Holographic Patents (Class 369/103)
  • Patent number: 10585044
    Abstract: In a method for measuring radiation, the radiation is temporally and/or spatially separated by a modulator to direct at least N different combinations of radiation incident on each region into at least two and fewer than N distinct directions. The total intensity of radiation in each direction is measured with a detector for each modulator configuration and the detector outputs are analyzed statistically to obtain information relating to the spectral properties of the radiation. In this way substantially all of the energy received at the entrance aperture of a measurement device is encoded into multiple outputs and the multiplexed output is received by a small number of detectors.
    Type: Grant
    Filed: May 23, 2018
    Date of Patent: March 10, 2020
    Assignee: 10103560 Canada Ltd.
    Inventors: David Prystupa, John Pacak
  • Patent number: 10451402
    Abstract: The present invention relates to a full-field reflection phase microscope. In a preferred embodiment, the invention can combine low-coherence interferometry and off-axis digital holographic microscopy (DHM). The reflection-based DHM provides highly sensitive and a single-shot imaging of cellular dynamics while the use of low coherence source provides a depth-selective measurement. A preferred embodiment of the system uses a diffraction grating in the reference arm to generate an interference image of uniform contrast over the entire field-of-view albeit low-coherence light source. With improved path-length sensitivity, the present invention is suitable for full-field measurement of membrane dynamics in live cells with sub-nanometer-scale sensitivity.
    Type: Grant
    Filed: January 25, 2012
    Date of Patent: October 22, 2019
    Assignees: Massachusetts Institute of Technology, Hamamatsu Photonics K.K.
    Inventors: Zahid Yaqoob, Wonshik Choi, Toyohiko Yamauchi, Michael Feld, David Feld, Alison Hearn, Jonathan Feld
  • Patent number: 10403671
    Abstract: The method for manufacturing a plurality of optical modules each comprising a first (C1) and a second (C2) optical component comprises the steps of a) providing a first substrate wafer (S1) on which a plurality of the first optical components (C1) is present on a top side of the first substrate wafer; b) providing a second substrate wafer (S2) having a material region which is a continuous laterally defined region in which material of the second substrate is present, wherein a plurality of the second optical components (C2) is present in said material region; c) achieving a lateral alignment of the first (S1) and second (S2) substrate wafers such that each of the first optical components (C1) is present in a laterally defined region not overlapping said material region; d) interconnecting the first and second substrate wafers in said lateral alignment such that the top side of the first substrate wafer faces a bottom side of the second substrate wafer with no further wafer in between.
    Type: Grant
    Filed: December 8, 2014
    Date of Patent: September 3, 2019
    Assignee: ams Sensors Singapore Pte. Ltd.
    Inventor: Markus Rossi
  • Patent number: 10386308
    Abstract: A pattern inspection apparatus includes a first half-wave plate to receive an ultraviolet light linearly polarized in a first electric field oscillation direction, and output a linearly polarized light polarized in a second electric field oscillation direction obtained by rotating by an integer multiple of 90°, a mirror to reflect the linearly polarized light polarized in the second electric field oscillation direction, and output a linearly polarized light polarized in a third electric field oscillation direction parallel or orthogonal to the second electric field oscillation direction, a second half-wave plate to convert the linearly polarized light polarized in the third electric field oscillation direction, which has been reflected, to a linearly polarized light polarized in a fourth electric field oscillation direction by rotating by an angle different from an integer multiple of 90°.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: August 20, 2019
    Assignee: NuFlare Technology, Inc.
    Inventors: Toshiaki Otaki, Riki Ogawa
  • Patent number: 10345496
    Abstract: The invention is directed at a miniature grism system. The miniature grism system is a single compact device that comprises a grism with collimating and focusing optics. In an aspect, the grism includes at least one prism and a grating. In an aspect, the miniature grism system, and more specifically the grism, includes at least one prism which is placed on either side of the grating. The focusing optics and the collimating optics are found on opposite sides of the grism system, sandwiching the prism and grating of the grism. In an aspect, the miniature grism system is configured to be retained within a filter wheel. The miniature grism system is configured to be used with telescopes having a small focal ratio.
    Type: Grant
    Filed: June 13, 2017
    Date of Patent: July 9, 2019
    Assignee: University of Iowa Research Foundation
    Inventors: Dominic Ludovici, Robert Mutel
  • Patent number: 10081077
    Abstract: This disclosure provides a device for heating to generate a uniform molten pool, including: a source unit for generating an energy beam; a beam expanding/reducing unit positioned in an energy path of the energy beam for adjusting the diameter of the energy beam; a flat-top conical lens set positioned in the energy path and including at least two flat-top axicons, with the beam expanding/reducing unit positioned between the source unit and the flat-top conical lens set; and a focusing lens positioned in the energy path, with the flat-top conical lens set between the beam expanding/reducing unit and the focusing lens, and the energy beam being focused by the focusing lens. This disclosure generates a uniform molten pool to prevent vaporization splash due to overheating of the material during melting.
