Echelette Or Blazed Grating Patents (Class 359/571)
  • Patent number: 10938176
    Abstract: The present invention relates to a diode laser with external spectrally selective feedback. It is an object of the invention is to provide an external cavity diode laser with wavelength stabilization which allows an increased overall output power in the desired wavelength range.
    Type: Grant
    Filed: May 8, 2019
    Date of Patent: March 2, 2021
    Assignee: HIGHYAG LASERTECHNOLOGIE GMBH
    Inventors: Haro Fritsche, Ralf Koch, Bastian Kruschke, Fabio Ferrario
  • Patent number: 10928564
    Abstract: A directional backlight, backlit display and method of directional backlight operation employ diffraction grating to provide emitted light collectively scattered out by diffraction gratings having a uniform intensity and angular spread. The directional backlight includes a light guide configured to guide plurality of guided light beams and a light source configured to provide the guided light beam plurality having the different radial directions. The directional backlight further includes an array of diffraction gratings configured to configured to scatter out a portion of a guided light beam of the guided light beam plurality as emitted light having an intensity and an angular spread that is uniform across the light guide surface. The backlit display further includes an array of light valves configured to modulate the emitted light to provide a displayed image.
    Type: Grant
    Filed: September 6, 2019
    Date of Patent: February 23, 2021
    Assignee: LEIA INC.
    Inventor: David A. Fattal
  • Patent number: 10921525
    Abstract: A grating coupler having first and second ends for coupling a light beam to a waveguide of a chip includes a substrate configured to receive the light beam from the first end and transmit the light beam through the second end, the substrate having a first refractive index n1, a grating structure having curved grating lines arranged on the substrate, the grating structure having a second refractive index n1, wherein the curved grating lines have line width w and height d and are arranged by a pitch ?, wherein the second refractive index n2 is less than first refractive index n1, and a cladding layer configured to cover the grating structure, wherein the cladding layer has a third refractive index n3.
    Type: Grant
    Filed: January 29, 2019
    Date of Patent: February 16, 2021
    Assignees: Mitsubishi Electric Research Laboratories, Inc., Mitsubishi Electric Corporation
    Inventors: Keisuke Kojima, Mitsunobu Gotoda, Toshiaki Koike-Akino, Mohammad Tahersima
  • Patent number: 10753868
    Abstract: There is provided a chirped diffractive element (20) in the form of a grating (22) configured for supporting a plurality of guided mode resonances (54), which resonances (54) may be considered to comprise a standing wave. Chirping the grating (22) may allow guided mode resonances (54) to be distinguishable in terms of position within a section (34) the grating (22). An incident electromagnetic field may be coupled into at least one of the sections (34) when the electromagnetic field has a wavelength value within a predetermined wavelength range and a sample has a refractive index value within a predetermined index range. The incident electromagnetic field may be reflected by at least one of the sections (34) of the grating (22) exhibiting a guided mode resonance (54).
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: August 25, 2020
    Assignee: UNIVERSITY OF YORK
    Inventors: Christopher Reardon, Graham Triggs, Thomas Krauss
  • Patent number: 10725317
    Abstract: A naked eye 3D display device is provided. The naked eye 3D display device includes a directional projection screen, a laser light source, a red monochromatic laser light source, a green monochromatic laser light source and a blue monochromatic laser light source. Lights emitted by the three monochromatic laser light sources emit incident light on the directional projection screen with nano-grating pixels at specific angles and specific positions, and the same emergent light fields are formed. The laser light source provides multi-perspective image pixels. The multi-perspective image pixels match a nano-grating pixel array on the directional projection screen. By a direct spatial modulation for the laser projection light, colorful 3D display is achieved. There is no crosstalk between various viewpoints. The naked eye 3D display device has no visual fatigue and has a low cost.
    Type: Grant
    Filed: March 8, 2016
    Date of Patent: July 28, 2020
    Assignees: SVG Optronics, Co., Ltd., Soochow University
    Inventors: Ming Zhu, Linsen Chen, Wenqiang Wan, Minghui Luo, Wen Qiao, Wenbin Huang, Yimin Lou, Donglin Pu, Pengfei Zhu
  • Patent number: 10698217
    Abstract: A diffractive backlight system includes a light source and a plate light guide. A surface of the plate light guide is configured with a diffraction grating that couples light out of the plate light guide and concentrates the light into a localized region of space. The diffractive backlight system may be used with at least one light valve array to form a display that generates images for viewing in the localized region of space. The display may be incorporated in head-mounted displays in order to generate focused augmented or virtual reality images for wearers.
    Type: Grant
    Filed: February 25, 2018
    Date of Patent: June 30, 2020
    Assignee: LEIA INC.
