Using Modulated Or Plural Reference Beams Patents (Class 359/10)
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Patent number: 12253684Abstract: An apparatus includes an optical circuit having at least one reconfigurable beamsplitter and is configured to receive a plurality of input optical modes in a Gaussian state and generate a plurality of output optical modes. The apparatus also includes at least one detector optically coupled with the optical circuit and configured to perform a non-Gaussian measurement of a first output optical mode from the plurality of output optical modes. The non-Gaussian measurement of the first output optical mode is configured to cause a second output optical mode from the plurality of output optical modes to be in a first non-Gaussian state. The apparatus also includes a controller operatively coupled to the optical circuit and configured to change a setting of the at least one reconfigurable beamsplitter to cause the second output optical mode from the plurality of output optical modes to be in a second non-Gaussian state.Type: GrantFiled: October 9, 2023Date of Patent: March 18, 2025Assignee: Xanadu Quantum Technologies Inc.Inventors: Krishnakumar Sabapathy, Haoyu Qi, Joshua Abe Izaac, Christian Weedbrook, Daiqin Su, Casey Myers
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Patent number: 12235608Abstract: A vehicle for projecting holograms is described. The vehicle may include a plurality of Integrated Holographic Camera Modules (IHCMs) configured to project movable holograms. The vehicle may further include a vehicle processor communicatively coupled to the plurality of IHCMs. The vehicle processor may obtain a recording of a movable hologram from a first IHCM and determine a hologram movement from the recording. The vehicle processor may further switch a projection of the movable hologram from the first IHCM to a second IHCM when a predefined criterion is met. The vehicle processor may determine that the predefined criterion is met when the projection moves from a first IHCM projection range to a second IHCM projection range.Type: GrantFiled: February 23, 2023Date of Patent: February 25, 2025Assignee: Ford Global Technologies, LLCInventors: Dmitry Ogorodnikov, Steven Chapekis
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Patent number: 12222679Abstract: A holographic wavefront printing system and method are provided. A two-dimension digital blazed grating is loaded on a phase hologram, and the emergent direction of active region diffracted light is adjusted to prevent overlapping with the dead region diffracted light after being Fourier transformed by a lens, and a phase spatial light modulator is inclined by a preset angle to change the emergent direction of the diffracted light, such that the dead region zeroth-order and first-order diffracted light on a focusing surface are symmetrical with respect to a main optical axis of a first lens, the frequency spectrum center of active region zeroth-order diffracted light is then loaded to the original frequency spectrum center without information change. In this way, the adverse effects of the dead region diffracted light and active region high-order diffracted light of the phase spatial light modulator on holographic wavefront printing are eliminated.Type: GrantFiled: October 26, 2022Date of Patent: February 11, 2025Assignee: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: Xiaolin Xie, Jinlun Zhou, Haiyan Peng, Yun Zhang, Huamin Zhou, Mingli Ni, Xingping Zhou
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Patent number: 11977353Abstract: An optical scanning holography system includes a polarization-sensitive lens configured to receive a linearly polarized beam and generate a first spherical wave of right-handed circular polarized light having a negative focal length and a second spherical wave of left-handed circular polarized light having a positive focal length, a first polarizer configured to pass only a beam component therethrough in a predetermined polarization direction among components of the generated first and second spherical waves, a scanning unit configured to scan an object by using an interference beam generated between the first and second spherical waves passing through the first polarizer, and a first photodetector configured to detect a beam reflected from the object.Type: GrantFiled: August 23, 2019Date of Patent: May 7, 2024Assignee: CUBIXEL CO., LTD.Inventor: Tae Geun Kim
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Patent number: 11809059Abstract: A system and method including, receiving a plurality of optical beams in a first direction along a first plane in a first beam pattern towards an optical element based on a trajectory that causes at least a portion of the plurality of optical beams to not contact a surface of the optical lens. The system and method includes transmitting a first set of the plurality of optical beams in the first direction along a second plane. The system and method includes transmitting a second set of the plurality of optical beams in the first direction along the first plane. The system and method includes generating a second beam pattern by transmitting the first set and the second set of the plurality of optical beams through an optical element, wherein the second beam pattern adjusts the trajectory to cause the portion to contact the surface of the optical lens.Type: GrantFiled: May 16, 2022Date of Patent: November 7, 2023Assignee: Aeva, Inc.Inventors: Bradley Scot Levin, Keith Gagne, Neal N. Oza, Cameron Howard