    Type: Grant
    Filed: December 28, 2015
    Date of Patent: September 25, 2018
    Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Kuang-Yao Huang, Chien-Jung Huang, Kuo-Tso Chen, Chun-Jen Gu
  • Patent number: 9964925
    Abstract: A holographic display (“display”) for a head-mounted display (“HMD”). The display includes a source configured to emit at least partially coherent light and a beam conditioner that conditions the light from the source into one or more beams of light. The display also includes one or more spatial light modulators configured to encode the one or more beams of light using a hologram of a virtual reality image. The display further includes an objective lens and a conversion lens. The objective lens is positioned to create an intermediate image at a Fourier plane, and the intermediate image is a Fourier transform of the hologram. The conversion lens performs a Fourier transform of the intermediate image to generate an output hologram. The conversion lens also magnifies a portion of the output hologram and directs the magnified portion of the output hologram to an exit pupil of the HMD.
    Type: Grant
    Filed: December 29, 2015
    Date of Patent: May 8, 2018
    Assignee: Oculus VR, LLC
    Inventors: Hee Yoon Lee, Wanli Chi, Douglas Robert Lanman
  • Patent number: 9966106
    Abstract: An error correction block generated by performing error correction coding to the user data is divided into b number of sectors (b: a natural number), each sector having a number of bits (a: a natural number), the sector is divided into c number of sub-sectors (c: a natural number) and bits are distributed to each of the c number of sub-sectors, arrangement order of the bits is randomized for each sub-sector to which the bits are distributed, the c number of sub-sectors in which the arrangement order of the bits is randomized are combined to generate an interleaved sector, the interleaved sector is divided into c/d (d: a natural number, c?d, and c>d) and e number of divided interleaved sectors (e: a natural number, e?b, and b>e) are combined to generate a pre-modulation block, which is modulated by a modulation rule.
    Type: Grant
    Filed: March 4, 2015
    Date of Patent: May 8, 2018
    Assignee: Hitachi Consumer Electronics Co., Ltd.
    Inventors: Masakazu Ikeda, Jyunya Iizuka, Yusuke Nakamura
  • Patent number: 9940966
    Abstract: Provided are an optical information reproduction device and a method therefor with which the influence of reference light reflected from the surface of a disk can be reduced, thereby enabling data to be reproduced in a stable manner in an optical information reproduction device that uses holography.
    Type: Grant
    Filed: December 4, 2013
    Date of Patent: April 10, 2018
    Assignee: Hitachi Consumer Electronics Co., Ltd.
    Inventors: Makoto Hosaka, Shinji Fujita
  • Patent number: 9940964
    Abstract: An optical information recording/reproducing device which records an interference pattern between a reference beam and a signal beam as a hologram in an optical information storage medium or reproduces information from the optical information storage medium, the optical information recording/reproducing device includes a light source unit which emits a light beam, a signal-beam/reference-beam optical unit which generates the signal beam and the reference beam from the light beam and irradiates the optical information storage medium, a spatial light modulator which adds information to the generated signal beam, a photodetection unit which detects a reproduced beam from the optical information storage medium and acquires a reproduced image constituted by a plurality of pixels arrayed in a lattice shape, and a signal processing unit which performs equalization processing to a first pixel of the reproduced image to have a target characteristic.
    Type: Grant
    Filed: February 23, 2015
    Date of Patent: April 10, 2018
    Assignee: Hitachi Consumer Electronics Co., Ltd.
    Inventors: Kazuyuki Tajima, Yusuke Nakamura
  • Patent number: 9817159
    Abstract: A pattern projector disclosed herein generates and projects a structured light pattern suitable for use in a variety of active depth sensing technologies. In one implementation, a structured light pattern is generated by directing a coherent light beam through a pseudorandom diffuser element. Output of the pseudorandom diffuser element is received by a relay optic configured to spatially filter incident light to generate an output speckle illumination and to project the output speckle illumination to a three-dimensional scene.
    Type: Grant
    Filed: January 31, 2015
    Date of Patent: November 14, 2017
    Inventor: Josh Hudman
  • Patent number: 9798084
    Abstract: This disclosure provides systems, methods, and apparatus for a photonic chip. The photonic chip includes one or more electronic components in addition to one or more optical components. An optical coupler can be utilized for coupling external optical fibers or sources with the optical components. The optical coupler can include a beam splitter for splitting an incident light having both trans-electric (TE) and trans-magnetic (TM) polarizations into two beams having only TE and TM polarizations. The light beam with TM polarization is incident on a grating coupler on the chip having a horn section, which includes gratings. The light beam is reflected onto the grating coupler such that the direction of TM polarization is within the first plane of incidence, and the first beam of light is incident on the first plurality of gratings at an angle with respect to a normal to the plane of the first grating coupler.
    Type: Grant
    Filed: November 17, 2016
    Date of Patent: October 24, 2017
    Assignee: Google Inc.
