFiled: March 24, 2006Publication date: January 10, 2008Inventor: Masato Okano
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Patent number: 7315419Abstract: 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 grating members having a cross-sectional shape respectively surrounded by two straight lines such as a triangular shape, and metal members as light-shielding members each being formed on corresponding one of the diffraction grating members at one side of the diffraction grating member along any of the straight line and the curved line of the cross-sectional shape of the diffraction grating member formed by the resin member. The metal members are configured to reduce zero-order transmitted light with respect to incident light, and to enhance diffraction efficiency of first-order transmitted light.Type: GrantFiled: October 7, 2004Date of Patent: January 1, 2008Assignee: International Business Machines CorporationInventors: Yoichi Taira, Daiju Nakano
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Patent number: 7312878Abstract: 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 of the scale includes the following steps: provision of a first reflection layer, which is unbroken over its entire surface and fulfils the relationship A=R/??3, where R represents the degree of reflection and ? represents the backscatter coefficient for electrons; application of the spacer layer to the first reflection layer; application of the second reflection layer to the spacer layer; and structuring of the second reflection layer by an electron beam lithography process.Type: GrantFiled: September 24, 2002Date of Patent: December 25, 2007Assignee: Dr. Johannes Heidenhain GmbHInventors: Peter Speckbacher, Georg Flatscher
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Patent number: 7304797Abstract: 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 the polarization dependent loss (PDL) typically associated therewith. The multiplexer/demultiplexer according to the present invention includes input and output ports optimally positioned in accordance with the grating facet diffraction envelope to minimized back reflection to the input ports and maximize output light collected from different diffraction orders.Type: GrantFiled: June 3, 2005Date of Patent: December 4, 2007Assignee: Enablence Inc.Inventors: Ashok Balakrishnan, Serge Bidnyk, Matt Pearson
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Patent number: 7289258Abstract: 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 as to incline a reflective surface.Type: GrantFiled: June 30, 2005Date of Patent: October 30, 2007Assignee: Samsung Electro-Mechanics Co., Ltd.Inventors: Yoon Shik Hong, Seung Hee Suh, Min Suk Oh, Ohk Kun Lim, Seung Heon Han
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Patent number: 7286292Abstract: 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 provided with a reflective grating with a number of predetermined spectral characteristics.Type: GrantFiled: December 22, 2003Date of Patent: October 23, 2007Assignees: Sinvent AS, The Board of Trustees of the Leland Stanford Junior UniversityInventors: H{dot over (a)}kon Sagberg, Ib-Rune Johansen, Odd Løvhaugen, Olav Solgaard, Matthieu Lacolle
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Patent number: 7286764Abstract: 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 actuate between a first configuration and a second configuration, wherein the modulator directs the channel of the first signal as an output signal when the first location is in the first configuration. The modulator may direct the channel of the first signal as a dropped signal when the first location is in the second configuration. The modulator may also receive a channel of the second signal from the second module at a second location configured to independently actuate between the first configuration and the second configuration.Type: GrantFiled: February 3, 2003Date of Patent: October 23, 2007Assignee: Silicon Light Machines CorporationInventors: Jahja I. Trisnadi, Clinton B. Carlisle
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Patent number: 7271957Abstract: 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 reference wavelength ?STD and incident thereon at a given angle of incidence ? in a specific angle range. In a range of wavelengths ?min to ?max including the reference wavelength ?STD wherein zero-order transmission light or zero-order reflection light of incident light on the computer-generated hologram at a given angle of incidence is seen in white by additive color mixing, the maximum diffraction angle ?2MIN of incident light of the minimum wavelength ?MIN in the wavelength range and incident at the angle of incidence ? is larger than the minimum diffraction angle ?1MAX of incident light of the maximum wavelength ?MAX in the wavelength range and incident at said angle of incidence ?.Type: GrantFiled: April 18, 2006Date of Patent: September 18, 2007Assignee: Dai Nippon Printing Co., Ltd.Inventors: Manami Yabuhara, legal representative, Tomohisa Hamano, Mitsuru Kitamura, Daijiro Kodama, Hiroshi Fujita, Hideo Yabuhara, deceased
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Patent number: 7271958Abstract: 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 a mirror surface and enhancing the optical efficiency of the light modulator.Type: GrantFiled: February 2, 2006Date of Patent: September 18, 2007Assignee: Samsung Electro-Machanics Co., Ltd.Inventors: Sang Kee Yoon, Jong Sam Kim
