Optical Modulator Patents (Class 359/237)
  • Patent number: 10761396
    Abstract: Optical modulators are described having a Mach-Zehnder interferometer and a pair of RF electrodes interfaced with the Mach-Zehnder interferometer in which the Mach-Zehnder interferometer comprises optical waveguides formed from semiconductor material. The optical modulator also comprises a ground plane spaced away in a distinct plane from transmission line electrodes formed from the association of the pair of RF electrodes interfaced with the Mach-Zehnder interferometer. The ground plane can be associated with a submount in which an optical chip comprising the Mach-Zehnder interferometer and the pair of RF electrodes is mounted on the submount with the two semiconductor optical waveguides are oriented toward the submount. Methods for forming the modulators are described.
    Type: Grant
    Filed: March 17, 2017
    Date of Patent: September 1, 2020
    Assignee: NeoPhotonics Corporation
    Inventors: Chengkun Chen, Maxime Poirier, Raghuram Narayan, Milind Gokhale, Marcel G. Boudreau
  • Patent number: 10747031
    Abstract: An optical phase modulation device for modulating a phase of an input light signal at a modulation frequency is provided, which can be used in integrated photonics applications. The device can include an optical phase modulator, for example a thermo-optic phase shifter having an effective refractive index that depends linearly temperature, configured to impart a phase shift to the input light signal, the phase shift varying quadratically in response to an applied modulating electric drive signal. The device can also include a phase modulator driver configured to apply the electric drive signal to the optical phase modulator, the electric drive signal having a time-varying component oscillating at half the modulation frequency and no time-constant component, thereby imparting the phase shift, modulated at the modulation frequency, to the phase of the input light signal to produce a phase-modulated light signal. Optical phase modulation systems and methods are also disclosed.
    Type: Grant
    Filed: July 24, 2019
    Date of Patent: August 18, 2020
    Assignee: TeraXion Inc.
    Inventor: André Babin
  • Patent number: 10731964
    Abstract: A multi-beam optical phased array on a single planar waveguide layer or a small number of planar waveguide layers enables building an optical sensor that performs much like a significantly larger telescope. Imaging systems use planar waveguides created using micro-lithographic techniques. These imagers are variants of “phased arrays,” common and familiar from microwave radar applications. However, there are significant differences when these same concepts are applied to visible and infrared light.
    Type: Grant
    Filed: November 3, 2017
    Date of Patent: August 4, 2020
    Assignee: The Charles Stark Draper Laboratory, Inc.
    Inventors: Benjamin F. Lane, Steven J. Spector, Alan X. Zhou, Julian A. Brown, Michael G. Moebius
  • Patent number: 10735097
    Abstract: A full duplex communication network includes an optical transmitter end having a first coherent optics transceiver, an optical receiver end having a second coherent optics transceiver, and an optical transport medium operably coupling the first coherent optics transceiver to the second coherent optics transceiver. The first coherent optics transceiver is configured to (i) transmit a downstream optical signal at a first wavelength, and (ii) simultaneously receive an upstream optical signal at a second wavelength. The second coherent optics transceiver is configured to (i) receive the downstream optical signal, and (ii) simultaneously transmit the upstream optical signal. The first wavelength has a first center frequency separated from a second center frequency of the second wavelength.
    Type: Grant
    Filed: February 12, 2019
    Date of Patent: August 4, 2020
    Assignee: Cable Television Laboratories, Inc
    Inventors: Zhensheng Jia, Luis Alberto Campos, Jing Wang, Mu Xu, Haipeng Zhang, Curtis Dean Knittle
  • Patent number: 10707645
    Abstract: In one example, a method includes outputting, by a power supply and across a supply node and a ground node, a supply power signal; and selectively outputting, by a driver, a power signal to a second terminal of a light emitting element that has a first terminal and the second terminal, wherein the first terminal of the light emitting element is coupled to a load node, wherein a supply terminal of the driver is coupled to the supply node, wherein a ground terminal driver is coupled to the ground node, and wherein a difference between a potential of the supply node and a potential of the ground node is less than an activation voltage of the light emitting element.