    Inventor: David A. Fattal
  • Patent number: 10642039
    Abstract: 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.
    Type: Grant
    Filed: April 19, 2010
    Date of Patent: May 5, 2020
    Assignee: BAE SYSTEMS plc
    Inventors: Michael David Simmonds, Mohmed Salim Valera
  • Patent number: 10627623
    Abstract: An apparatus, method and computer program wherein the apparatus includes an optical arrangement including an image source and an exit pupil wherein the exit pupil is configured to be positioned proximate to an eye of a user to enable a user to view an image from the image source; and wherein the apparatus is configured to control a size and location of the exit pupil of the optical arrangement in response to a determination of a size and location of a pupil of the eye.
    Type: Grant
    Filed: May 3, 2012
    Date of Patent: April 21, 2020
    Assignee: Nokia Technologies Oy
    Inventor: Martin Schrader
  • Patent number: 10620444
    Abstract: A diffractive optical beam shaping element for imposing a phase distribution on a laser beam that is intended for laser processing of a material includes a phase mask that is shaped as an area and is configured for imposing a plurality of beam shaping phase distributions on the laser beam incident on to the phase mask. A virtual optical image is attributed to at least one of the plurality of beam shaping phase distributions, wherein the virtual image can be imaged into an elongated focus zone for creating a modification in the material to be processed. Multiple such elongated focus zones can spatially add up and interfere with each other, to modify an intensity distribution in the material and, for example, generate an asymmetric modification zone.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: April 14, 2020
    Assignee: TRUMPF Laser- und Systemtechnik GmbH
    Inventors: Malte Kumkar, Daniel Grossmann, Daniel Flamm
  • Patent number: 10520743
    Abstract: A backlight module, a display device and a method for driving the same are disclosed, such that brightness of display device can be increased when rendering 3D display. The backlight module includes a light guide plate, a light-splitting structure and an edge light source, wherein the light-splitting structure includes a plurality of strip-shaped first light-splitting units and a plurality of strip-shaped second light-splitting units, the first light-splitting unit and second light-splitting unit are alternately disposed on the light output surface of the light guide plate, each of first light-splitting unit and second light-splitting unit comprises at least one grating strip, the first light-splitting unit is configured for directing light to output towards a first position external to the backlight module, and the second light-splitting unit is configured for directing light to emit towards a second position external to the backlight module.
    Type: Grant
    Filed: July 29, 2016
    Date of Patent: December 31, 2019
    Assignees: BOE Technology Group Co., Ltd., Beijing BOE Optoelectronics Technology Co., Ltd.
    Inventors: Jian Gao, Xue Dong, Xiaochuan Chen, Wenqing Zhao, Pengcheng Lu, Ming Yang, Qian Wang, Xiaochen Niu, Rui Xu, Lei Wang, Pengpeng Wang
  • Patent number: 10347778
    Abstract: An optical system and photo sensor pixel are provided. The photo sensor pixel includes a substrate including an active region and a peripheral region that is peripheral to the active region, an optical sensor disposed at the active region of the substrate and configured to receive light and output a measurement signal based on the received light, and an encapsulation layer disposed over the active region and the first peripheral region of the substrate. The encapsulation layer includes at least one subwavelength-based graded index structure provided over the peripheral region of the substrate, and the subwavelength-based graded index structure is configured to redirect the light from a region over the peripheral region onto the optical sensor.
    Type: Grant
    Filed: August 20, 2018
    Date of Patent: July 9, 2019
    Assignee: Infineon Technologies AG
    Inventors: Thoralf Kautzsch, Heiko Froehlich, Maik Stegemann, Mirko Vogt
  • Patent number: 10267992
    Abstract: An optical fiber launcher assembly can include a low precision fiber array that outputs a plurality of optical signals from a given side that are input into an opposing side. The optical fiber launcher assembly can also include a corrective optic aligned with and spaced apart from the low precision fiber array. The plurality of optical signals output from the low precision array to the corrective optic have a given trajectory and optical signals output from the corrective optic have a substantially parallel trajectory different from the given trajectory.
    Type: Grant
    Filed: September 19, 2017
    Date of Patent: April 23, 2019
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: Gregory D. Goodno, Joshua E. Rothenberg, James G. Ho
  • Patent number: 10133084
    Abstract: A diffractive optical element (1) includes a first diffraction grating (21) including a first grating surface (21a) and a first grating wall surface (21b), a second diffraction grating (31) including a second grating surface (31a) and a second grating wall surface (31b), and a thin film (11) provided between the first grating wall surface and the second grating wall surface and being in contact with both of the first and second grating wall surfaces, an extinction coefficient of the thin film with respect to a wavelength ? in a use wavelength band is not greater than 0.0005, and with respect to the wavelength ?, refractive indices of materials of the thin film, the first diffraction grating, and the second diffraction grating, a relative diffractive index difference of the thin film and the first diffraction grating, and a width of the thin film satisfy predetermined conditions.