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Patent number: 7262898Abstract: 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 adjacent ones of the plurality of modulating components in each modulating component array are separated by gaps, and wherein adjacent ones of the plurality of modulating component arrays are offset along a dispersion direction of an incident optical signal such that the gaps associated with the adjacent ones of the plurality of modulating component arrays are offset. In one embodiment, rows of the modulating components in the modulating component arrays are offset along the dispersion direction of the incident optical signal by a fraction of the modulating component pitch.Type: GrantFiled: October 1, 2005Date of Patent: August 28, 2007Assignee: Lucent Technologies Inc.Inventors: Dan M. Marom, David Thomas Neilson
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Patent number: 7253933Abstract: 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 distribution of diffraction efficiency density at various depths within the BG and provides a plurality of diffracted beamlets from the incident laser pulse. The system and/or method combines the diffracted beamlets into a single temporally shaped laser beam.Type: GrantFiled: February 10, 2005Date of Patent: August 7, 2007Assignee: HRL Laboratories, LLCInventor: Oleg M. Efimov
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Patent number: 7248408Abstract: Disclosed herein is a color display apparatus using a one-panel diffractive-type optical modulator. The color display apparatus includes a plurality of light sources, an illumination lens system, a diffractive-type optical modulator, a filter system, and a projection system. The light sources simultaneously emit the light beams of corresponding wavelengths. The illumination lens system allows respective light beams to be converted into linear parallel light. The diffractive-type optical modulator forms diffractive light by diffracting incident light when the locations of at least two neighboring reflection parts vary to a predetermined distance by an actuating means. The filter system allows diffractive light having a desired diffractive order for respective wavelengths to pass therethrough when diffractive light having a plurality of diffractive orders for the respective wavelengths enters from the diffractive-type optical modulator.Type: GrantFiled: February 13, 2006Date of Patent: July 24, 2007Assignee: Samsung Electro-Mechanics Co., Ltd.Inventor: Sang Kyeong Yun
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Patent number: 7245432Abstract: A diffraction grating device (100) has both reflecting (108) and transmitting (106) gratings inter leaved to allow both transmission diffraction patterns and reflection diffraction patterns to be formed by means of the same device (102). This makes it possible, for example, to produce a diffraction pattern of one older with a beam (134) directed to be diffracted by the reflecting diffraction grating or with a beam (132) directed to be diffracted by the transmitting diffraction grating when either beam is incident alone. It also makes it possible to generate a diffraction pattern of a different order when both beams are incident simultaneously, which reduces effective order of the grating.Type: GrantFiled: March 28, 2002Date of Patent: July 17, 2007Assignee: Main Street Ventures, LLCInventor: Arie Shahar
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Publication number: 20070153388Abstract: Disclosed herein is an apparatus and method for controlling the optical output of a mobile display using a single-panel type diffractive light modulator. The apparatus includes a surrounding light amount information storage unit and an optical output adjusting means. The surrounding light amount information storage unit stores information about the amount of surrounding light. The optical output adjusting means adjusts the output values of red, green and blue light sources based on the information about the amount of surrounding light.Type: ApplicationFiled: December 19, 2006Publication date: July 5, 2007Applicant: Samsung Electro-Mechanics Co., Ltd.Inventor: Kyu Bum Han
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Patent number: 7237940Abstract: A light guide plate (30) has a light incident surface (305) for receiving light, a light emitting surface (301) for emitting light, a bottom surface (303) opposite to the light emitting surface, and side surfaces (307, 309, 311). A subwavelength grating (302) is formed on the light incident surface for diffracting the light. The subwavelength grating is a zeroth-order grating which covers a wide wavelength band and diffracts the light into zeroth-order waves. So that the light guide plate has a high light utilization efficiency and yields high uniformity of outgoing light.Type: GrantFiled: December 23, 2004Date of Patent: July 3, 2007Assignee: Hon Hai Precision Industry Co. Ltd.Inventors: Tai-Cherng Yu, Charles Leu, Ga-Lane Chen
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Patent number: 7233444Abstract: An optical system comprises a Bragg reflector configured to diffract incident light having a wavelength between about 0.1 nm and about 0.7 nm. The optical system also comprises a diffraction grating comprising parallel lines engraved on a surface of the Bragg reflector. Specifically, the diffraction grating is configured to diffract incident light having a wavelength between about 0.6 nm and about 150 nm.Type: GrantFiled: February 25, 2005Date of Patent: June 19, 2007Assignee: Jobin Yvon S.A.S.Inventors: Didier Lepere, Erick Jourdain
