Spatial, Phase Or Amplitude Modulation Patents (Class 359/11)
  • Patent number: 12011999
    Abstract: A method for holographic display calibration using phase modulation includes projecting an initial graphic on a windshield of a vehicle, capturing an image of the initial graphic with a camera inside a vehicle, determining a loss function value between the image of the initial graphic captured by the camera and a target graphic, modulating a phase of a light beam generating the initial graphic using the loss function value to generate an updated graphic, and displaying the updated graphic on the windshield of the vehicle.
    Type: Grant
    Filed: July 25, 2022
    Date of Patent: June 18, 2024
    Inventors: Manoj Sharma, Kai-Han Chang, Thomas A. Seder
  • Patent number: 11980065
    Abstract: A display panel and a display device are provided in the present disclosure. The display panel includes a base substrate; an array layer, on a side of the base substrate; a plurality of light-emitting units, on a side of the array layer away from the base substrate, where a light-emitting unit of the plurality of light-emitting units includes a first electrode, a light-emitting layer, and a second electrode which are sequentially disposed away from the base substrate; a pixel defining layer, on the side of the array layer away from the base substrate, where the pixel defining layer includes a plurality of pixel openings, the plurality of pixel openings correspond to the plurality of light-emitting units, and a projection of the light-emitting layer on the pixel defining layer is within a pixel opening; and a first metal part between the array layer and the first electrode.
    Type: Grant
    Filed: November 11, 2021
    Date of Patent: May 7, 2024
    Assignee: Xiamen Tianma Display Technology Co., Ltd.
    Inventor: Zhoulin Ke
  • Patent number: 11841683
    Abstract: A hologram for an illumination device for vehicles and a corresponding illumination device are provided. The hologram has a plurality of holographic structures designed for a respectively associated wavelength, wherein the holographic structures have diffraction properties that are identical among one another.
    Type: Grant
    Filed: July 4, 2019
    Date of Patent: December 12, 2023
    Assignee: Carl Zeiss Jena GmbH
    Inventor: Daniel Thomae
  • Patent number: 11656494
    Abstract: A device for combining light beams which interact with adjacently arranged pixels of a light modulator, having a beam splitting component, a beam combining component, and a beam superposition component. The beam splitting component is configured such that incident light beams are split into a first subbeam and a second subbeam so that the first subbeam propagates toward a first pixel of the light modulator and the second subbeam propagates toward a second pixel of the light modulator. The beam combining component is configured and arranged so that the first subbeam and the second subbeam are combined after interaction with pixels of the light modulator. The beam splitting component and the beam combining component are configured and arranged in such a way that a sum of optical path lengths of the first subbeam and the second subbeam is respectively constant for different angles of incidence.
    Type: Grant
    Filed: December 21, 2020
    Date of Patent: May 23, 2023
    Inventors: Norbert Leister, Stephan Reichelt
  • Patent number: 11567451
    Abstract: A holographic display apparatus capable of providing an expanded viewing window and a display method are provided. The holographic display apparatus includes an image processor configured to provide computer generated hologram (CGH) data to a spatial light modulator, wherein the image processor is further configured to generate a hologram data array comprising information of the holographic image to be reproduced at the first resolution or a resolution less than the first resolution, perform an off-axis phase computation on the hologram data array at the second resolution, and then, generate the CHG data at the first resolution.
    Type: Grant
    Filed: June 24, 2021
    Date of Patent: January 31, 2023
    Assignees: SAMSUNG ELECTRONICS CO., LTD., Korean University Research and Business Foundation, Sejong Campus
    Inventors: Hoon Song, Hwi Kim, Jungkwuen An, Hongseok Lee, Yunhee Kim, Chilsung Choi
  • Patent number: 11506891
    Abstract: A method operates a visual field display device, particularly for a motor vehicle, which includes an autostereoscopic planar pixel array for generating a projecting light beam containing a display content, and is designed to project this onto a partially transparent, reflective projection screen, particularly a front windscreen of the motor vehicle, in such a way that a virtual display image superimposed into a field of vision of a user is generated behind the screen. The method provides at least one surroundings parameter and/or user parameter, and switches between at least two qualitatively different 3D, 2D and/or monocular operating modes of the planar pixel array, depending on the surroundings parameters and/or user parameters provided, in order to adapt the virtual display image to qualitative operational changes relating to the surroundings and/or the user of the visual field display device.