    Type: Grant
    Filed: May 9, 2016
    Date of Patent: November 20, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Reona Ushigome
  • Patent number: 10084101
    Abstract: An optical system and photo sensor pixel are provided. The photo sensor pixel includes a substrate including an active region and a peripheral region that is peripheral to the active region, an optical sensor disposed at the active region of the substrate and configured to receive light and output a measurement signal based on the received light, and an encapsulation layer disposed over the active region and the first peripheral region of the substrate. The encapsulation layer includes at least one subwavelength-based graded index structure provided over the peripheral region of the substrate, and the subwavelength-based graded index structure is configured to redirect the light from a region over the peripheral region onto the optical sensor.
    Type: Grant
    Filed: November 7, 2016
    Date of Patent: September 25, 2018
    Assignee: Infineon Technologies AG
    Inventors: Thoralf Kautzsch, Heiko Froehlich, Maik Stegemann, Mirko Vogt
  • Patent number: 10069024
    Abstract: A PCA is provided including: a semiconductor substrate; a metallic antenna, formed on one surface of the semiconductor substrate; and a first pattern structure, formed on the same surface of the semiconductor substrate as the surface on which the metallic antenna is formed, to obstruct surface waves and/or back-scattered waves.
    Type: Grant
    Filed: November 11, 2014
    Date of Patent: September 4, 2018
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Chanwook Baik, Jisoo Kyoung, Sangmo Cheon
  • Patent number: 9995876
    Abstract: Compact photonics platforms and methods of forming the same are provided. An example of a compact photonics platform includes a layered structure having an active region along a longitudinal axis, a facet having an angle no less than a critical angle formed at least one longitudinal end of the active region, and a waveguide having at least one grating coupler positioned in alignment with the angled facet to couple light out to or in from the waveguide.
    Type: Grant
    Filed: July 30, 2012
    Date of Patent: June 12, 2018
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Di Liang, David A. Fattal, Marco Fiorentino, Zhen Peng, Charles M. Santori, Raymond G. Beausoleil
  • Patent number: 9902319
    Abstract: A vehicle cup holder includes a console substrate defining a cup well. A light source is positioned proximate the cup well. An insert is positioned within the cup well and defines a base wall and a side wall, wherein at least one of the base wall and the side wall defines a diffraction grating.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: February 27, 2018
    Assignee: Ford Global Technologies, LLC
    Inventors: Stuart C. Salter, Christopher Anthony Danowski, Paul Kenneth Dellock, Pietro Buttolo, James J. Surman
  • Patent number: 9784902
    Abstract: Dual-sided optical films have extended split spreading structures formed on one major surface, and extended prisms formed on an opposite major surface. One portion of each split spreading structure has a low light spreading characteristic, and another portion has a high light spreading characteristic. For each split spreading structure, the low light spreading portion may be disposed alongside the high light spreading portion. The split spreading structures may be arranged in a one-to-one correspondence with the prisms. Light that enters a given prism from one inclined surface thereof can be associated primarily with light transmitted through the low light spreading portion of the split spreading structure, and light that enters the given prism from the other inclined surface thereof can be associated primarily with light transmitted through the high light spreading portion.
    Type: Grant
    Filed: March 25, 2013
    Date of Patent: October 10, 2017
    Assignee: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Nicholas A. Johnson, Michael J. Sykora, Michael E. Lauters, John A. Wheatley
  • Patent number: 9746611
    Abstract: A grating out-coupler assembly is provided. The grating out-coupler assembly includes a substrate, a tiltable surface suspended above the substrate, an actuator configured to selectively control a pitch of the tiltable surface, and a grating out-coupler supported by the tiltable surface.
    Type: Grant
    Filed: November 18, 2015
    Date of Patent: August 29, 2017
    Assignee: THE BOEING COMPANY
    Inventor: Scott Benjamin Singer
  • Patent number: 9715049
    Abstract: A method for manufacturing a blazed diffraction grating made of a crystalline material comprising zinc selenide (ZnSe) or zinc sulfide (ZnS) includes forming the blazed diffraction grating by forming a plurality of grating grooves on a machined surface of a workpiece by machining, wherein the grating grooves are formed so that a surface comprising a (110) plane is arranged to receive the most incident light among the surfaces that constitute each grating, where (110) describes a crystal orientation of the crystalline material.