    Inventors: Lieven Verslegers, Ryohei Urata
  • Patent number: 9786312
    Abstract: The purpose of the present invention is to provide a hologram reproducing apparatus and a hologram reproducing method, which are suitable for reproducing hologram. The purpose can be achieved by means of a hologram reproducing apparatus, which reproduces information signals by irradiating an optical information recording medium with reference light, and a hologram reproducing method for the hologram reproducing apparatus.
    Type: Grant
    Filed: September 18, 2013
    Date of Patent: October 10, 2017
    Assignee: Hitachi Consumer Electronics Co., Ltd.
    Inventors: Kazuyoshi Yamazaki, Tatsuro Ide
  • Patent number: 9761263
    Abstract: An optical information recording and reproducing device that records information on a recording medium and/or reproduces information on the recording medium, using holography is configured to include a laser light source that performs irradiation with laser light, a first light-shielding portion which is capable of switching between transmission and shielding of laser light emitted from the laser light source, and a driving circuit that drives the switching between transmission and shielding of the first light-shielding portion, and a first movement portion that moves the first light-shielding portion.
    Type: Grant
    Filed: December 12, 2012
    Date of Patent: September 12, 2017
    Assignee: Hitachi Consumer Electronics Co., Ltd.
    Inventors: Hirofumi Taguchi, Koji Fujita, Nobuo Nakai, Koichiro Nishimura, Taku Hoshizawa, Kazuyoshi Yamazaki
  • Patent number: 9651918
    Abstract: Provided is a holographic recording method in which an interference fringe between a reference beam and a signal beam, modulated according to information regarding a plurality of hologram pixels, is recorded on a holographic recording medium, the holographic recording method including multiplexing-recording the interference fringe of the plurality of hologram pixels such that at least a part of the interference fringe recorded of neighboring hologram pixels of the plurality of hologram pixels is overlapped.
    Type: Grant
    Filed: September 19, 2013
    Date of Patent: May 16, 2017
    Assignees: SAMSUNG ELECTRONICS CO., LTD., SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION
    Inventors: Kyoung-seok Pyun, Byoung-ho Lee, Sun-il Kim, Chil-sung Choi, Soon-gi Park, Jung-kwuen An, Kee-hoon Hong, Ji-woon Yeom, Jong-hyun Kim
  • Patent number: 9627845
    Abstract: Disclosed is a method for manufacturing an optical unit, including a step of bringing two side face portions of a ceramic package into contact with two contact portions of a jig, a step of placing plural light-receiving and light-emitting elements in a predetermined region of the ceramic package with reference to the contact portions of the jig, and a step of connecting the plural light-receiving and light-emitting elements to a wiring line part formed in the ceramic package by using a bonding wire, wherein at least one of the plural light-receiving and light-emitting elements is placed between one of the two contact portions of the jig and another one of the plural light-receiving and light-emitting elements in the step of placing the plural light-receiving and light-emitting elements.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: April 18, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Masaki Hiroi, Satoru Sugawara
  • Patent number: 9607648
    Abstract: This recording/reproducing apparatus that records or reproduces information by radiating light to a recording medium is provided with: a medium rotating unit that rotates the recording medium; a moving unit having a movable unit that is capable of moving within a predetermined plane; a rotation angle detecting unit that detects a rotating angle of the recording medium using an angle detection mark that is provided on the recording medium; a position detecting unit that detects a position of the recording medium using an eccentricity detection mark that is provided on the recording medium; and a member for fixing the rotation angle detecting unit and the position detecting unit. With respect to the member, the movable unit relatively moves within a plane substantially parallel to the recording surface of the recording medium, and the medium rotating unit is fixed to the movable unit.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: March 28, 2017
    Assignee: Hitachi Consumer Electronics Co., Ltd.
    Inventor: Shinsuke Onoe
  • Patent number: 9581961
    Abstract: The present method includes a data acquisition process and tomographic image generation processes. In the data acquisition process, holograms of an object light and so forth are acquired for each light with a wavelength by changing the wavelengths of the illumination light, off-axis spherical wave reference light, and inline spherical wave reference light. In the tomographic image generation process, a reconstructed light wave of the object light and a reconstructed light wave of the illumination light on a reconstruction surface are generated from these holograms. A reconstruction light wave with adjusted phase is added up for each wavelength to generate a tomographic hologram. From this, an accurate and focused tomographic image without distortion can be generated.
    Type: Grant
    Filed: October 4, 2013
    Date of Patent: February 28, 2017
    Assignee: University of Hyogo
    Inventor: Kunihiro Sato
  • Patent number: 9544466
    Abstract: The disclosed embodiments provide for checking documents for security compliance when the documents are printed, scanned, or copied. A security status is determined based on security indicators within a document's content. Security indicators can be located within a document's text, figures, watermarks, security marks, and invisible marks. Security indicators can be found by comparing a document's content to a set of stored indicator descriptions. The indicators found are used to determine a document score and security responses are triggered based on the document score.