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Patent number: 11593956Abstract: A detection device includes: a first detector which irradiates light onto the target object and detects light emitted from the target object; a first shape information generator which generates first shape information representing a first shape of the target object on the basis of a detection result of the first detector; and a second shape information generator which adds a second shape, which is based on information different from the detection result of the first detector, to the first shape, and which generates second shape information representing a shape including the first shape and the second shape.Type: GrantFiled: June 1, 2020Date of Patent: February 28, 2023Assignee: NIKON CORPORATIONInventors: Yoshihiro Nakagawa, Taro Matsuo
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Patent number: 11543338Abstract: Holographic Video Microscopy analysis of non-spherical particles is disclosed herein. Properties of the particles are determined by application of light scattering theory to holography data. Effective sphere theory is applied to provide information regarding the reflective index of a sphere that includes a target particle. Known particles may be co-dispersed with unknown particles in a medium and the holographic video microscopy is used to determine properties, such as porosity, of the unknown particles.Type: GrantFiled: October 23, 2020Date of Patent: January 3, 2023Assignees: New York University, Spheryx, Inc.Inventors: David G. Grier, Mary Ann Odete, Fook Chiong Cheong, Annemarie Winters, Jesse J. Elliott, Laura A. Philips
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Patent number: 11482153Abstract: Systems and methods for a multi-primary color system for display. A multi-primary color system increases the number of primary colors available in a color system and color system equipment. Increasing the number of primary colors reduces metameric errors from viewer to viewer. One embodiment of the multi-primary color system includes Red, Green, Blue, Cyan, Yellow, and Magenta primaries. The systems of the present invention maintain compatibility with existing color systems and equipment and provide systems for backwards compatibility with older color systems.Type: GrantFiled: June 3, 2021Date of Patent: October 25, 2022Assignee: BAYLOR UNIVERSITYInventors: Gary B. Mandle, James M. DeFilippis, Mitchell J. Bogdanowicz, Corey P. Carbonara, Michael F. Korpi
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Patent number: 11428786Abstract: A three-dimensional imaging system includes an image intensification subsystem and an illumination subsystem that are both capable of operating with sinusoidal or pulsed waveforms in accordance with phase-measuring or flash modes of operation, respectfully, of the three-dimensional imaging system.Type: GrantFiled: December 3, 2018Date of Patent: August 30, 2022Assignee: MUNRO DESIGN & TECHNOLOGIES, LLCInventor: James F. Munro
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Patent number: 11409240Abstract: 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 one or more diffractive optical elements 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: GrantFiled: December 17, 2018Date of Patent: August 9, 2022Assignee: META PLATFORMS TECHNOLOGIES, LLCInventors: Ganghun Kim, Andrew Maimone, Alexander Jobe Fix, Robert Dale Cavin, Hee Yoon Lee, Matthieu Charles Raoul Leibovici, Brian Wheelwright, Douglas Robert Lanman
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Patent number: 11348614Abstract: The invention discloses a holographic multiplex recording method, which combines technical advantages of angle multiplexing and shift multiplexing, and improves capacity and stability of a system. A medium contracts and expands due to environmental temperature fluctuations, which causes broken Bragg condition. However, the angle multiplexing has the advantages that the broken Bragg condition caused by contraction and expansion of the medium can be corrected by controlling an incident angle of a reference beam and an emitting wavelength of a laser, and the problem of a weak reproduction signal caused by the environmental temperature fluctuations is solved. On the other hand, the advantages of shift multiplex recording are that cross-write noise is not accumulated and that a multiplexing number can be improved by using a cross-shift multiplex method. According to the present invention, a large-capacity recording device with high stability is realized by combining the two technologies.Type: GrantFiled: January 19, 2021Date of Patent: May 31, 2022Assignee: AMETHYSTUM STORAGE TECHNOLOGY CO., LTD.Inventors: Mu Zheng, Tiewei Luo, Jun Tian, Dejiao Hu, Yicheng Liu
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Patent number: 11335370Abstract: The invention relates to a positioning method and device for a hologram in a card-type holographic storage medium, which can be used for beam positioning of cross-shift multiplexing and belong to the technical field of optical holographic storage. A guide groove in a grid shape is engraved on a card-type storage medium, and is provided with positioning markers. Each marker includes position information and direction information, can control an optical head to move along the guide groove, and shift multiplexing/reproducing is performed when recognizing the positioning markers. Since the card-type medium is adopted, a 90-degree rotation can be executed three times, and a total of four times of shift multiplex recording is performed. Random access can be achieved even in a medium that is rotated and used by adopting the positioning method and device described in the present invention.Type: GrantFiled: January 19, 2021Date of Patent: May 17, 2022Assignee: Amethystum Storage Technology Co., Ltd.Inventors: Mu Zheng, Tiewei Luo, Jun Tian, Dejiao Hu, Yicheng Liu