    Type: Grant
    Filed: June 19, 2013
    Date of Patent: July 25, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takashi Sukegawa, Shigeru Sugiyama
  • Patent number: 9658455
    Abstract: An optical device that is capable of producing an image in the air includes a substrate having a reflective diffraction region formed into a net structure, and a light radiation unit which radiates a light beam onto one surface of the substrate. The diffraction region is capable of collecting light beams that are diffracted in the upper space of one surface of the substrate by diffracting the light beam which is incident on one surface of the substrate. Here, the light radiation unit may have a display source that generates the light beams which form the image, and a lens portion that radiates the generated light beams onto the substrate.
    Type: Grant
    Filed: September 23, 2013
    Date of Patent: May 23, 2017
    Assignee: LG ELECTRONICS INC.
    Inventors: Sungchul Shin, Seunggyu Lee
  • Patent number: 9557454
    Abstract: A laminated diffraction optical element includes a substrate, and a resin layer provided on the substrate and including an optically effective portion and an optically non-effective outer portion adjacent to the optically effective portion. The optically non-effective outer portion in the resin layer has a continuous shape such that a layer thickness decreases when extending toward an outer periphery of the substrate. An angle formed between a straight line connecting both ends of the continuous shape and a tangent to a surface of the substrate at a point opposite to an end closer to the surface of the substrate is within a range of 20 to 60 degrees.
    Type: Grant
    Filed: May 8, 2013
    Date of Patent: January 31, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventor: Maiko Niwa
  • Patent number: 9362711
    Abstract: A tunable laser comprises a first tuner configured to select an emission wavelength of the laser; a second tuner configured to adjust a cavity mode of the laser by modifying the cavity optical path length. The second tuner is constrained by a finite tuning range. The tunable laser also comprises a controller configured to control the first and second tuners to select the emission wavelength and adjust the cavity mode in synchronization to perform phase-continuous tuning across a range larger than supported by the finite tuning range of the second tuner.
    Type: Grant
    Filed: January 8, 2013
    Date of Patent: June 7, 2016
    Assignee: Keysight Technologies, Inc.
    Inventors: Christopher L. Coleman, Gregory Douglas Vanwiggeren
  • Patent number: 9201179
    Abstract: A method of manufacturing a blazed diffractive grating includes a first step of forming a first groove having a first surface and a second surface by moving, in the first direction at a first position in the second direction, a cutting tool having a first cutting blade and a second cutting blade to cut the object; a second step of forming a second groove by moving, in the first direction at a second position separated from the first position in the second direction by a grating pitch, the cutting tool to cut the object; and a third step of forming a blazed surface of the first groove using the first cutting blade by moving, in the first direction at a third position between the first position and the second position, the cutting tool to cut the first surface of the first groove.
    Type: Grant
    Filed: December 12, 2011
    Date of Patent: December 1, 2015
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Takashi Sukegawa, Yukinobu Okura
  • Patent number: 9170424
    Abstract: Provided are an illumination unit and a display capable of achieving size reduction in a case where a plurality types of light sources emitting light with various different wavelengths are in use. An optical-path conversion member 12 is provided for performing optical-path conversion to light (red laser light Lr, green laser light Lg, and blue laser light Lg) coming from three types of light sources (a red laser 11R, a green laser 11G, and a blue laser 11B) in a light source unit 11 in such a manner that, compared with an angle formed by center rays in the light, an angle formed by center rays in outgoing light becomes much smaller. Such optical-path conversion is performed without using a large-scale optical system (optical members).
    Type: Grant
    Filed: July 22, 2011
    Date of Patent: October 27, 2015
    Assignee: SONY CORPORATION
    Inventors: Kazuyuki Takahashi, Koji Miura, Tatsuya Oiwa
  • Patent number: 9164206
    Abstract: A variable focal length achromatic lens includes a flat liquid crystal diffractive lens and a pressure-controlled fluidic refractive lens. The diffractive lens is composed of a flat binary Fresnel zone structure and a thin liquid crystal layer, producing high efficiency and millisecond switching times while applying a low ac voltage input. The focusing power of the diffractive lens is adjusted by electrically modifying the sub-zones and re-establishing phase wrapping points. The refractive lens includes a fluid chamber with a flat glass surface and an opposing elastic polydimethylsiloxane (PDMS) membrane surface. Inserting fluid volume through a pump system into the clear aperture region alters the membrane curvature and adjusts the refractive lens' focal position. Primary chromatic aberration is remarkably reduced through the coupling of the fluidic and diffractive lenses at a number of selected focal lengths.