    Type: Grant
    Filed: July 22, 2019
    Date of Patent: November 22, 2022
    Assignee: Bayerische Motoren Werke Aktiengesellschaft
    Inventor: Wolfgang-Andreas Huber
  • Patent number: 11302358
    Abstract: The present invention relates to a holographic data storage device with a single-arm structure, and belongs to the technical field of optical holographic storage. According to the device disclosed in the present invention, a part of a reference arm and a part of a signal arm are integrated together to form a single-arm structure, which can not only reduce the number of optical and mechanical elements, but also reduce the system volume and cost without degrading performance. In addition, a signal beam and a reference beam share the same relay lens, so that the impact of environmental interference on the two beams is equal, and the stability of the entire system is improved.
    Type: Grant
    Filed: December 28, 2020
    Date of Patent: April 12, 2022
    Assignee: Amethystum Storage Technology Co., Ltd.
    Inventors: Mu Zheng, Tiewei Luo, Jun Tian, Dejiao Hu, Yicheng Liu
  • Patent number: 11281160
    Abstract: A system for making a holographic medium for use in generating light patterns for eye tracking includes a light source configured to provide light and a beam splitter configured to separate the light into a first portion of the light and a second portion of the light that is spatially separated from the first portion of the light. The system also includes a first set of optical elements configured to transmit the first portion of the light for providing a first wide-field beam onto an optically recordable medium and a plurality of optical fibers configured to receive the second portion of the light and project a plurality of separate light patterns onto the optically recordable medium for forming the holographic medium.
    Type: Grant
    Filed: December 17, 2018
    Date of Patent: March 22, 2022
    Inventors: Ganghun Kim, Andrew Maimone, Alexander Jobe Fix, Robert Dale Cavin, Hee Yoon Lee, Matthieu Charles Raoul Leibovici, Brian Wheelwright, Douglas Robert Lanman
  • Patent number: 11169310
    Abstract: An optical element includes an electro-optic crystal having an isotropic crystal which belongs to a point group m3m of a cubic system and including an input surface to which input light is input and a rear surface which is a surface on the opposite side of the input surface; a first electrode disposed on the input surface; and a second electrode disposed on the rear surface. The input surface is located along at least one axis between axes obtained by rotating two crystal axes about one remaining crystal axis used as a rotation center at a predetermined angle in three crystal axes of the electro-optic crystal. A direction of an electric field to be induced by a voltage applied to a part between the first electrode and the second electrode is set in a propagation direction of the input light.
    Type: Grant
    Filed: June 5, 2017
    Date of Patent: November 9, 2021
    Inventors: Kuniharu Takizawa, Hiroshi Tanaka, Haruyoshi Toyoda, Yasushi Ohbayashi, Hiroto Sakai
  • Patent number: 11163172
    Abstract: The present application relates to an optical isolation device. The present application provides an optical isolation device having a high transmittance in a forward direction and an excellent isolation ratio. Such an optical isolation device can be applied to various applications such as the field of optical communication or laser optics, the field of security or privacy protection, brightness enhancement of displays, or a use for hiding and covering.
    Type: Grant
    Filed: October 13, 2017
    Date of Patent: November 2, 2021
    Inventors: Seong Min Park, Sang Choll Han, Jae Jin Kim
  • Patent number: 11137289
    Abstract: A system may include an optical source and an adjustable spatial light modulator coupled to the optical source. The system may further include a medium coupled to the adjustable spatial light modulator. The system may further include a beam splitter coupled to the optical source and the adjustable spatial light modulator. The beam splitter may generate a first optical signal and a second optical signal using the optical source. The system may further include an optical detector coupled to the beam splitter and the medium. The optical detector may obtain a combined optical signal including a resulting optical signal and the second optical signal. The resulting optical signal may be produced by transmitting the first optical signal through the medium at a predetermined spatial light modulation using the adjustable spatial light modulator.
    Type: Grant
    Filed: March 11, 2020
    Date of Patent: October 5, 2021
    Assignee: LightOn
    Inventors: Iacopo Poli, Julien Launay, Kilian Müller, Gustave Pariente, Igor Carron, Laurent Daudet
  • Patent number: 11073794
    Abstract: A holographic display apparatus capable of providing an expanded viewing window and a display method are provided. The holographic display apparatus includes an image processor configured to provide computer generated hologram (CGH) data to a spatial light modulator, wherein the image processor is further configured to generate a hologram data array comprising information of the holographic image to be reproduced at the first resolution or a resolution less than the first resolution, perform an off-axis phase computation on the hologram data array at the second resolution, and then, generate the CHG data at the first resolution.