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Patent number: 11322178Abstract: The present invention discloses a reflective holographic storage method and device, in which a reflection layer is plated on a back side of a holographic storage medium, and a new reference light is formed by utilizing the reflection layer, so that a phase conjugate reproduction light of a hologram is obtained. According to the invention, a recording device and a reading device can be provided on the same side of a medium, thereby obtaining a more compact system, reducing design difficulty, improving system stability, and improving the SNR (signal-noise ratio) of reproduction light by the interference between reproduction light and a conjugate reproduction light.Type: GrantFiled: January 19, 2021Date of Patent: May 3, 2022Assignee: AMETHYSTUM STORAGE TECHNOLOGY CO., LTD.Inventors: Mu Zheng, Tiewei Luo, Jun Tian, Dejiao Hu, Yicheng Liu
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Patent number: 11308988Abstract: A holographic multiplexed recording method for increasing storage capacity is disclosed. In a holographic recording and reproducing device, the moving direction of a storage medium is not coplanar with the plane where the optical axes of signal light and reference light are located, or the relative moving direction of the storage medium and the signal light or the reference light is not coplanar with the plane where the optical axes of the signal light and the reference light are located. Through the method, a certain angle exists between the grating vector direction and the moving direction or the relative moving direction, so that the phenomenon that the grating vector directions are the same does not occur when the medium is subjected to multiplexed recording after being rotated or flipped. Not only is multiplexing number increased, but also crosstalk caused by the same grating vector direction is prevented.Type: GrantFiled: December 28, 2020Date of Patent: April 19, 2022Assignee: AMETHYSTUM STORAGE TECHNOLOGY CO., LTD.Inventors: Mu Zheng, Tiewei Luo, Jun Tian, Dejiao Hu, Yicheng Liu
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Patent number: 11232814Abstract: The present patent relates to a parallel reproducing holographic disk reading method and device, and belongs to the technical field of optical holographic storage. According to an angle-shift multiplexing method included in the present patent, multiplex recording is performed by simultaneously changing an incident angle of a reference light and moving a medium with a fixed angle change amount and a fixed shift amount. In this method, the reference light can be split for incidence, and then holograms in different units can be simultaneously reproduced. According to the method disclosed by the patent, a recorded hologram can be read and written in real time, and a recorded signal can be checked under a condition of satisfying a response time required by the medium.Type: GrantFiled: January 19, 2021Date of Patent: January 25, 2022Assignee: AMETHYSTUM STORAGE TECHNOLOGY CO., LTD.Inventors: Mu Zheng, Tiewei Luo, Jun Tian, Dejiao Hu, Yicheng Liu
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Patent number: 11226589Abstract: A holographic image film, and a holographic image recording method and reconstruction method are provided. The holographic image recording method includes a preparation step, an irradiation step and a recording step. The preparation step includes stacking a holographic negative film on a transparent substrate. The irradiation step includes emitting object light and reference light. The reference light is emitted into the transparent substrate and undergoes multiple times of total reflections in a thickness of the transparent substrate to form total internal reflected light. The recording step includes generating a holographic image interference line by a mutual interference between the total internal reflected light and the object light, and recording the holographic image interference line on the holographic negative film in a photosensitive manner.Type: GrantFiled: September 6, 2019Date of Patent: January 18, 2022Assignee: inFilm Optoelectronic Inc.Inventors: Chih-Hsiung Lin, Chih-Chieh Chang
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Patent number: 11188026Abstract: An apparatus for manufacturing a hologram includes a holographic optical element on which a first interference pattern of a first signal beam and a first reference beam is recorded and a second interference pattern of a second signal beam modulated by a Fourier lens and a second reference beam is recorded. Also, an apparatus for reconstructing a hologram by using the holographic optical element is provided.Type: GrantFiled: January 9, 2020Date of Patent: November 30, 2021Assignee: SEOUL NATIONAL UNIVERSITY R&DB FOUNDATIONInventors: Byoungho Lee, Youngmo Jeong, Gang Li, Dukho Lee
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Patent number: 11054676Abstract: A system and method for improving spatial light modulator (SLM) devices such as Surface Acoustic Wave (SAW) modulators are disclosed. The SAW modulators can improved angular bandwidth and suppress unwanted diffractive orders. In one example, a coating layer(s) is applied to a proximal face of the SAW modulator to improve coupling of guided modes into leaky modes. Additionally, applying coating layers(s) such as a hybrid anti-reflective/highly reflective coating to an exit face of the SAW modulator can suppress transmission of undesired diffractive order(s).Type: GrantFiled: May 25, 2018Date of Patent: July 6, 2021Assignee: The Charles Stark Draper Laboratory, Inc.Inventors: Ian Ward Frank, Jeffrey A. Korn, Steven J. Byrnes, Dennis M. Callahan, Jr.