    Type: Grant
    Filed: April 4, 2013
    Date of Patent: October 20, 2015
    Assignee: The Arizona Board of Regents of Behalf of the University of Arizona
    Inventors: Pouria Valley, Nickolaos Savidis, James T. Schwiegerling, Gholam Peyman, Nasser N. Peyghambarian
  • Patent number: 9031112
    Abstract: A manufacturing method for an excimer laser that includes a reflective Echelle diffraction grating includes obtaining information of a wavelength of a light source, a blazed order, a repetitive pitch of the grating, a material of the grating, and a predefined orientation ratio B/A that is a ratio between that a diffraction efficiency A of the blazed order and a diffraction efficiency Bb of an order lower by one order than the blazed order, and determining an initial value of a blaze angle based upon these pieces of information.
    Type: Grant
    Filed: October 2, 2012
    Date of Patent: May 12, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tsuyoshi Kitamura, Takashi Sukegawa
  • Patent number: 8970956
    Abstract: Methods of forming microelectronic structures are described. Embodiments of those methods may include forming a photomask on a (110) silicon wafer substrate, wherein the photomask comprises a periodic array of parallelogram openings, and then performing a timed wet etch on the (110) silicon wafer substrate to form a diffraction grating structure that is etched into the (110) silicon wafer substrate.
    Type: Grant
    Filed: March 30, 2011
    Date of Patent: March 3, 2015
    Assignee: Intel Corporation
    Inventors: Yun-Chung Na, John Heck, Haisheng Rong
  • Patent number: 8965152
    Abstract: A projection display 210 arranged to display an image to an observer 212 use waveguide techniques to generate a display defining a large exit pupil at the point of the observer 212 and a large field of view, while using a small image-providing light source device. The projection display 210 uses two parallel waveguides 214, 216 made from a light transmissive material. One waveguide 214 stretches the horizontal pupil of the final display and the other waveguide 216 stretches the vertical pupil of the final display and acts as a combiner through which the observer 212 views an outside world scene 220 and the image overlaid on the scene 220. In a color display, each primary color is transmitted within a separate channel R, G, B.
    Type: Grant
    Filed: December 9, 2009
    Date of Patent: February 24, 2015
    Assignee: Bae Systems PLC
    Inventor: Michael David Simmonds
  • Publication number: 20150034591
    Abstract: A manufacturing method for a grating is disclosed for the angular dispersion of light impinging the grating. The grating comprises tapered structures and cavities. A cavity width and/or corrugation amplitude is varied for achieving a desired grating efficiency according to calculation. A method is disclosed for conveniently creating gratings with variable cavity width and/or corrugation amplitude. The method comprises the step of anisotropically etching a groove pattern into a grating master. Optionally a replica is produced that is complementary to the grating master. By variation of an etching resist pattern, the cavity width of the grating may be varied allowing the optimization towards different efficiency goals.
    Type: Application
    Filed: June 7, 2012
    Publication date: February 5, 2015
    Applicants: Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO, Stichting SRON Netherlands Institute for Space Research
    Inventors: Henri Johannes Petrus Vink, Huibert Visser, Aaldert Hide Van Amerongen
  • Patent number: 8941923
    Abstract: A diffractive optical element includes a first diffraction grating and a second diffraction grating which are made of materials different from each other and are stacked in an optical axis direction, and a thin film which is arranged at least part of an interface between the first diffraction grating and the second diffraction grating, includes a single layer or multiple layers made of a material different from that of each of the first and second diffraction gratings, and is transparent to light of a working wavelength range. nd1<nd2 and 0.5<nd3?nd2<0.8 are satisfied, where nd1 is a refractive index of the material of the first diffraction grating to d-line, nd2 is a refractive index of the material of the second diffraction grating to the d-line, and nd3 is a maximum refractive index of the material of one layer of the thin film to the d-line.
    Type: Grant
    Filed: June 10, 2011
    Date of Patent: January 27, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Reona Ushigome
  • Patent number: 8885254
    Abstract: The laminated diffractive optical element includes plural diffraction gratings 21, 22 and 23 laminated with each other, the respective diffraction gratings being formed of a same light-transmissive material. In the element, reflective films are formed on grating surfaces 11 and 12 of the respective diffraction gratings, each of the reflective films being disposed between the diffraction gratings. Each of the reflective films reflects light in a specific wavelength range and transmits light in a wavelength range different from the specific wavelength range, the specific wavelength ranges of the respective reflective films being different from each other. The grating surfaces of the respective diffraction gratings are formed in shapes different from each other according to the specific wavelength ranges corresponding to the respective reflective films.