    Type: Grant
    Filed: January 2, 2020
    Date of Patent: July 27, 2021
    Assignees: SAMSUNG ELECTRONICS CO., LTD., Korea University Research and Business Foundation, Sejong Campus
    Inventors: Hoon Song, Hwi Kim, Jungkwuen An, Hongseok Lee, Yunhee Kim, Chilsung Choi
  • Patent number: 11067952
    Abstract: Disclosed is a method for digitally generating a hologram in a screen plane of a hologram display device, including: obtaining intensity and depth maps of the scene corresponding to user viewpoint; projecting the points of the intensity map on planes parallel to the screen plane in a reference frame of the screen, one plane associated with one depth value of between minimum and maximum values of the depth map, a point of the intensity map projected on the plane of the planes associated with the depth value of the point in the depth map; compensating for distortion by modifying the planes of the scene, a point of one plane, called image point of an object point by conjugation of the convergent lens, being replaced by the object point; from the modified planes, propagating a complex sampled light wave to the screen plane and summation of the propagated light waves.
    Type: Grant
    Filed: June 13, 2018
    Date of Patent: July 20, 2021
    Assignee: FONDATION B-COM
    Inventors: Antonin Gilles, Patrick Gioia
  • Patent number: 10852534
    Abstract: Imaging devices and mirror assemblies for imaging devices are provided. The mirror assemblies include a first portion having a first cut face and formed of a transparent material, a second portion having a second cut face and formed of the transparent material, wherein the second cut face is assembled to the first cut face form a main body, and at least one reflective surface positioned between the first and second cut faces.
    Type: Grant
    Filed: April 26, 2018
    Date of Patent: December 1, 2020
    Inventors: Matthias Scholl, Christoph Neundorf
  • Patent number: 10775739
    Abstract: Disclosed is a coherence-adjustable digital holography system. More particularly, the coherence-adjustable digital holography system includes a light source part for generating low-interference light; a dispersion part for dispersing the generated light, an adjustment part for adjusting coherence by adjusting a spectrum bandwidth of the light which has passed through the dispersion part; and a detection part for detecting a holographic image of a subject from the adjusted light. In accordance with such a configuration, an interference fringe may be easily obtained through coherence adjustment, whereby the accuracy of a detected holographic image may be improved.
    Type: Grant
    Filed: June 27, 2017
    Date of Patent: September 15, 2020
    Inventors: No Cheol Park, Jang Hyun Cho, Sung Bin Jeon, Ji Nan Jin
  • Patent number: 10642060
    Abstract: A holographic display panel, a holographic display device, and a holographic display method are disclosed. The holographic display panel includes a plurality of sub-pixels arranged in an array and a phase plate disposed on a light exit side of the plurality of sub-pixels; and a blocking member disposed between the plurality of sub-pixels and the phase plate; an orthogonal projection of the blocking member on a plane where the plurality of sub-pixels are located is arranged between adjacent sub-pixels for blocking an edge portion of a light beam diffracted by the sub-pixel.
    Type: Grant
    Filed: November 10, 2017
    Date of Patent: May 5, 2020
    Inventor: Jifeng Tan
  • Patent number: 10592194
    Abstract: A method begins by a computing device obtaining a visual file for display, determining to display the visual file in an expanded manner and determining a number of monitors associated with the computing device. The method continues by determining a display window space that extends beyond a display area of at least one monitor. The method continues by determining a first display region of the display window space attributed to the number of monitors within and determining a second display region of the display window space that is outside of the first display region. The method continues by mapping a first and section portion of the visual file to the first and second display regions to produce a first and second visual mapping. The method continues by rendering at least a portion of the visual file onto the display window space in accordance with the first and second visual mappings.
    Type: Grant
    Filed: April 20, 2018
    Date of Patent: March 17, 2020
    Assignee: International Business Machines Corporation
    Inventors: Sarbajit K. Rakshit, Martin G. Keen, James E. Bostick, John M. Ganci, Jr.
  • Patent number: 10420108
    Abstract: A method includes receiving a first optical signal at a first communication terminal from a second communication terminal through a free space optical link. The received optical signal contains a modulated unique frequency tone. The method also includes mixing the modulated unique frequency tone with a reference signal to provide a mixed output signal and determining a signal strength of the modulated unique frequency tone based on the mixed output signal. The reference signal includes a same frequency as the modulated unique frequency tone. The method adjusts an optical head of the first communication terminal to establish acquisition and optical beam pointing with the second communication terminal based on the signal strength of the modulated unique frequency tone received from the second communication terminal.