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Patent number: 10901221Abstract: The present invention comprises a compact optical see-through head-mounted display capable of combining, a see-through image path with a virtual image path such that the opaqueness of the see-through image path can be modulated and the virtual image occludes parts of the see-through image and vice versa.Type: GrantFiled: September 2, 2019Date of Patent: January 26, 2021Assignee: Magic Leap, Inc.Inventors: Chunyu Gao, Yuxiang Lin, Hong Hua
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Patent number: 10890718Abstract: A silicon photonic integrated system in a switch includes a multi-wavelength laser module, a first multiplexer, an optical channel, and a light signal generating element. The multi-wavelength laser module is configured to emit n laser beams with different peak wavelengths, and n is an integer greater than 2. The first multiplexer is optically coupled to the multi-wavelength laser module and configured to receive the laser beams and combine them into a combined beam. The optical channel is configured to receive a combined beam. The light signal generating element receives the combined beam through the optical channel and modulates the combined beam to emit a plurality of light output signals.Type: GrantFiled: September 9, 2019Date of Patent: January 12, 2021Assignee: Centera Photonics Inc.Inventors: Chien-Chen Hsieh, Shang-Jen Yu, Hsiao-Chin Lan
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Patent number: 10877604Abstract: In one form, an optical touch screen system includes a semiconductor body forming a hybrid display and image sensor comprising a plurality of display pixels interspersed with a plurality of image sensor pixels, a spatial light modulator overlying a surface of the hybrid display and image sensor, and a control circuit for driving the plurality of display pixels with a first pattern and measuring a second pattern of the plurality of image sensor pixels, the control circuit analyzing the second pattern to detect a position of an object and selectively detecting a touch location in response to the second pattern.Type: GrantFiled: April 16, 2019Date of Patent: December 29, 2020Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLCInventors: Terry Gilton, Victor Lenchenkov, Brian W. Keelan
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Patent number: 10824114Abstract: A quantum simulator includes a pseudo speckle pattern generator, a main vacuum chamber, an atomic gas supply unit, a light beam generator, a photodetector, and an atom number detector. The pseudo speckle pattern generator generates a pseudo speckle pattern in the inside of the main vacuum chamber by light allowed to enter the inside of the main vacuum chamber through the second window. The pseudo speckle pattern generator includes a controller, a light source, a beam expander, a spatial light modulator, and a lens. The controller sets a modulation distribution of the spatial light modultor based on a two-dimensional pseudo random number pattern.Type: GrantFiled: April 4, 2018Date of Patent: November 3, 2020Assignees: HAMAMATSU PHOTONICS K.K., INTER-UNIVERSITY RESEARCH INSTITUTE CORPORATION NATIONAL SCIENCESInventors: Hiroto Sakai, Kenji Ohmori, Taro Ando, Nobuyuki Takei, Haruyoshi Toyoda, Yoshiyuki Ohtake, Tomoko Hyodo, Yuu Takiguchi
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Patent number: 10732569Abstract: Holographic volume gratings in waveguide cells can be recorded using many different methods and systems in accordance with various embodiments of the invention. One embodiment includes a holographic recording system including at least one laser source configured to emit recording beams and a movable platform configured to move between a first position and a second position, wherein when the movable platform is in the first position, the at least one laser source is configured to emit a first set of one or more recording beams toward a first set of one or more stations and when the movable platform is in the second position, the at least one laser source is configured to emit a second set of one or more recording beams toward a second set of one or more stations.Type: GrantFiled: August 29, 2018Date of Patent: August 4, 2020Assignee: DigiLens Inc.Inventors: Jonathan David Waldern, Alastair John Grant, Milan Momcilo Popovich, Ratson Morad, Sean Michael Williams
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Patent number: 10700804Abstract: We describe a wavelength division multiplexed (WDM) reconfigurable optical switch, the switch comprising: a set of arrays of optical beam connections, each comprising an array of optical outputs and having an optical input to receive a WDM input optical signal; a first diffractive element to demultiplexed said WDM input optical signal into a plurality of demultiplexed optical input beams, and to disperse said demultiplexed optical input beams spatially along a first axis; first relay optics between said set of arrays of optical beam connections and said first diffractive element; and a reconfigurable holographic array comprising a 2D array of reconfigurable sub-holograms defining sub-hologram rows and columns; wherein said arrays of said set of arrays are at least one dimensional arrays extending spatially in a direction parallel to said first axis and arranged in a column defining a second axis orthogonal to said first axis; wherein said sub-hologram rows are aligned along said first axis, and wherein said sType: GrantFiled: August 20, 2019Date of Patent: June 30, 2020Assignee: Roadmap Systems LTDInventors: Brian Robertson, Daping Chu, Haining Yang, Peter John Wilkinson