    Type: Grant
    Filed: October 9, 2014
    Date of Patent: January 10, 2017
    Assignee: Xerox Corporation
    Inventors: Lee D. Roche, Kishore Kumar Manikkoth Vasudevan, Ramesh Nagarajan
  • Patent number: 9520152
    Abstract: A hologram apparatus and hologram optical system includes: a light source which emits a light beam; a splitter which splits the light beam emitted from the light source into a first light beam and a second light beam; a first lens for exposing an optical information recording medium to convergent light of the first light beam; an optical path angle varying device which causes the second light beam to become incident at substantially the same position as the first light beam in the optical information recording medium and changes an angle of incidence of the second light beam incident on the optical information recording medium; and an optical path shifting element which shifts a position of a light beam incident on the optical information recording medium, according to an angle to the optical information recording medium of the light beam incident on the optical information recording medium.
    Type: Grant
    Filed: September 9, 2015
    Date of Patent: December 13, 2016
    Assignee: Hitachi-LG Data Storage, Inc.
    Inventor: Kazuyoshi Yamazaki
  • Patent number: 9495992
    Abstract: A holographic data reproduction apparatus is provided. The holographic data reproduction apparatus includes: a charged-coupled device (CCD) that photographs diffracted-light from a recording medium irradiated with reference light, wherein the diffracted-light corresponds to a data page, an operation unit that calculates an optimal threshold value by applying a fitness function (Fit) to a genetic algorithm for detecting a number of error bits of the data page corresponding to the diffracted-light, a control unit that determines an output value of each pixel of the data page based on the optimal threshold value, and a decoding unit that decodes and outputs reproduction data according to the output value of the each pixel. Accordingly, it is possible to minimize a bit error rate (BER) and accurately reproduce holographic data.
    Type: Grant
    Filed: August 7, 2013
    Date of Patent: November 15, 2016
    Assignee: FOUNDATION OF SOONGSIL UNIVERSITY-INDUSTRY COOPERATION
    Inventors: Sungbin Im, Sunho Kim
  • Patent number: 9484054
    Abstract: An optical disc information device is an optical disc information device for reproducing and/or recording information with respect to an optical disc including a track in the form of a groove, and capable of recording information in a land portion and in a groove portion of the groove. The optical disc information device includes a laser light source, an objective lens, a transmittance limiting element, a dividing element, a light detector, a central amplifier, at least two end amplifiers, a gain controller, an adder, a reproduction signal processor, and a control signal processor. The transmittance limiting element includes a first central region, and at least two first end regions which interpose the first central region therebetween, and attenuates light passing through at least the first end regions out of a light flux emitted from the laser light source more strongly than light passing through the first central region.
    Type: Grant
    Filed: September 9, 2015
    Date of Patent: November 1, 2016
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Kanji Wakabayashi, Kousei Sano, Fumitomo Yamasaki, Yoshiaki Komma, Toshiyasu Tanaka
  • Patent number: 9465555
    Abstract: A method for improving I/O performance by a storage controller is provided. The method includes receiving a command completion from a storage device and checking for a command stored in a command queue for more than a predetermined time period. If a command has been in the command queue for more than the predetermined time period, then issuing the command and removing the command from the command queue. If no commands have been stored in the command queue for more than the predetermined time period, then determining if there are any uncompleted commands previously issued to the storage device. If there are not any uncompleted commands previously issued to the storage device, then processing a next command in the command queue and removing the next command from the command queue.
    Type: Grant
    Filed: August 12, 2013
    Date of Patent: October 11, 2016
    Assignee: Seagate Technology LLC
    Inventors: Michael David Barrell, Zachary David Traut
  • Patent number: 9443548
    Abstract: A hologram reproducing device which reproduces information from a recording medium having information recorded by interfering a signal beam and a reference beam, provided with a first light-angle change unit which changes an irradiation angle of the reference beam; a second light-angle change unit which changes the irradiation angle of the reference beam; a photodetector which detects a reproduction beam; a first light-angle drive-signal output unit which outputs a drive signal of the first light-angle change unit; a first light-angle control unit which controls the first light-angle change unit on the basis of the output of the photodetector; a second light-angle drive-signal output unit which outputs a drive signal of the second light-angle change unit; a second light-angle control unit which controls the second light-angle change unit; and a light-angle interpolation processing unit which controls a control target value of the second light-angle control unit.
    Type: Grant
    Filed: October 21, 2015
    Date of Patent: September 13, 2016
    Assignee: Hitachi-LG Data Storage, Inc.
    Inventors: Kenichiro Yamada, Kazuyoshi Yamazaki
  • Patent number: 9442460
    Abstract: The present disclosure relates to a digital hologram display device displaying 3D image as a hologram by using a complex modulation. The digital hologram display device comprising a spatial light modulator including a first pixel outputting a first modulation light by modulating a phase of a first plane-polarized light and a second pixel outputting a second modulation light by modulating the phase of the first plane-polarized light, wherein the second pixel is adjacent to the first pixel; and a light combiner changing a path of the first modulation light outputted from the first pixel so that the path of the first modulation light corresponds to a path of the second modulation light outputted from the second pixel for combining the first modulation light with the second modulation light, wherein a phase of the first modulation light is different from a phase of the second modulation light.