    Type: Grant
    Filed: June 27, 2018
    Date of Patent: September 17, 2019
    Inventors: Chiachi Wang, Sheng-Hui Yang, Romain Clement, Michael Sholl
  • Patent number: 10365606
    Abstract: A digital holography microscope, a method, and a system are provided. The digital holography microscope comprising two microscope objectives configured in a bi-telecentric configuration; a sample holder configured to receive a sample; a couple charged device configured to capture one or more images; a display; and a processor configured to retrieve a Convolutional Neural Network (CNN) model associated with a type of the sample, mitigate aberrations in the one or more images using at least the CNN model having as input an unwrapped phase associated with each of the one or more images, and output the mitigated one or more images via the display.
    Type: Grant
    Filed: April 7, 2018
    Date of Patent: July 30, 2019
    Inventors: Thanh Nguyen, George Nehmetallah, Vy Bui
  • Patent number: 10248081
    Abstract: A holographic display includes a pixel array including one or more pixels, a holographic data source, a drive array, and a light source. Each pixel includes a phase-modulating structure and an amplitude-modulating structure. The holographic data source is configured to supply a holographic drive signal. The holographic drive signal includes, for each pixel in each of a plurality of time-varying holographic image frames, a phase component defining phase modulation for the pixel and an amplitude component defining amplitude modulation for the pixel. The drive array is configured to, for each pixel in each holographic image frame, modulate the phase-modulating structure according to the phase component and modulate the amplitude-modulating structure according to the amplitude component. The light source is configured to output coherent light to illuminate the one or more pixels of the pixel array.
    Type: Grant
    Filed: March 10, 2017
    Date of Patent: April 2, 2019
    Inventors: Andreas Georgiou, Adrian Travis
  • Patent number: 10162086
    Abstract: An image decoding system provides a phase pattern encoding a target image. A spatial light modulator is configured to emit a wavefront-shaped light signal based on the phase pattern. A first diffusive medium receives the wavefront-shaped light signal and emits a decoded scattered light signal of the target image. The target image is previously encoded in the phase pattern by transmitting another wavefront-shaped light signal shaped by a training phase pattern through a second diffusive medium to yield a scattered light signal encoding a test image. The second diffusive medium has the optical scattering characteristics of a first diffusive medium. The scattered light signal encoding the test image is emitted from the second diffusive medium and recorded. The training phase pattern is adjusted for successive iterations of the test image until the test image satisfies a compensation condition. The resulting training phase pattern yields the phase pattern.
    Type: Grant
    Filed: June 21, 2016
    Date of Patent: December 25, 2018
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Jiandong Huang, Rostislav Boltyanskiy
  • Patent number: 10146053
    Abstract: Near-eye display devices having angularly multiplexed holograms are disclosed. One example includes an image source, a waveguide, and a controller. The waveguide is configured to propagate light received the image source to a user of the near-eye display device, and includes a holographic grating including a plurality of angularly multiplexed holograms. The controller is configured to control display of an image via the image source.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: December 4, 2018
    Inventors: Sheng Yuan, Ian Nguyen, Steve Robbins, David D. Bohn
  • Patent number: 9984717
    Abstract: The optical information recording device includes a light source configured to emit a laser beam, an optical element configured to divide the laser beam into the reference beam and the signal beam, an angle control unit configured to control an angle of incidence of the reference beam on the optical information recording medium, and a phase control unit configured to control a phase of at least one of the signal beam and the reference beam in a recording period, wherein the angle control unit controls an angle interval so that a position of a 1st null of an adjacent page of the signal beam is fixed, and wherein the phase control unit controls the phase of the signal beam or the reference beam so that a phase difference between the adjacent pages is a predetermined value.
    Type: Grant
    Filed: January 4, 2017
    Date of Patent: May 29, 2018
    Assignee: Hitachi-LG Data Storage, Inc.
    Inventors: Toshiki Ishii, Makoto Hosaka
  • Patent number: 9698567
    Abstract: A wavelength-selectable laser device providing spatially-selectable wavelength(s) may be used to select one or more wavelengths for lasing in a tunable transmitter or transceiver, for example, in a wavelength division multiplexed (WDM) optical system such as a WDM passive optical network (PON). The wavelength-selectable laser device uses a dispersive optical element, such as a diffraction grating, to disperse light emitted from a laser emitter and to direct different wavelengths of the light toward a reflector at different spatial positions such that the wavelengths may be selected by allowing light to be reflected from selected spatial position(s) back into the laser emitter. Thus, the reflected light with a wavelength at the selected spatial position(s) is allowed to complete the laser cavity.
    Type: Grant
    Filed: January 24, 2012
    Date of Patent: July 4, 2017
    Assignee: Applied Optoelectronics, Inc.