    Type: Grant
    Filed: October 5, 2010
    Date of Patent: November 11, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kenichi Saito, Kazutaka Inoguchi
  • Patent number: 8873961
    Abstract: An optical de-multiplexer (de-MUX) that includes an optical device that images and diffracts an optical signal using a reflective geometry is described, where a free spectral range (FSR) of the optical device associated with a given diffraction order abuts FSRs associated with adjacent diffraction orders. Moreover, the channel spacings within diffraction orders and between adjacent diffraction orders are equal to the predefined channel spacing associated with the optical signal. As a consequence, the optical device has a comb-filter output spectrum, which reduces a tuning energy of the optical device by eliminating spectral gaps between diffraction orders of the optical device.
    Type: Grant
    Filed: August 9, 2011
    Date of Patent: October 28, 2014
    Assignee: Oracle International Corporation
    Inventors: Ying Luo, Xuezhe Zheng, Guoliang Li, Kannan Raj, Ashok V. Krishnamoorthy
  • Publication number: 20140313584
    Abstract: To provide a highly workable diffractive optical element which realizes a high refractive index and a low wavelength dispersiveness well balanced with each other and which exhibits high heat resistance and high endurance against temperature changes, a diffractive optical element includes a base member including a diffraction grating formed on a surface thereof and a protective film provided on the surface of the base member where the diffraction grating is formed, wherein the base member is composed of a silsesquioxane resin material or a dendrimer material which has a first refractive index and a first Abbe number and wherein the protective film is composed of a silicone resin material which has a second refractive index smaller than the first refractive index and a second Abbe number smaller than the first Abbe number.
    Type: Application
    Filed: October 30, 2012
    Publication date: October 23, 2014
    Applicant: PANASONIC CORPORATION
    Inventors: Yasuyuki Hanada, Tsuguhiro Korenaga, Yuka Okada
  • Publication number: 20140307321
    Abstract: Described is a security document with a transparent security element (12) which is arranged in a window or in a transparent region of the security document and has a structure layer, in which a first region (12f) of the structure layer has an asymmetrical diffractive relief structure, wherein the first region (12f) has an optical effect which is unexpectedly different in a front view and in a rear view of the security document.
    Type: Application
    Filed: April 28, 2014
    Publication date: October 16, 2014
    Applicant: OVD Kinegram AG
    Inventors: Andreas Schilling, Wayne Robert Tompkin, Rene Schaedler
  • Publication number: 20140293425
    Abstract: The specification and drawings present a new apparatus and a new apparatus for compensation of the optical aberrations caused by a non-planar window (or windows in general, for example windows having a curved surface) using a diffractive (optical) element such as a diffractive foil in electronic/camera devices such as electronic devices with displays. According to an embodiment, an optical window of an electronic device/camera may have at least a non-planar front surface which causes an aberration of an input image. This aberration can be corrected to be below predefined one or more parameters (such as a circle with a predefined maximum radius and/or a directional shift by a predefined maximum value) using a diffractive element/foil located on/near a back surface of the optical window or between the back surface of the optical window and a sensor/camera image plane where the input image is focused on.
    Type: Application
    Filed: March 26, 2013
    Publication date: October 2, 2014
    Applicant: Nokia Corporation
    Inventors: Mikko A. Juhola, Marko K. Parikka, Antti I. Wright, Timo J. Haikka, Mikko T. Hautala
  • Publication number: 20140285891
    Abstract: A method producing a refractive or diffractive optical device, including: production, in a first layer, of at least one inclined general profile approximated by a staircase profile including plural stairsteps; production of the profile including: forming buffer patterns on the first layer and at least one sequence including: forming masking patterns, so each masking pattern includes at least one edge situated above a buffer pattern and covers at least one area of the first layer not masked by the buffer patterns, the forming the masking patterns also defining, for the first layer, plural free areas not masked by the masking patterns or by the buffer patterns; etching the free areas to form trenches in the first layer. The production of the profile also includes: removing the masking patterns, removing the buffer patterns revealing walls previously covered by the buffer patterns, and then an isotropic etching to remove the walls.
    Type: Application
    Filed: October 17, 2012
    Publication date: September 25, 2014
    Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENE ALT
    Inventor: Michel Heitzmann
  • Publication number: 20140269244
    Abstract: An objective lens (101) is configured to converge laser light of a first wavelength ?1 (390 [nm]??1?430 [nm]), laser light of a second wavelength ?2 (630 [nm]??2?680 [nm]), and laser light of a third wavelength ?3 (750 [nm]??3?810 [nm]) on an information recording surface of a first information recording medium, an information recording surface of a second information recording medium, and an information recording surface of a third information recording medium, and is configured such that the distance from a convergent point of normal diffracted order light, to a virtual collecting point formed by virtual diffracted order light between the convergent point of normal diffracted order light and a collecting point of unwanted diffracted order light is twice or more of the pull-in range of a focus error signal to be obtained in recording or reproducing information with respect to the third information recording medium.