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Patent number: 10495627Abstract: An apparatus for measuring through optical means temporally resolved, optical properties, and/or phenotypes, linked to cellular homeostasis. Those temporal measurements enable the detection of cell regulation through various channels linked to homeostasis, in order to assess cell viability or early cell death through rapid diagnostic.Type: GrantFiled: May 5, 2016Date of Patent: December 3, 2019Assignee: LYNCEE TEC S.A.Inventors: Nicolas Pavillon, Jonas Kühn, Pascal Jourdain, Christian Depeursinge, Pierre Julius Magistretti, Pierre Marquet
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Patent number: 10491322Abstract: A wavelength division multiplexed (WDM) reconfigurable optical switch. The switch has a set of arrays of optical beam connections, each comprising an array of optical outputs and having an optical input to receive a WDM input optical signal; a first diffractive element to demultiplexed the WDM input optical signal into a plurality of demultiplexed optical input beams, and to disperse said demultiplexed optical input beams spatially along a first axis; first relay optics between the set of arrays of optical beam connections and the first diffractive element; and a reconfigurable holographic array comprising a 2D array of reconfigurable sub-holograms defining sub-hologram rows and columns. The arrays of said set of arrays and the sub-hologram rows and columns are arranged and aligned in particular ways so that wavelength channels of the WDM input signal for each array can be steered within the device towards a selected optical output.Type: GrantFiled: September 19, 2016Date of Patent: November 26, 2019Assignee: Roadmap Systems LtdInventors: Brian Robertson, Daping Chu, Haining Yang, Peter John Wilkinson
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Patent number: 10473681Abstract: According to one embodiment, a beam splitter splits light into first light and second light. The second light is used to irradiate a sample containing particles. A first imaging device images a first interference pattern formed by multiplexing third light, which has been generated by irradiating the particles with the second light, and the first light. A second imaging device images a second interference pattern formed by the third light. An arithmetic device compares a composite image with a calculated image. The composite image is created by using a first interference image picked up by the first imaging device and a second interference image picked up by the second imaging device. The calculated image is obtained by combining single particle interference images, each of which is expected to be obtained by the first imaging device in a case where a particle is present alone in the sample.Type: GrantFiled: August 14, 2018Date of Patent: November 12, 2019Assignee: Toshiba Memory CorporationInventor: Chikara Tanioka
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Patent number: 10466038Abstract: A motion compensation system for a shearography apparatus includes: an adjustable first fold mirror to reflect laser radiation to a receiving aperture of the shearography apparatus during separate pulse periods at corresponding angles of reflection; and corresponding second fold mirrors to reflect the laser radiation from a target surface to the first fold mirror during the respective pulse periods. The shearography apparatus moves with respect to the target surface between the separate pulse periods. The angles of reflection make the laser radiation reflected from the target surface via the respective second fold mirrors appear to the receiving aperture as if the shearography apparatus is stationary with respect to the target surface. In another system, the second fold mirrors are replaced by an adjustable second fold mirror to reflect the laser radiation from the target surface to the first fold mirror during the pulse periods at corresponding second angles of reflection.Type: GrantFiled: September 7, 2018Date of Patent: November 5, 2019Assignee: BAE Systems Information and Electronic Systems Integration Inc.Inventors: Daniel N. Kokubun, Sidney Pang
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Patent number: 10451883Abstract: The present invention comprises a compact optical see-through head-mounted display capable of combining, a see-through image path with a virtual image path such that the opaqueness of the see-through image path can be modulated and the virtual image occludes parts of the see-through image and vice versa.Type: GrantFiled: November 20, 2018Date of Patent: October 22, 2019Assignee: Magic Leap, Inc.Inventors: Chunyu Gao, Yuxiang Lin, Hong Hua
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Patent number: 10416609Abstract: Light reflected from an illuminated object is mixed with a reference beam and sensed at a sensor array of a digital hologram apparatus. Digital hologram data, determined from the sensed light, is dependent upon complex valued reflection coefficients of the object and upon phase perturbations in propagation paths between the object and the sensor array. Reflectance values, which may be dependent upon expected values of the absolute square of the reflection coefficients, and phase perturbations are determined for which a test function is at an extremum, where the test function contains a data fidelity term dependent upon the hologram data from a single hologram, a first regularization term dependent upon the phase perturbations and a second regularization term dependent upon the reflectance values. An image of the object may be formed from the reflectance values and a wavefront of the reflected light may be determined from the phase perturbations.Type: GrantFiled: March 7, 2018Date of Patent: September 17, 2019Assignee: The Government of the United States of America as Represented by the Secretary of the Air ForceInventors: Casey J. Pellizzari, Mark F. Spencer, Charles A. Bouman, Jr.