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Patent number: 7233443Abstract: An arrangement for dispersing light comprises a blazed diffraction grating and a mirror. The blazed diffraction grating comprises a grating plane and a multiplicity of blazed facets. Each blazed facet is oriented at a blaze angle to the grating plane. The mirror couples to the blazed diffraction grating and is oriented parallel to the blazed facets. The arrangement permits a highly dispersive optical function in a very compact structure with low polarization dependent loss.Type: GrantFiled: December 20, 2002Date of Patent: June 19, 2007Assignee: Silicon Light Machines CorporationInventors: Clinton B. Carlisle, Jahja I. Trisnadi
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Patent number: 7227690Abstract: A layer arrangement is proposed, particularly for transfer films or laminated films, which exhibits at least two superposed synthetic resin layers, between which there is provided an interface surface having a refractive structure producing a lens-like effect, the novelty claimed being a special design of the structure having a diffractive effect.Type: GrantFiled: November 7, 2003Date of Patent: June 5, 2007Assignee: OVD Kinegram AGInventors: Andreas Schilling, Wayne Robert Tompkin
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Patent number: 7221508Abstract: The reflex-type screen includes an aluminum film reflecting layer for reflecting incident light, a lower adhesive layer which is made of adhesive agent, a polarization layer for transmitting the polarized light, a upper adhesive layer which is made of adhesive agent, and a surface diffusion layer for transmitting a part of the incident light and diffusing and reflecting anther part of the incident light, and the upper adhesive layer includes a diffusing agent dispersedly.Type: GrantFiled: June 30, 2004Date of Patent: May 22, 2007Assignee: Arisawa Mfg. Co., Ltd.Inventors: Hajime Maruta, Norimitsu Ebata, Yuji Sawamura, Masatoshi Niwa
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Patent number: 7220021Abstract: The present invention provides a compact color illumination device (100) for emitting collimated light. The illumination device comprises a reflector cup (102), a blazed diffraction grating (108) formed on the inner surface of the reflector cup, and a plurality of light emitting sources (110) positioned linearly in a focal plane of the reflector cup. Each light emitting source emits a different color of light that is incident on the blazed diffraction grating. The light emitted by the light emitting sources is reflected by the blazed diffraction grating, wherein the reflected light is collimated.Type: GrantFiled: December 1, 2004Date of Patent: May 22, 2007Assignee: Motorola, Inc.Inventors: Dongxue Wang, Zili Li, George T. Valliath
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Patent number: 7218449Abstract: An optical device for scanning an optical record carrier (20) has a radiation source (25) that can emit two radiation beams of different wavelength along different optical paths (28, 29). The emitted radiation is focused on the record carrier and reflected back to a detection system (40). A beam combiner 43 is arranged in the optical path between the radiation source and the detection system for combining the two radiation beams on one optical path, thereby allowing the use of a single detection system for both radiation beams. The beam combiner includes a grating that passes one of the beams undiffracted and diffracts the other beam mainly in the first order. The profile of the grating lines show alternating slanting grooves and slanting lands.Type: GrantFiled: December 10, 2002Date of Patent: May 15, 2007Assignee: Koninklijke Philips Electronics N. V.Inventors: Ronald Reindert Drenten, Peter Coops, Petrus Theodorus Jutte
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Patent number: 7215461Abstract: In one embodiment, a light modulator includes a substrate and a number of modulator elements disposed above and spaced apart from the substrate. Each modulator element has an optically active portion adapted to receive light incident thereon, and a support portion on either side of the active portion to support the modulator element above the substrate. The modulator elements include at least one deflectable modulator element. To shorten damping time, the deflectable modulator element has a lower surface in the support portion that is closer to the substrate than a lower surface under the optically active portion.Type: GrantFiled: August 26, 2005Date of Patent: May 8, 2007Assignee: Silicon Light Machines CorporationInventors: Omar S. Leung, Alexander P. Payne
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Patent number: 7210803Abstract: An optical system is disclosed with which higher magnification can be easily achieved and aberrations can be favorably corrected, yet is compact. The optical system includes a plurality of optical surfaces including a first surface which has at least a reflective action, a second surface reflecting the light rays reflected by the first surface back toward the first surface, and a diffractive optical surface. The first surface reflects a central field-angle principal ray, which comes from the second surface and is again incident on the first surface, to the opposite side of the previous reflection with respect to a normal at a hit point of the central field-angle principal ray on the first surface.Type: GrantFiled: January 28, 2004Date of Patent: May 1, 2007Assignee: Canon Kabushiki KaishaInventors: Motomi Matsunaga, Shoichi Yamazaki, Kazutaka Inoguchi