    Type: Application
    Filed: August 5, 2013
    Publication date: September 18, 2014
    Inventors: Fumitomo Yamasaki, Yoshiaki Komma
  • Publication number: 20140247493
    Abstract: An objective lens element which has excellent compatibility with optical discs having different base material thicknesses is provided. An objective lens element 141 has optically functional surfaces on an incident side and an exit side. Either one of the optically functional surfaces is divided into an inner part 131B including a rotational symmetry axis and an outer part 131F which is a ring-shaped region surrounding the inner part 131B. On the inner part 131B, a plurality of discontinuous steps are provided. The plurality of steps change in height in the same direction from the optical axis toward the outer part, and each of the steps causes a constant optical path difference longer than the wavelength ?1 to the first incident light beam 61 and causes a constant optical path difference shorter than the wavelength ?2 to the second incident light beam 62.
    Type: Application
    Filed: May 9, 2014
    Publication date: September 4, 2014
    Applicant: Panasonic Corporation
    Inventors: Katsuhiko HAYASHI, Yasuhiro TANAKA, Michihiro YAMAGATA, Yoshiaki KOMMA, Kazuhiko ISHIMARU
  • Patent number: 8804245
    Abstract: Provided are an organic-inorganic composite resin composition and an organic-inorganic composite resin material made of a cured product thereof, containing at least an organic compound having a polymerizable functional group, metal oxide fine particles, and a polymerization initiator. The cured product obtained by curing the organic-inorganic composite resin composition through application of an active energy has a refractive index nd of 1.61 or more and 1.65 or less, Abbe's number ?d of 13 or more and 20 or less, and an anomalous dispersion characteristic ?g,F of 0.42 or more and 0.54 or less. Further provided is an optical element comprising a transparent substrate and the organic-inorganic composite resin material formed on the transparent substrate.
    Type: Grant
    Filed: January 23, 2012
    Date of Patent: August 12, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hidefumi Iwasa, Hideo Ukuda
  • Patent number: 8765360
    Abstract: Films for optical use, articles containing such films, methods for making such films, and systems that utilize such films, are disclosed.
    Type: Grant
    Filed: December 9, 2010
    Date of Patent: July 1, 2014
    Assignee: Polarization Solutions, LLC
    Inventors: Jian Jim Wang, Xuegong Deng, Anguel N. Nikolov
  • Publication number: 20140160567
    Abstract: An Al film is formed so that film forming particles are incident at normal incidence to grating wall surfaces of a diffraction grating having multiple grating portions and are incident at oblique incidence to optical effective surfaces. After that, oxidation treatment is performed from a direction to be incident at normal incidence to the optical effective surface so that the Al layer on the optical effective surface is changed to Al2O3 layer. Hence, in the diffraction grating having the multiple grating portions, the Al2O3 layer is formed on the optical effective surface for transmitting light, and the Al layer is formed on the grating wall surfaces as a light shielding layer. Thus, flare of the diffractive optical element can be suppressed.
    Type: Application
    Filed: February 18, 2014
    Publication date: June 12, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Kenichi Iwata
  • Patent number: 8743460
    Abstract: An element includes a first resin layer and a second resin layer disposed between a first glass lens substrate and a second glass lens substrate, a boundary surface between the first resin layer and the second resin layer having a diffraction grating shape including a plurality of inclined surfaces and wall surfaces. The second resin layer is composed of a fluororesin in which fine metal oxide particles are dispersed. Since a refractive index distribution easily occurs in this material during curing by application of ultraviolet light, by applying ultraviolet light substantially perpendicular to the inclined surfaces of the diffraction grating shape, a refractive index distribution is formed in the thickness direction perpendicularly to the inclined surfaces.