    Type: Grant
    Filed: July 24, 2013
    Date of Patent: September 13, 2016
    Assignee: LG Display Co., Ltd.
    Inventors: Minsung Yoon, Sunwoo Kim, Minyoung Shin
  • Patent number: 9418695
    Abstract: An RF hologram is divided in a direction perpendicular to a tangent line of an information track of an information recording surface of an optical disc, and includes a central region including an optical axis of laser light as well as a first end portion region and a second end portion region which sandwich the central region, the central region is formed by a binary diffraction grating and generates ±1 order diffracted light, the first end portion region is formed by a blazed diffraction grating and generates first +1 order diffracted light, the second end portion region is formed by a blazed diffraction grating and generates second +1 order diffracted light, and an RF light receiving element receives both the ±1 order diffracted light, the first +1 order diffracted light, and the second +1 order diffracted light.
    Type: Grant
    Filed: December 16, 2015
    Date of Patent: August 16, 2016
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Fumitomo Yamasaki, Kousei Sano, Yoshiaki Komma, Kanji Wakabayashi, Toshiyasu Tanaka
  • Patent number: 9406344
    Abstract: Provided are an optical information recording/reproduction device and an optical information recording/reproduction method with which retry data during verify error detection can be efficiently recorded. In the optical information recording/reproduction device for recording data on an optical information recording media and reproducing data from an optical information recording medium, if verify error data is detected at a first cure unit region on the optical information recording medium, verify error retry data is recorded at a second cure unit region which is different to the first cure unit region.
    Type: Grant
    Filed: January 16, 2012
    Date of Patent: August 2, 2016
    Assignee: HITACHI CONSUMER ELECTRONICS CO., LTD.
    Inventor: Masayuki Hirabayashi
  • Patent number: 9229430
    Abstract: Devices and methods for recording and reproducing a holographic 3D image are provided. The devices for recording the holographic 3D image comprising: a laser generation unit for emitting a laser beam; a beam splitter unit configured to receive the laser beam from the laser generation unit and split the laser beam into a reference beam and an object beam directed to an object to be photographed; a photorefractive crystal configured to receive the reference beam from the beam splitter and the object beam diffused from the object to form a holographic 3D image; and a rotation unit configured to rotate the photorefractive crystal once every time one holographic 3D image is recorded. The holographic 3D image can be recorded and reproduced by the rotate the photorefractive crystal in light paths of recording and reproduction light beams, respectively.
    Type: Grant
    Filed: December 23, 2013
    Date of Patent: January 5, 2016
    Assignees: BOE Technology Group Co., Ltd., Beijing BOE Display Technology Co., Ltd.
    Inventors: Xiaoyi Zheng, Junwei Wang, Xiaopeng Cui
  • Patent number: 9207637
    Abstract: A hologram recording and reproducing apparatus including: a coherent light source; a beam splitter which splits a beam emitted from the coherent light source into a signal beam and a reference beam; a signal beam forming unit which modulates the signal beam split and directs the modulated signal beam onto a hologram recording medium; and a reference beam forming unit which directs the reference beam to be irradiated onto a location on the hologram recording medium which overlaps with a location on the hologram recording medium on which the signal beam is incident, wherein the signal beam forming unit includes: a first light guide member which transmits the signal beam split by the beam splitter; a spatial light modulator (SLM) which modulates the signal beam transmitted through the first light guide member; and a holographic Fourier transformation optical device which focuses the modulated signal beam onto the hologram recording medium.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: December 8, 2015
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kyoung-seok Pyun, Andrew Putilin, Alexander Morozov, Ivan Bovsunovskiy, Vladislav Druzhin, Sang-yoon Oh, Sang-yoon Lee, Chul-sung Choi
  • Patent number: 9104103
    Abstract: An information recording medium manufacturing method includes steps of forming, on a support, a recording layer containing a polymer compound having an azobenzene structure, irradiating the recording layer with first writing light to form a first light-diffracting structure having a three-dimensional relief pattern on the surface of the recording layer, fixing the relief pattern by forming a deformation preventing layer on the surface of the recording layer, and irradiating the recording layer having the fixed relief pattern with second writing light to forcedly inhibit deformation caused by the movement of molecules, thereby forming a second light-diffracting structure having a refractive index change inside the recording layer.
    Type: Grant
    Filed: March 12, 2009
    Date of Patent: August 11, 2015
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Takeo Miki, Takashi Yamaguchi, Kenji Miyazaki
  • Patent number: 9082417
    Abstract: An optical information recording apparatus configured to record information into an information recording medium by using holography, the apparatus including: a signal generation unit configured to generate two-dimensional data; and a two-dimensional spatial light modulator unit configured to display the two-dimensional data and to spatially modulate a transmitted or reflected beam, wherein the two-dimensional spatial light modulator unit includes a signal region and an external region, the signal region displays two-dimensional data based on user data, the external region displays two-dimensional data not including the user data, and the signal generation unit generates two-dimensional data in such a manner that a frequency of the two-dimensional data displayed on the external region becomes equal to or larger than a frequency of the two-dimensional data displayed on the signal region.