    Inventors: Jun Zheng, Stefan J. Murry, Bujin Guo
  • Patent number: 9581966
    Abstract: Systems and methods for three-dimensional imaging and viewing are disclosed. A method for generating a three-dimensional image may include producing a pattern in a spatial light modulator based on data representative of an image of an object, illuminating the spatial light modulator so as to yield a projection beam, masking at least one portion of the projection beam such that a portion of the projection beam is selected, and propagating the selected portion to an exit pupil so as to form a virtual 3-D image of the object when viewed at the exit pupil. An apparatus may include a projector comprising a spatial light modulator array that modulates the phase of light to produce a phase modulated beam that is projected to a viewer thereby forming a 3-D image of the object when viewed by the viewer, and processing electronics configured to extract phase information from a signal.
    Type: Grant
    Filed: February 14, 2013
    Date of Patent: February 28, 2017
    Assignee: Integrity Applications Incorporated
    Inventor: James A. Georges, III
  • Patent number: 9501036
    Abstract: A holographic display and more particularly an apparatus and method for a curved electro-holographic display are disclosed. The apparatus mainly includes at least one light source for providing lights, at least one axially symmetric mirror for reflecting the lights coming from the light source, at least one spatial light modulation system having one or more than one spatial light modulators for modulating the lights reflecting from the axially symmetric mirror and forming a desired optical reconstruction above the axially symmetric mirror by reflecting the lights which is seen from a viewing zone by the user.
    Type: Grant
    Filed: January 14, 2011
    Date of Patent: November 22, 2016
    Inventors: Hoonjong Kang, Fahri Yaras, Levent Onural
  • Patent number: 9476698
    Abstract: A method and system to measure misalignment error between two overlying or interlaced periodic structures are proposed. The overlying or interlaced periodic structures are illuminated by incident radiation, and the diffracted radiation of the incident radiation by the overlying or interlaced periodic structures are detected to provide an output signal. The misalignment between the overlying or interlaced periodic structures may then be determined from the output signal.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: October 25, 2016
    Assignee: KLA-Tencor Corporation
    Inventors: Ibrahim Abdulhalim, Mike Adel, Michael Friedmann, Michael Faeyrman
  • Patent number: 9442459
    Abstract: Method of Fast Fourier Transform (FFT) Analysis for collecting waveforms and other vibrational intelligence and modulating or embedding same into one or more coherent reference beams of an n-dimensional holographic recording device for producing one or more holograms of objects, including singularity points in space. The result provides wholesale differentiation of waveforms distinguishable from others based on their spectral characteristics. When said holograms are presented with reference beams of vibrational waveforms having similar characteristics to those which were present during recording of the original objects, phantoms of the original objects or subjects will reconstruct themselves in space with an energy glow of intensity that varies thusly with the degree of similarity between the waveform modulations of the reconstructing wavefronts and those of that same which were used to originally record said objects. Said n-dimensional description space can be sampled of the said glowing phantoms.
    Type: Grant
    Filed: July 15, 2013
    Date of Patent: September 13, 2016
    Inventors: Eric John Dluhos, Bradley Lloyd Wilk
  • Patent number: 9240143
    Abstract: A display driving system for an electrowetting display device having at least one display element, the display driving system comprising a driver stage for the display element, the driver stage providing a display voltage to be applied to the display element in response to a data signal representing an image to be displayed, the driver stage including a variable source providing a variable voltage in dependence on the data signal, the display driving system including an offset source providing an offset voltage, the display voltage being the sum of the offset voltage and the variable voltage.
    Type: Grant
    Filed: December 18, 2012
    Date of Patent: January 19, 2016
    Assignee: Amazon Technologies, Inc.
    Inventors: Jo Aubert, Henricus Petronella Maria Derckx
  • Patent number: 9179841
    Abstract: The invention utilizes a digital holographic adaptive optics (DHAO) system to replace hardware components in a conventional AO system with numerical processing for wavefront measurement and compensation of aberration by the principles of digital holography. Wavefront sensing and correction by DHAO have almost the full resolution of a CCD camera. The approach is inherently faster than conventional AO because it does not involve feedback and iteration, and the dynamic range of deformation measurement is essentially unlimited. The new aberration correction system can be incorporated into a conventional fundus camera with minor modification and achieve high resolution imaging of a retinal cone mosaic. It can generate profiles of the retinal vasculature and measure blood flow. It can also provide real-time profiles of ocular aberration during refractive (Lasik) surgery and generate three-dimensional maps of intraocular debris.
    Type: Grant
    Filed: May 24, 2013
    Date of Patent: November 10, 2015
    Inventor: Myung K. Kim
  • Patent number: 9105280
    Abstract: In a holographic memory of an angle multiple recording system, when a hologram is reproduced, a light beam of a different polarizing direction is irradiated as reference light to a hologram recording medium and diffracted light is detected from the hologram recording medium.