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Patent number: 10401792Abstract: The techniques, apparatus, material and systems are described for a portable camera device which can be attached to the camera port of a conventional transmission or reflection microscope for complex wave front analysis. At least one holographic element (BS, grating) splits the beam (s) containing the sample information in two beams (r,o) and filters (r?, o?) them. The proposed invention has a relaxed alignment sensitivity to displacement of the beam coming from the microscope. Besides since it compensates the coherence plane tilt angle between reference and object arms, it allows for creating high-visibility interference over the entire field of view. The full-field off-axis holograms provide the whole sample information.Type: GrantFiled: February 5, 2015Date of Patent: September 3, 2019Assignee: Lyncée Tec SAInventors: Christophe Moser, Zahra Monemhaghdoust, Frédéric Montfort, Christian Depeursinge, Yves Emery
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Patent number: 10185287Abstract: An illumination apparatus includes a light source unit emitting coherent light in a first direction, a first light division unit, including a plurality of first slots, receiving the coherent light, each slot of the plurality of first slots reflecting a part of the coherent light in a second direction crossing the first direction, and a surface lighting plate including a plurality of second light division units, each light division unit of the plurality of second light division units includes a light guide through which light progresses, and each light division unit of the plurality of second light division units includes a plurality of second slots. Each slot of the plurality of second slots of each second light division unit reflects a part of the coherent light received from a corresponding slot of the plurality of first slots in a third direction which crosses the first and second directions.Type: GrantFiled: March 7, 2017Date of Patent: January 22, 2019Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Hye Sog Lee, Jae Joong Kwon
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Patent number: 10181336Abstract: An optical data-recording system comprises a laser, a dynamic digital hologram, an electronic controller, and a scanning mechanism. The dynamic digital hologram includes a plurality of holographic zones, and is configured to direct the irradiance received thereon to an optical recording medium. The electronic controller is operatively coupled to the dynamic digital hologram and configured to control the irradiance directed from each of the holographic zones. The scanning mechanism is configured to change a relative positioning of the laser versus the dynamic digital hologram so that each of the holographic zones is irradiated in sequence by the laser.Type: GrantFiled: September 8, 2017Date of Patent: January 15, 2019Assignee: MICROSOFT TECHNOLOGY LICENSING, LLCInventors: Andreas Georgiou, Joel Steven Kollin, Ariel Gomez Diaz
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Patent number: 10175491Abstract: The present invention comprises a compact optical see-through head-mounted display capable of combining, a see-through image path with a virtual image path such that the opaqueness of the see-through image path can be modulated and the virtual image occludes parts of the see-through image and vice versa.Type: GrantFiled: May 11, 2018Date of Patent: January 8, 2019Assignee: Magic Leap, Inc.Inventors: Chunyu Gao, Yuxiang Lin, Hong Hua
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Patent number: 10133007Abstract: A laser interference lithography device using all-fiber-optic components is disclosed. In the said all-fiber laser interference lithography device, an input coupling fiber receives the coherent laser beam from a laser source and sends it to an optical fiber splitter. The optical fiber splitter splits the input laser beam into at least two sub-beams and outputs the multiple sub-beams through multiple output optical fiber. Adjustable fiber holders, each carrying one output fiber, tune the position and angle of output optical fibers to achieve desired interference patterns on a substrate.Type: GrantFiled: May 22, 2015Date of Patent: November 20, 2018Inventor: Wendi Li
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Patent number: 10126561Abstract: A decorative plastic molded article has an outer appearance of metallic color like and a display of a character, a graph or a symbol. A body of the molded article has a plate-like portion; the plate-like portion has a first surface and a second surface; a small concave and convex portion is formed on the second surface; the small concave and convex portion has a plurality of inclined surfaces. The outer appearance of metallic color like is obtained by the total reflection light at the inclined surface and the display of a character, a graph or a symbol is obtained by the transmissive light through a planar transparent portion with shape of a character, a graph or a symbol formed in the small concave and convex portion or the total reflection light at the small concave and convex portion with shape of a character, a graph or a symbol.Type: GrantFiled: December 21, 2015Date of Patent: November 13, 2018Assignee: SEIKOH GIKEN CO., LTD.Inventors: Norihiro Kakinuma, Masahide Hioki
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Patent number: 10105035Abstract: A light-intensity-based forced sensor comprises a Sarrus linkage, a biasing mechanism, a light emitter, and a light detector includes a first plate, a second plate, and at least one collapsible linkage pivotably coupled to both the first and the second plates. The biasing mechanism biases the collapsible linkage toward an extended configuration. The light emitter is coupled with and displaceable with the first plate; and the light detector is coupled with and displaceable with the second plate and configured to receive light emitted from the light emitter and generate an electrical signal in response to light received from the light emitter, wherein the generated electrical signal provides an indication of the distance between the first plate and the second plate. The sensor can be distally mounted on, e.g., an endoscope to provide haptic feedback at the distal end of the endoscope.Type: GrantFiled: June 15, 2016Date of Patent: October 23, 2018Assignee: President and Fellows of Harvard CollegeInventors: Joshua Gafford, Conor J. Walsh, Robert J. Wood