    Type: Grant
    Filed: August 6, 2014
    Date of Patent: July 14, 2015
    Assignees: HITACHI-LG DATA STORAGE, INC., HITACHI CONSUMER ELECTRONICS CO., LTD.
    Inventors: Atsushi Neo, Junya Ilzuka, Yusuke Nakamura, Kazuyuki Tajima
  • Publication number: 20150131424
    Abstract: An optical information recording/reproduction device appropriately adjusting a recording condition and a method and a medium therefor are provided in order to cope with a problem that the signal-to-noise ratio (SNR) during reproduction decreases, unless the condition during recording is adjusted, because of variation in the environment during recording, variation of components such as laser output, variation of production of the device, and the like in the optical information recording/reproduction device using holography. In an optical information recording/reproduction device configured to record or reproduce information to an optical information recording medium by using holography, a recording condition is adjusted, before user data are recorded, in an adjustment area provided for recording condition adjustment in an optical information recording medium.
    Type: Application
    Filed: May 23, 2012
    Publication date: May 14, 2015
    Applicant: Hitachi Consumer Electronics Co., Ltd.
    Inventors: Makoto Hosaka, Kazuyoshi Yamazaki
  • Patent number: 9030921
    Abstract: Techniques are provided for increasing spectral efficiency over data channels in a storage or communication system. In some embodiments, data may be encoded and transmitted over multiple channels. The transmitted data from the multiple channels may be considered together as a channel bundle, thereby increasing the edge transitions of the group of signals to improve clock recovery and reduce coding constraints. In some embodiments, the channel bit size is reduced to maximize data rates based on the reduced coding constraints. Furthermore, the channel bundle has only one channel with timing markers, so that a receiver may receive information from the channel bundle and recover clocking based on the timing markers in the one channel.
    Type: Grant
    Filed: June 6, 2011
    Date of Patent: May 12, 2015
    Assignee: General Electric Company
    Inventors: John Anderson Fergus Ross, Michael James Hartman, John Erik Hershey, Richard Louis Zinser, Xiaolei Shi
  • Patent number: 9025425
    Abstract: In an optical information recording device and optical information recording method for angularly multiplexing and recording data on pages on the same recording region on a hologram disk, data on each page is sequentially generated by sequentially dividing input data in predetermined units, the pages to be recorded on the same recording region are divided into page groups so that pages to be recorded adjacently by the angular multiplexing may not belong to the same group, each page group is individually subjected to inter-page coding processing for computing an error-correcting code and adding the computed error-correcting code, and data on the pages subjected to the inter-page coding processing is angularly multiplexed and recorded on the hologram disk.
    Type: Grant
    Filed: November 15, 2013
    Date of Patent: May 5, 2015
    Assignee: Hitachi Consumer Electronics Co., Ltd.
    Inventor: Junya Iizuka
  • Publication number: 20150109895
    Abstract: When books are densely bedded on a recording medium for recording a hologram on the medium with a high density, the books need to be positioned at a reference light irradiation position with a high precision when reproducing.
    Type: Application
    Filed: October 21, 2014
    Publication date: April 23, 2015
    Applicant: Hitachi-LG Data Storage, Inc.
    Inventors: Kouichirou NISHIMURA, Tatsuro IDE
  • Patent number: 9013972
    Abstract: Disclosed is an optical information recording and reproducing device capable of recording an interference fringe pattern as a hologram in an optical information recording medium, the interference fringe pattern being formed by a signal beam superimposed with signal information and a reference beam, and also capable of reproducing the signal information from the optical information recording medium, the device having a light source unit to emit light, a light splitting unit to split the light into the reference beam and the signal beam, a spatial light modulation unit to superimpose the signal information on the signal light, and a light detection unit to detect an image reproduced by the reference beam, wherein information about defects on the spatial light modulation unit is recorded in the optical information recording medium.
    Type: Grant
    Filed: May 24, 2013
    Date of Patent: April 21, 2015
    Assignee: Hitachi Consumer Electronics Co., Ltd.
    Inventors: Taku Hoshizawa, Yusuke Nakamura
  • Patent number: 8995245
    Abstract: The above-described problem can be solved by the following optical-information reproducing apparatus: An optical-information reproducing apparatus for reproducing a hologram storage medium into which an interference pattern is recorded as a hologram, the interference pattern being formed by causing a reference beam and a signal beam to interfere with each other, the optical-information reproducing apparatus, including an optical detector for detecting a reproduced beam, the reproduced beam being acquired by illuminating the recorded hologram with the reference beam, an optical element for generating a first reference beam and a second reference beam by branching the reference beam, a wavefront detector for detecting wavefront aberration of the reference beam by causing the first reference beam and the second reference beam to interfere with each other, and a wavefront compensator for compensating the wavefront of the reference beam, wherein the wavefront compensator is adjusted based on an output of the wavef
    Type: Grant
    Filed: November 13, 2012
    Date of Patent: March 31, 2015
    Assignee: Hitachi Consumer Electronics Co., Ltd.