    Type: Grant
    Filed: April 13, 2011
    Date of Patent: August 11, 2015
    Assignee: Hitachi Consumer Electronics Co., Ltd.
    Inventors: Kenichi Shimada, Toshiki Ishii, Motoyuki Suzuki
  • Patent number: 9039188
    Abstract: Provided is an illumination device which illuminates an illuminated zone with a plurality of coherent light beams having mutually different wavelength ranges, so that it is possible to allow speckles to be inconspicuous. A illumination device is configured to include an optical element including a hologram recording medium and an irradiation device which illuminates the optical element with a plurality of coherent light beams having mutually different wavelength ranges so as to allow a first and second coherent light beams having different wavelength ranges to scan the hologram recording medium of the optical element. The first coherent light beams incident on respective positions of the hologram recording medium are allowed to reproduce an image superimposed on an illuminated zone, and the second coherent light beams incident on the respective positions of the hologram recording medium are allowed to reproduce an image superimposed on the illuminated zone.
    Type: Grant
    Filed: September 8, 2011
    Date of Patent: May 26, 2015
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Tomoe Takanokura, Kazutoshi Ishida, Makio Kurashige, Yasuyuki Ooyagi
  • Patent number: 9025881
    Abstract: An intensity image is collected at each of a plurality of locations spaced apart in a propagation direction of a light beam. Information from the intensity images is combined using a Kalman filter which assumes that at least one co-variance matrix has a diagonal form. This leads to considerable reduction in computational complexity. An augmented Kalman filter model (augmented space state model) is used in place of the standard Kalman filter model. The augmented Kalman filter improves the robustness to noise.
    Type: Grant
    Filed: February 6, 2013
    Date of Patent: May 5, 2015
    Assignee: Nanyang Technological University
    Inventors: Justin Dauwels, Jingshan Zhong
  • Patent number: 9025226
    Abstract: A holographic structure, system and method project a grey-scale image in a narrow IR spectral band that is related to a broadband thermal signature of an object. The projected grey-scale image, when integrated over the broadband, forms either a decoy that approximates the thermal signature of the object or a mask that obscures the thermal signature of the object. The projected image is a tuned phase recording of a desired far field projection. In different embodiments, the projected image is a “positive” or a “negative” image of the object's thermal signature, a difference image between the thermal signatures of a false object and the object or a camouflage image of random features having approximately the same spatial frequency as the object's thermal signature. The goal being to confuse or fool, even for a short period of time, the warfighting or surveillance system or human observer that uses a broadband IR sensor to acquire and view thermal images of the scene.
    Type: Grant
    Filed: May 28, 2013
    Date of Patent: May 5, 2015
    Assignee: Raytheon Company
    Inventors: Rigel Quinn Woida-O'Brien, Stephanie Barnes
  • Patent number: 8995037
    Abstract: Holographic display apparatuses are provided. The holographic display apparatus may include a light source module generating coherent light, at least two input optical systems converging the light generated from the light source module on at least two converging points, an output optical system mixing the lights provided from the at least two input optical systems to provide a hologram image, and a spatial light modulating module modulating the light.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: March 31, 2015
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Byung Gyu Chae, Joonku Hahn, Hwi Kim
  • Publication number: 20150077820
    Abstract: An aperture forming member is provided on a light path from a laser light source to a collimator lens, and a plurality of apertures are formed by a plurality of wall bodies of the aperture forming member. The distances between the apertures and the outer surface of an effective beam decrease in the order of L1, L2, and L3. By providing the plurality of apertures, entrance of stray light into a phase conversion array can be prevented.
    Type: Application
    Filed: September 12, 2014
    Publication date: March 19, 2015
  • Patent number: 8976433
    Abstract: An apparatus includes a low-coherent light source configured to emit an electromagnetic wave; a spatial light modulator configured to modulate a wavefront of the electromagnetic wave; an interferometer including a movable mirror to set a depth of a medium to be irradiated by the electromagnetic wave and a beam splitter configured to the electromagnetic wave into a reference beam and an object beam; a detector to detect information about an interference pattern formed by the object beam coming from the medium via the beam splitter and the reference beam reflected by the movable mirror; and a controller configured to control the spatial light modulator, based on the information, to form a modulated wavefront for irradiating the medium.