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Patent number: 10031424Abstract: The objective of the present invention is providing a method for fabricating high quality diffractive waveplates and their arrays that exhibit high diffraction efficiency over large area, the method being capable of inexpensive large volume production. The method uses a polarization converter for converting the polarization of generally non-monochromatic and partially coherent input light beam into a pattern of periodic spatial modulation at the output of said polarization converter. A substrate carrying a photoalignment layer is exposed to said polarization modulation pattern and is coated subsequently with a liquid crystalline material. The high quality diffractive waveplates of the present invention are obtained when the exposure time of said photoalignment layer exceeds by generally an order of magnitude the time period that would be sufficient for producing homogeneous orientation of liquid crystalline materials brought in contact with said photoalignment layer.Type: GrantFiled: July 28, 2015Date of Patent: July 24, 2018Assignees: Beam Engineering for Advanced Measurements Co., The United States of America as Represented by the Secretary of the ArmyInventors: Nelson V. Tabirian, Sarik R. Nersisyan, Brian R. Kimball, Diane M. Steeves
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Patent number: 10031334Abstract: A phase-adjusting element configured to provide substantially liquid-invariant extended depth of field for an associated optical lens. One example of a lens incorporating the phase-adjusting element includes the lens having surface with a modulated relief defining a plurality of regions including a first region and a second region, the first region having a depth relative to the second region, and a plurality of nanostructures formed in the first region. The depth of the first region and a spacing between adjacent nanostructures of the plurality of nanostructures is selected to provide a selected average index of refraction of the first region, and the spacing between adjacent nanostructures of the plurality of nanostructures is sufficiently small that the first region does not substantially diffract visible light.Type: GrantFiled: February 9, 2011Date of Patent: July 24, 2018Assignee: Brien Holden Vision InstituteInventors: Zeev Zalevsky, Ofer Limon
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Patent number: 9952556Abstract: A method for single-write holographic imaging involves determining a layout of a plurality of holographic images on a substrate, the plurality of holographic images including at least a first holographic image having a first parameter set and a second holographic image having a second parameter set, inputting the parameter sets into a database and controlling an imaging apparatus to image the first and second holographic images on the substrate in a single session to create an integrated holographic pattern.Type: GrantFiled: May 24, 2013Date of Patent: April 24, 2018Assignee: HAZEN PAPER COMPANYInventors: John Hazen, Larry Hoague
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Patent number: 9916853Abstract: A holographic storage layer includes a reflective structure and photosensitive units. The reflective structure is a grid-shaped structure and includes cavities. The photosensitive units are disposed in the cavities, in which each of the photosensitive units is surrounded by the reflective structure. First openings and second openings are defined by the reflective structure, and the photosensitive units are exposed by the first openings and the second openings respectively.Type: GrantFiled: December 26, 2016Date of Patent: March 13, 2018Assignee: National Central UniversityInventors: Yeh-Wei Yu, Ching-Cherng Sun
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Patent number: 9874752Abstract: The present invention comprises a compact optical see-through head-mounted display capable of combining, a see-through image path with a virtual image path such that the opaqueness of the see-through image path can be modulated and the virtual image occludes parts of the see-through image and vice versa.Type: GrantFiled: May 26, 2017Date of Patent: January 23, 2018Assignee: Magic Leap, Inc.Inventors: Chunyu Gao, Yuxiang Lin, Hong Hua
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Patent number: 9774930Abstract: We describe methods and devices for manipulating optical signals. A method of manipulating an optical signal comprises providing a device (100) comprising a layer (106) of blue phase liquid crystal in the path of the optical signal; and applying a dynamically varying spatial pattern of voltages across the layer (106) of blue phase liquid crystal, thereby causing the refractive index of the layer (106) of blue phase liquid crystal to vary according the dynamically varying spatial pattern.Type: GrantFiled: January 23, 2013Date of Patent: September 26, 2017Assignee: Cambridge Enterprise LimitedInventors: Daping Chu, Neil Collings, John Richard Moore, Mykhaylo Pivnenko, Brian Robertson
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Patent number: 9753432Abstract: An optical head for a hologram optical apparatus and a method of operating the same are provided. The optical head for the hologram optical apparatus includes a reference light unit for guiding reference light, a signal light unit for guiding signal light, and a light source unit for providing 1 the reference light and the signal light to the reference light unit and the signal light unit, wherein the reference light unit and the signal light unit are stacked. The signal light unit includes: a plurality of optical waveguides stacked sequentially; composite hologram optical elements and lighting hologram optical elements disposed on the plurality of optical waveguides; an optical modulator for modulating light output from the plurality of the optical waveguides; and a lens for condensing light output from the optical modulator onto a recording layer.Type: GrantFiled: November 14, 2013Date of Patent: September 5, 2017Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Kyoung-seok Pyun, Chil-sung Choi, Alexander Morozov, Jung-kwuen An, Sun-il Kim, Ivan Bovsunovskiy, Andrew Putilin