    Inventors: Yusuke Nakamura, Toshiki Ishii
  • Publication number: 20150085633
    Abstract: An optical information recording apparatus configured to record information into an information recording medium by using holography, the apparatus including: a signal generation unit configured to generate two-dimensional data; and a two-dimensional spatial light modulator unit configured to display the two-dimensional data and to spatially modulate a transmitted or reflected beam, wherein the two-dimensional spatial light modulator unit includes a signal region and an external region, the signal region displays two-dimensional data based on user data, the external region displays two-dimensional data not including the user data, and the signal generation unit generates two-dimensional data in such a manner that a frequency of the two-dimensional data displayed on the external region becomes equal to or larger than a frequency of the two-dimensional data displayed on the signal region.
    Type: Application
    Filed: August 6, 2014
    Publication date: March 26, 2015
    Inventors: Atsushi NEO, Junya IIZUKA, Yusuke NAKAMURA, Kazuyuki TAJIMA
  • Publication number: 20150078149
    Abstract: An optical information reproducing device includes: a light source that emits light to the optical information recording medium; a light source control unit that controls a wavelength of the light emitted from the light source; a reference beam angle control unit that controls an incidence angle of the reference beam to the optical information recording medium; a light detector that detects a reproduction image from the optical information recording medium or a brightness distribution of the reproduction image; a reproduction image processing unit that detects a bright line of the reproduction image on the basis of a detection result of the light detector and outputs a detection result of the bright line; and a controller that controls the wavelength of the light emitted from the light source, on the basis of an output of the reproduction image processing unit, and controls the incidence angle of the reference beam.
    Type: Application
    Filed: August 15, 2014
    Publication date: March 19, 2015
    Inventors: Masanobu SHIGAKI, Motoyuki SUZUKI
  • Patent number: 8982682
    Abstract: An information storage device has small compartments for storing information in a solid body and can be used as a memory medium. The solid body can have at least one pair of parallel planar portions on its surface. The information is divided into bits and stored in discrete minute areas that are distributed three-dimensionally inside the memory medium. The data can be converted into a digital format for storage to regulate the number of ‘1s’ recorded in a direction of the memory medium.
    Type: Grant
    Filed: January 14, 2013
    Date of Patent: March 17, 2015
    Assignee: Hitachi, Ltd.
    Inventors: Takao Watanabe, Toshimichi Shintani
  • Publication number: 20150071046
    Abstract: A component comprising a stacked interleaved film structure that includes a plurality of layers inert to light. Alternating layers are either doped with a reverse saturable absorber (RSA) material or the RSA material is located between the adjacent inert layers. In some embodiments, the inert alternating layers have different refractive indices. A data storage device and methods of manufacture are also disclosed.
    Type: Application
    Filed: November 17, 2014
    Publication date: March 12, 2015
    Inventors: Eugene Pauling Boden, Xiaolei Shi
  • Patent number: 8976638
    Abstract: Provided is an information encoding method and a holographic memory device which increase the amount of information per page of a holographic memory and reduce the bit error rate to ensure a larger multiplexing number. The holographic memory information encoding method expresses information of signal page data in a holographic memory as a multi-stage data using different resolution by block coding, and superimposes each data on a single page of signal page data. The multi-stage data using different resolution is realized by light amplitude data and phase data. The amplitude data is divided by area through block coding. When n odd-numbered ON bits exist in a divided area of the phase data, a phase of 2?s/n (where n and s are natural numbers) is imparted as s-th phase information to one value of binary data, and the same phase is imparted to the other value of binary data.
    Type: Grant
    Filed: August 15, 2012
    Date of Patent: March 10, 2015
    Assignee: National University Corporation Kobe University
    Inventor: Osamu Matoba
  • Publication number: 20150063089
    Abstract: This invention relates a method of six-dimensional optical multilayer storage using two-photon absorption writing, erasing and optical coherence tomography reading and the apparatus designed based on this method. The invented system stores data in three spatial dimensions plus three physical dimensions of wavelength, intensity and polarization. It has large storage capacity of over 32 Tbytes per DVD sized disk and ultrafast reading speed of over 25 Gbits/s with high signal-to-noise ratio of over 76 dB. The larger capacity of over 1 Pbyte per disk is potential. Furthermore, the invented system has relatively simple optical structure, easy light manipulation for addressing the storage cell and high compatibility with the CDs and DVDs. It is an actually practicable optical large capacity storage technology.