    Type: Grant
    Filed: December 16, 2011
    Date of Patent: March 10, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takahiro Masumura
  • Patent number: 8908824
    Abstract: An imaging apparatus includes, a diffraction grating that diffracts an electromagnetic wave emitted from an electromagnetic wave source, a shield grating including a shield portion that prevents transmission of the electromagnetic wave and a plurality of transmission portions that allows the electromagnetic wave to transmit therethrough, and a detector that detects the electromagnetic wave transmitted through the transmission portions of the shield grating. The diffraction grating forms an interference pattern in a grid pattern by diffracting the electromagnetic wave; the shield grating has the plurality of transmission portions arranged two-dimensionally; and a ratio of an area of the transmission portion to the area of a unit pattern composed of a portion of the shield portion and one transmission portion of the plurality of transmission portions is larger than 0.25.
    Type: Grant
    Filed: October 12, 2011
    Date of Patent: December 9, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takeshi Kondoh
  • Patent number: 8908249
    Abstract: A method of manufacturing a master for producing a hologram device is provided. The holographic image reconstructs when the photosensitive film of the hologram device is struck by a beam of light from a wide angle being defined relative to a perpendicular line to a surface of the photosensitive film.
    Type: Grant
    Filed: August 13, 2010
    Date of Patent: December 9, 2014
    Assignee: Claudelli Productions, Inc
    Inventors: Joseph J. Ciaudelli, Thomas Cvetkovich
  • Patent number: 8903207
    Abstract: A Head Up Display can be utilized to find light from an energy source. The Head Up Display includes a first waveguide having a first input coupler and a first output coupler. The Head Up Display can also include a second waveguide having a second input coupler and a second output coupler. The first waveguide has a first major surface and the second waveguide has a second major surface, which are disposed approximately parallel to each other. The first waveguide and the second waveguide are positioned as a combiner and allowing viewing an outside feed and information from an image source. The first input coupler diffracts light in the first field of view into the first waveguide and light in a second field of view reaches the second input coupler and is diffracted into the second waveguide.
    Type: Grant
    Filed: September 30, 2011
    Date of Patent: December 2, 2014
    Assignee: Rockwell Collins, Inc.
    Inventors: Robert D. Brown, Kurt A. Stahl, Robert B. Wood
  • Publication number: 20140347714
    Abstract: A method and apparatus for generating coherent light, and a display apparatus using coherent light are provided. A wide-angle coherent light generation apparatus may focus parallel light onto a focal point, and may generate coherent light at a wide angle, using an optical device.
    Type: Application
    Filed: May 19, 2014
    Publication date: November 27, 2014
    Inventors: Dong Kyung NAM, Ho Cheon WEY, Seok LEE
  • Patent number: 8891344
    Abstract: The invention combines several techniques applying high-resolution photosensitive emulsions for the long-term, archival storage of data, images and text. Data is stored as vertical interference patterns of multiple frequencies in a photographic emulsion. Read-out of the stored data uses a precision mechanism to locate and decode stored data.
    Type: Grant
    Filed: May 29, 2012
    Date of Patent: November 18, 2014
    Inventors: Eric Dean Rosenthal, Richard Jay Solomon, Clark Eugene Johnson
  • Publication number: 20140320942
    Abstract: An apparatus for producing a hologram includes a collimation lens configured to receive incoherent light emitted from an object; a spatial light modulator (SLM) that includes at least one diffractive lens which is configured to receive the incoherent light from the collimation lens and split the incoherent light into two beams that interfere with each other; and a camera configured to record the interference pattern of the two beams to create a hologram, wherein a ratio between a distance from the SLM to the camera and a focal length of the diffractive lens is greater than 1.
    Type: Application
    Filed: December 7, 2012
    Publication date: October 30, 2014
    Applicant: CELLOPTIC, INC.
    Inventors: Joseph Rosen, Gary Brooker, Nisan Siegel
  • Patent number: 8873120
    Abstract: A numerical method of recording a two or three dimensional object scene in a binary hologram. When the binary hologram is illuminated with a reference beam, the original object scene can be reconstructed and observed by a viewer. As the hologram is binary, i.e. composed of black or white pixels, it can be printed with commodity printers. The process is simple, fast, and economical, hence decreasing the cost and time for hologram design and production. In addition, with binary holograms, the ability to store the holograms is enhanced and binary holograms facilitate efficient transmission of the holograms.
    Type: Grant
    Filed: August 13, 2013
    Date of Patent: October 28, 2014
    Assignee: City University of Hong Kong
    Inventors: Wai Ming Tsang, Wai Keung Cheung
  • Patent number: 8848271
    Abstract: Described are a method and apparatus for high-speed phase shifting of an optical beam. A transparent plate having regions of different optical thickness is illuminated by an optical beam along a path of incidence that extends through the regions. The transparent plate can be moved or the optical beam can be steered to generate the path of incidence. The optical beam exiting the transparent plate has an instantaneous phase value according to the region in which the optical beam is incident. Advantageously, the phase values are repeatable and stable regardless of the location of incidence of the optical beam within the respective regions, and phase changes at high modulation rates are possible. The method and apparatus can be used to modulate a phase difference of a pair of coherent optical beams such as in an interferometric fringe projection system.