    Type: Grant
    Filed: August 21, 2012
    Date of Patent: June 3, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventor: Masaaki Nakabayashi
  • Patent number: 8717676
    Abstract: A diffractive light outcoupling unit for forming a part of a directive light outcoupling system of a lighting device including a plurality of diffractive outcoupling units. The diffractive light outcoupling units each include a carrier element for accommodating a diffractive surface relief pattern, and a diffractive surface relief pattern including a plurality of consecutive diffractive surface relief forms defined on a surface area of the carrier element arranged to couple light incident on the diffractive surface relief pattern outside the carrier element via interaction involving at least two surface relief forms of the plurality of surface relief forms of the diffractive surface relief pattern so as to enhance the directivity of the coupled light. A diffractive light outcoupling system includes a plurality of diffractive light outcoupling units. A lightguide includes the outcoupling system.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: May 6, 2014
    Assignee: Modilis Holdings LLC
    Inventor: Kari Rinko
  • Publication number: 20140098656
    Abstract: An optical element has at least one surface divided into a plurality of regions and includes: a first region configured to converge light with a wavelength ?1 onto a storage surface of a first optical disc and converge light with a wavelength ?2 onto a storage surface of a second optical disc; and a second region formed around the outer circumference of the first region and configured to converge light with the wavelength ?1 onto the storage surface of the first optical disc. The second region has a concave-convex structure concentrically formed on an aspheric surface and having a cross section being a saw teeth shape. The concave-convex structure is formed by a plurality of different saw teeth shapes, and the plurality of different saw teeth shapes respectively give different phase differences corresponding to substantially integer multiples of the wavelength ?1, for light with the wavelength ?1.
    Type: Application
    Filed: December 9, 2013
    Publication date: April 10, 2014
    Applicant: Panasonic Corporation
    Inventors: Kazuhiro MINAMI, Yoshiaki KOMMA, Fumitomo YAMASAKI
  • Publication number: 20140085726
    Abstract: A lens in accordance with the present invention includes an switchable cell consisting of optical substrate with diffraction surface, elastic film in contact with the diffraction surface of the substrate, optical fluid that fills the space between the film and diffraction surface and the mean to transfer the optical fluid in and out of the space between the film and diffraction surface. The refractive index of the optical fluid matches the refractive index of the optical substrate. The switchable cell changes focus positions between refractive focus in relaxed state when the pressure at both sides of the film is the same and diffraction focus when the optical fluid is transported from the space between the film and optical substrate for the film to largely conform to the diffraction surface shape of the optical substrate.
    Type: Application
    Filed: September 25, 2012
    Publication date: March 27, 2014
    Inventor: Valdemar Portney
  • Publication number: 20140043687
    Abstract: A diffractive optical element includes: a body being composed of a first optical material and having a diffraction grating on the surface thereof; and an optical adjustment layer being composed of a second optical material and provided on the body so as to cover the diffraction grating. An envelope passing through the edge of the diffraction grating presents a curved surface, and the optical adjustment layer has a uniform thickness along the normal direction from the envelope.
    Type: Application
    Filed: June 6, 2012
    Publication date: February 13, 2014
    Applicant: PANASONIC CORPORATION
    Inventors: Akiko Murata, Yuka Okada, Tatsutoshi Suenaga, Takamasa Ando
  • Publication number: 20140043686
    Abstract: Provided is an immersion diffraction element that prevents decrease of diffraction efficiency thereof so as to satisfy optical performance. A reflection type diffraction element is made of a material transmitting a light, beam having a predetermined wavelength. An echelle diffraction grating covered with a reflecting film that prevents transmission of the light beam is formed on one surface of the material. A diffraction grating is formed off in a repeated manner, a blazed surface facing incident light and a non-blazed surface connecting the blazed surface to a neighboring blazed surface. An angle formed between the blazed surface and the non-blazed surface is an acute angle. A defect generated at a grating vertex of the blazed surface fails in a shadow of the neighboring blazed surface so as to prevent the incident light from becoming scattered light due to the defect portion.
    Type: Application
    Filed: July 30, 2013
    Publication date: February 13, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Shigeru Sugiyama, Masato Tanaka
  • Patent number: 8634120
    Abstract: A color sequential illumination device including in series: first and second light sources; a condenser lens; and a grating device. The grating device includes at least one Bragg grating. The condenser lens directs light from the first and second sources into the grating device at first and second incidence angles respectively. The grating device diffracts light from the first and second sources into a common direction. Desirably, the Bragg gratings are Electrically Switchable Bragg Gratings. In one embodiment the light sources are Light Emitting Diodes. Alternatively lasers may be used.
    Type: Grant
    Filed: October 27, 2006
    Date of Patent: January 21, 2014
    Assignee: SBG Labs Inc.
    Inventors: Milan Momcilo Popovich, Jonathan David Waldern
  • Publication number: 20140009833
    Abstract: A lens including: a central refracting portion and a peripheral portion configured to support the lens in a lens mount wherein the peripheral portion has a surface including at least one out-coupling element configured to couple light out of the lens.
    Type: Application
    Filed: February 14, 2011
    Publication date: January 9, 2014
    Applicant: Nokia Corporation
    Inventors: Mikko Juhola, Pasi Saarikko, Marko Parikka