    Type: Application
    Filed: July 22, 2014
    Publication date: March 5, 2015
    Inventor: Shangqing Liu
  • Patent number: 8964518
    Abstract: A data recording apparatus and method using three dimensional (3D) optical memory and an authentication apparatus and method using 3D optical memory are provided. The data recording apparatus includes a recording excitation light splitting unit, a condition storage unit, and a data recording unit. The recording excitation light splitting unit splits recording excitation light into first split light and second split light. The condition storage unit stores recording conditions including information about the waveforms, wavelengths and phases of the split light and information about an arrangement of reflection mirrors configured to reflect the split light. The data recording unit records storage data by making the split light incident on the 3D optical memory through the reflection mirrors under the recording conditions.
    Type: Grant
    Filed: November 27, 2013
    Date of Patent: February 24, 2015
    Assignee: Electronics and Telecommunications Research Institute
    Inventor: CheolYong Park
  • Patent number: 8964517
    Abstract: An optical system capable of obtaining a high-resolution image using interference and thus capable of providing a stable signal is realized. A particular polarization state of response light emitted from an object is selected, and light in the selected particular polarization state is split into two beams. The split two beams are polarized into two different polarization states. After one of the two beams is subjected to an image inversion, the two beams are condensed such that they interfere with each other. The interfering light is split into a plurality of beams, and each of these beams is detected after they are passed through different polarizing filters. Detected signals are combined together and processed to obtain high-stability amplitude information without being influenced by a phase difference between the two beams.
    Type: Grant
    Filed: January 6, 2012
    Date of Patent: February 24, 2015
    Assignee: Hitachi, Ltd.
    Inventor: Shigeharu Kimura
  • Patent number: 8964519
    Abstract: The present invention provides a technology which estimates the most suitable cure time which changes with the environment when recording a hologram and adjusts the cure time in real time, thereby enabling a suitable pre-cure or post-cure. When irradiating an optical information recording medium with cure light, the light transmitted from the optical information recording medium is detected by a detector and the irradiation time is adjusted by continuing irradiation until the intensity of the transmitted light detected exceeds a prescribed reference value.
    Type: Grant
    Filed: April 16, 2012
    Date of Patent: February 24, 2015
    Assignee: Hitachi Consumer Electronics Co., Ltd.
    Inventor: Makoto Hosaka
  • Patent number: 8947991
    Abstract: A method of calculating a reliability effective in a decoding process of hologram. An optical information reproducing apparatus that reproduces information with the use of the holography includes an image acquisition unit that reproduces two-dimensional data from a hologram disc, an image equalization unit that makes the two-dimensional data equal to target data having a target PR characteristic, a soft output decoding unit that decodes output data of the image equalization unit on the basis of the PR characteristic, and outputs a decoded result having a reliability, and an error correction unit that conducts an error correction of the data on the basis of the decoded result.
    Type: Grant
    Filed: April 19, 2012
    Date of Patent: February 3, 2015
    Assignee: Hitachi Consumer Electronics Co., Ltd.
    Inventors: Yusuke Nakamura, Hajime Ishihara
  • Patent number: 8937855
    Abstract: A holographic optical pickup device includes an optical axis split element for splitting a reference beam into two light beams in different propagation directions having polarized states substantially orthogonal to each other, angular variable elements for changing incident angle of the reference beam for irradiating an optical information recording medium, an image sensor for detecting a diffracted beam generated from a recorded region upon irradiation of the optical information recording medium with the reference beam to form a reproduction signal, and photodetectors for detecting the diffracted beam generated from the recorded region upon irradiation of the optical information recording medium with the reference beam. An angular error signal is generated for controlling the angular variable element using signals detected by the photodetectors.
    Type: Grant
    Filed: June 19, 2013
    Date of Patent: January 20, 2015
    Assignee: Hitachi Media Electronics Co., Ltd.
    Inventors: Kazuyoshi Yamazaki, Ken-ichi Shimada
  • Patent number: 8908487
    Abstract: In reproduction of a two-dimensional page data from an optical information recording medium utilizing holography, a reproduced two-dimensional page data is divided into a plurality of areas each of which has a predetermined size, the divided two-dimensional areas are individually subjected to adaptive equalizing, and then are coupled to restore the condition of the original two-dimensional page data.
    Type: Grant
    Filed: November 29, 2011
    Date of Patent: December 9, 2014
    Assignee: Hitachi Consumer Electronics Co., Ltd.
    Inventors: Makoto Hosaka, Toshiki Ishii
  • Patent number: 8897110
    Abstract: The present invention provides a recording medium reproducing method comprising the steps of: irradiating light onto a recording medium, the recording medium including a data image and a reference pattern, the reference pattern being divided by a plurality of fractional regions, the fractional regions being in invert, rotational and symmetrical relationship; determining information associated to data-image distortion based on the reference pattern; and correcting position of the data image based on the information relating to data-image distortion.
    Type: Grant
    Filed: April 30, 2009
    Date of Patent: November 25, 2014
    Assignee: LG Electronics Inc.
    Inventor: Jae Sung Lee