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Patent number: 7209290Abstract: Disclosed is a diffractive micromirror and a method of producing the same. More particularly, the present invention pertains to a diffractive micromirror, in which a recess having a desired depth and width is precisely formed in a piezoelectric operation manner, and a method of producing the same.Type: GrantFiled: September 10, 2004Date of Patent: April 24, 2007Assignee: Samsung Electro-Mechanics Co., Ltd.Inventors: Seung-Do An, Sang Kyeong Yun, Jong-Hyeong Song
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Patent number: 7196343Abstract: An optical element including an anti-reflection (AR) coating is configured to reflect Extreme-Ultra-Violet (EUV) radiation only.Type: GrantFiled: December 30, 2004Date of Patent: March 27, 2007Assignee: ASML Netherlands B.V.Inventors: Maarten Marinus Johannes Wilhelmus Van Herpen, Levinus Pieter Bakker, Derk Jan Wilfred Klunder
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Patent number: 7177081Abstract: A grating light valve has with a plurality of spaced reflective ribbons are spatially arranged over a substrate with reflective surfaces. The grating light valve is configured to optimized the conditions for constructive and destructive interference with an incident light source having a wavelength ?. The grating light valve preferably has a set of movable active ribbons alternating between the set of stationary bias ribbons. The active ribbons and the bias ribbons are spatially separated over the substrate surface such that reflective regions of the substrate surface correspond to the spaces between the ribbons. The ribbons and reflective regions of the substrate optically and geometrically optimized for to generate the conditions for constrictive and destructive interference with the incident light source.Type: GrantFiled: March 8, 2001Date of Patent: February 13, 2007Assignee: Silicon Light Machines CorporationInventors: Akira Tomita, David Thomas Amm, Michael J. Daneman, James Hunter, Bryan Staker
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Patent number: 7164534Abstract: An electromagnetic radiation diffuser, operative at extreme ultraviolet (EUV) wavelengths, is fabricated on a substrate. The diffuser comprises a randomized structure having a peak and valley profile over which a highly reflective coating is formed. The reflective coating substantially takes the form of the peak and valley profile beneath it. An absorptive grating can be fabricated over the reflective coating. The grating spaces will diffusely reflect electromagnetic radiation because of the profile of the randomized structure beneath. The absorptive grating will absorb the electromagnetic radiation. The grating thus becomes a specialized Ronchi ruling that may be used for wavefront evaluation and other optical diagnostics in extremely short wavelength reflective lithography systems, such as EUV lithography systems.Type: GrantFiled: July 19, 2005Date of Patent: January 16, 2007Assignee: ASML Holding N.V.Inventors: Walter H. Augustyn, Richard A. Gontin
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Patent number: 7151635Abstract: 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 the polarization dependent loss (PDL) typically associated therewith. Accordingly, a low order (<3), high aspect ratio (>10) grating is provided with a very short side wall (less than the wavelength of the optical signal) for use with incident angles of less than 15°.Type: GrantFiled: October 25, 2004Date of Patent: December 19, 2006Assignee: Enablence, Inc.Inventors: Serge Bidnyk, Ashok Balakrishnan, Matt Pearson
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Patent number: 7149013Abstract: 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 hologram is partly replaced with the second embossed hologram. The invention further relates to a method for producing an optical element wherein an embossable film provided with an embossed hologram is partly filled with printing lacquer, and a method for producing an optical element wherein hologram embossing is prevented by prior partial printing of the embossing film with curable printing lacquer. The invention relates further to optical features producible by the inventive methods, documents of value having an inventive optical feature and a numbering embosser for use in an inventive production method.Type: GrantFiled: May 29, 2002Date of Patent: December 12, 2006Assignee: Giesecke & Devrient GmbHInventors: Irina Menz, Guenther Dausmann
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Patent number: 7139128Abstract: A reflective diffraction grating having grooves and ridges and providing high throughput efficiency in the minus-first diffraction order. All but the zeroth diffraction order and the minus-first diffraction order may be prevented from existence by directing the radiation onto the grating at an appropriate angle. The radiation having a TM polarization is eliminated from the zeroth order by destructive interference by appropriate selection of a the groove width of the grating, and radiation having a TE polarization is eliminated from the zeroth order by destructive interference by depositing an overcoat of an appropriate thickness. A dielectric material may be deposited in the grooves.Type: GrantFiled: January 6, 2004Date of Patent: November 21, 2006Assignee: Polychromix CorporationInventors: Malcolm C. Smith, Richard S. Payne