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Patent number: 9696476Abstract: Complex spectral and angular diffractive optical elements in photosensitive materials based on Moiré pattern are proposed and demonstrated. The process is based on the recording of multiple volume Bragg gratings with controlled difference of the periods in the same volume of photosensitive material. Filters with ultra-narrow bandpass in the range of a few picometers to a few tens of picometers or apodized diffractive optical elements across large aperture are demonstrated. Several methods to fabricating such Moiré Bragg gratings are proposed. Experimental demonstration of a Moiré ultra-narrowband diffractive optical element in PTR glass is performed.Type: GrantFiled: May 14, 2010Date of Patent: July 4, 2017Assignees: Optigrate Corporation, University of Central Florida Research Foundation, Inc.Inventors: Leonid B. Glebov, Julien Lumeau, Sergiy Mokhov, Vadim Smirnov, Boris Zeldovich
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Patent number: 9696478Abstract: An optical device is provided for coupling an external optical signal into a plurality of on-chip photonic sub-circuits provided on a substrate. The optical device comprises: a planar waveguide layer on the substrate; a diverging grating coupler configured to couple the external optical signal to the planar waveguide layer and to thereby create an on-chip diverging optical beam in the planar waveguide layer; and a plurality of channel waveguides formed in the waveguide layer. Each channel waveguide of the plurality of channel waveguides comprises a waveguide transition structure having a waveguide aperture oriented towards the diverging grating coupler. For each channel waveguide of the plurality of channel waveguides the position and the width of the corresponding waveguide aperture and the angle and the shape of the waveguide transition structure are individually selected to capture a predetermined portion of the on-chip diverging optical beam.Type: GrantFiled: July 24, 2015Date of Patent: July 4, 2017Assignees: IMEC VZW, Universiteit GentInventor: Wim Bogaerts
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Patent number: 9599960Abstract: The imaging apparatus includes an optical system dividing light into object and reference beams and causing the object beam and the reference beam to interfere with each other to form interference fringes on an image sensor. A processor performs multiple imaging processes for the interference fringes with different incident angles of the object beam to an object, a first process to acquire a transmitted wavefront for each incident angle and a second process to calculate a three-dimensional refractive index distribution from the transmitted wavefronts. The apparatus includes a modulator changing a phase distribution of light in any one of an optical path from a light source to a dividing element, a reference beam path and an optical path from a combining element to the image sensor and causes the modulator to change the phase distribution in at least one of the multiple imaging processes.Type: GrantFiled: December 11, 2014Date of Patent: March 21, 2017Assignee: CANON KABUSHIKI KAISHAInventor: Akira Eguchi
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Patent number: 9575464Abstract: An apparatus including a laser generating a plane wave beam, a first beam splitter splitting the plane wave beam into a first reference laser beam and at least one ideal input beam, at least one second beam splitter, and an angle-magnifying optical element. The at least one second beam splitter reflects the at least one ideal input beam through the angle-magnifying optical element to generate at least one distorted input beam. The apparatus further includes a focal plane array receiving the first reference laser beam and the at least one distorted input beam and recording at least one interference pattern generated by the first reference laser beam and the at least one distorted input beam. The apparatus further includes a spatial light modulator generating the at least one recorded interference pattern, receiving the reference laser beam, and transmitting at least one time-reversed output beam through the angle-magnifying optical element.Type: GrantFiled: March 12, 2014Date of Patent: February 21, 2017Inventor: Vincent A. Cassella
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Patent number: 9557711Abstract: Proposed is a method of static scaling of an image in holographic lithography. The method consists of generating a final virtual digital hologram of the original pattern through a sequence of mathematical calculations with participation of a virtual coherent light source having a predetermined wavelength ?1 and producing an actual hologram on the basis of the virtual digital hologram of the original pattern. The obtained hologram can be used for forming an actual original pattern in a predetermined size. When it is necessary to produce the original pattern in another size, this can be done by static scaling by merely selecting another wavelength for the laser source with adjustable wavelength. The method allows determining the wavelength range in which scalability is possible with substantially homothetic transformation of the image.Type: GrantFiled: May 1, 2014Date of Patent: January 31, 2017Inventor: Vadim Rakhovsky
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Patent number: 9492969Abstract: A high-resolution P?SL system and method incorporating one or more of the following features with a standard P?SL system using a SLM projected digital image to form components in a stereolithographic bath: a far-field superlens for producing sub-diffraction-limited features, multiple spatial light modulators (SLM) to generate spatially-controlled three-dimensional interference holograms with nanoscale features, and the integration of microfluidic components into the resin bath of a P?SL system to fabricate microstructures of different materials.Type: GrantFiled: May 31, 2011Date of Patent: November 15, 2016Assignee: Lawrence Livermore National Security, LLCInventors: Christopher M. Spadaccini, George Farquar, Todd Weisgraber, Steven Gemberling, Nicholas Fang, Jun Xu, Matthew Alonso, Howon Lee