    Type: Grant
    Filed: February 27, 2014
    Date of Patent: September 30, 2014
    Assignee: Dimensional Photonics, Inc.
    Inventors: Robert F. Dillon, Neil H. K. Judell, Timothy I. Fillion, Gurpreet Singh, Nathan E. Wallace
  • Publication number: 20140210960
    Abstract: A complex spatial light modulator and a three-dimensional (3D) image display apparatus including the complex spatial light modulator are provided. The complex spatial light modulator includes: a spatial light modulator that modulates a phase of light; a prism array including a plurality of prism units, each of the plurality of prism units including a first prism surface and second prism surface, where light from the spatial light modulator is incident on the prism array; and a polarization-independent diffracting element that diffracts light that has passed through the prism array.
    Type: Application
    Filed: January 29, 2014
    Publication date: July 31, 2014
    Inventors: Gee-young SUNG, Hwi KIM, Hoon SONG, Kang-hee WON, Hong-seok LEE
  • Publication number: 20140204437
    Abstract: Systems and methods for dynamic aperture holographic multiplexing are disclosed. One example process may include recording a set of holograms in a recording medium by varying both the reference beam angular aperture and the signal beam angular aperture. The angular aperture of the signal beam may be dynamically changed such that the closest edge of each signal beam angular aperture is selected to be a threshold angle different than the angular aperture of the reference beam used to record it. In some examples, the dynamic aperture holographic multiplexing process may include dynamic aperture equalization to reduce cross-talk, to improve error correction parity distribution for improved recovery transfer rate, to provide multiple locus aperture sharing for increased recording density, and to provide polarization multiplexed shared aperture multiplexing for increased transfer rate in both recording and recovery.
    Type: Application
    Filed: May 1, 2013
    Publication date: July 24, 2014
    Inventors: Mark R. AYRES, Kenneth E. ANDERSON, Fredric R. ASKHAM, Bradley Jay SISSOM
  • Patent number: 8788022
    Abstract: There is provided a method and system for optical imaging of a light scattering object. The method comprises the detection of one or more time-gates of a temporal point spread function (TPSF) to be used to construct an image of optical properties of the object. The method also comprises the simultaneous detection of two or more selected time-gates using a time-gated camera. The method enables more efficient spatial-temporal acquisition of optical signals for imaging purposes.
    Type: Grant
    Filed: January 16, 2004
    Date of Patent: July 22, 2014
    Assignee: President and Fellows of Harvard College
    Inventor: David Jonathan Hall
  • Patent number: 8740391
    Abstract: The present invention concerns a projection system for providing a distributed manifestation within an environment. The projection system includes a data generator for generating a plurality of data sets of associated state data and spatial coordinate data. The projection system also includes a projector in communication with the data generator for receiving the data sets. The projector is provided with a signal generating module for generating a plurality of electromagnetic signals, and a projecting module for projecting each of the electromagnetic signals towards a target location within the environment. The projection system also includes a plurality of receiving units distributed within the environment, each receiving unit having a receiver for receiving one of the electromagnetic signals when the receiving unit is positioned in the corresponding target location, each receiving unit being adapted to perform a change of state in response to the state data.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: June 3, 2014
    Assignee: ESKI Inc.
    Inventors: Vincent Leclerc, Patrick Keroulas, Vincent de Belleval
  • Patent number: 8736933
    Abstract: A method produces colored individualized holograms for use as security elements for documents, and to a device for producing individualized holograms. The method generates light formed of different colors, spatially modulates the light, color by color, in an individual manner, optically guides the modulated light such that the light is at least partially refracted and/or reflected on a holographic master and is superposed in a holographic recording material with the modulated non-refracted and/or reflected light, and records the hologram. The light is modulated, color by color and at the same time, by a plurality of spatial light modulators. Every color is associated with its own spatial light modulator and a plurality of monochrome modulated light beams of the plurality of colors is combined in a collinear manner prior to refraction and/or reflection on the holographic master and the superposition in the recording material to give a multicolor exposure light beam.
    Type: Grant
    Filed: September 3, 2008
    Date of Patent: May 27, 2014
    Assignee: Bundesdruckerei GmbH
    Inventors: André Leopold, Christian Kunath, Jens Ehreke, Gerhard Hochenbleicher, Christian Klepzig, Michael Langgassner