    Type: Grant
    Filed: January 22, 2018
    Date of Patent: July 7, 2020
    Assignee: Infineon Technologies AG
    Inventors: Herwig Wappis, Fabrizio Cortigiani
  • Patent number: 10690911
    Abstract: A head-up display device includes: an image formation unit which emits light including image information; and a projection optical system including an ocular optical system which displays a virtual image by reflecting the light emitted from the image formation unit. The ocular optical system includes spherical lenses, a free-form curved surface lens, a reflection mirror, and a free-form curved surface mirror, and is configured by arranging, in a space on the side of the ocular optical system of a plane conjugate with the virtual image plane with respect to the ocular optical system, a first small lens system which achieves first focus position movement and on which separated light from the image formation unit is made to be incident, and a second small lens system which achieves second focus position movement and on which separated light from the image formation unit is made to be incident.
    Type: Grant
    Filed: October 9, 2015
    Date of Patent: June 23, 2020
    Assignees: MAXELL, LTD., HITACHI INDUSTRY & CONTROL SOLUTIONS, LTD.
    Inventors: Masahiko Yatsu, Koji Hirata, Kazuomi Kaneko
  • Patent number: 10684311
    Abstract: The disclosure includes an electro-optical sensor. The electro-optical sensor includes a test signal input to receive a test signal from a device under test (DUT). A bias circuit is employed to generate a bias signal. The electro-optical sensor also includes a Mach-Zehnder Modulator (MZM) that employs an optical input, an optical output, and a bias input. The MZM is configured to receive an optical carrier signal via the optical input. The MZM also receives both the test signal and the bias signal on the bias input. The MZM modulates the test signal from the bias input onto the optical carrier to generate an optical signal while operating in a mode selected by the bias signal. The MZM also outputs the optical signal over the optical output.
    Type: Grant
    Filed: April 9, 2018
    Date of Patent: June 16, 2020
    Assignee: Tektronix, Inc.
    Inventors: Michael J. Mende, Richard A. Booman
  • Patent number: 10684470
    Abstract: A lens system includes a first lens array assembly including a first plurality of cells, each cell of the first plurality of cells configured to exhibit a pair of first Fourier transform lenses, and a second lens array assembly including a second plurality of cells, each cell of the second plurality of cells configured to exhibit a pair of second Fourier transform lenses. The first and second lens array assemblies are positioned relative to one another along an optical axis of the lens system such that light diverging from an object at a plane disposed at an object conjugate distance from the first lens array assembly reconverges at an image plane after passing through the first and second lens array assemblies. The image plane is disposed at an image conjugate distance from the second lens array assembly in accordance with the object conjugate distance.
    Type: Grant
    Filed: November 17, 2016
    Date of Patent: June 16, 2020
    Assignee: Microsoft Technology Licensing, LLC
    Inventor: Karlton D. Powell
  • Patent number: 10634970
    Abstract: An electrochromic element including: a first electrode; a second electrode that is opposed to and apart from the first electrode; and an electrolyte that is between the first electrode and the second electrode, wherein the first electrode includes a polymerized product of an electrochromic composition that includes a radical-polymerizable compound including a triarylamine backbone, and wherein the second electrode includes a compound represented by General Formula (I) where R1 and R2 each denote a hydrogen atom, an aryl group including 14 or less carbon atoms, a heteroaryl group including 14 or less carbon atoms, a branched alkyl group including 10 or less carbon atoms, an alkenyl group including 10 or less carbon atoms, a cycloalkyl group including 10 or less carbon atoms, or a functional group that is capable of binding to a hydroxyl group; n and m each denote 0 or an integer of from 1 through 10; and X? denotes a charge-neutralizing ion.
    Type: Grant
    Filed: October 19, 2016
    Date of Patent: April 28, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Daisuke Goto, Toshiya Sagisaka, Satoshi Yamamoto, Masato Shinoda, Mamiko Inoue, Tohru Yashiro
  • Patent number: 10637207
    Abstract: A driver circuit 11 includes a plurality of cascode-connected NMOS transistors, a modulating signal VGN1 is applied to a gate terminal of a lowermost stage transistor TN1 located at a lowermost stage out of the NMOS transistors, and an upper stage bias potential VGN2 that is a sum of a minimum gate-source voltage VGN1min and a maximum drain-source voltage VDS1max of a transistor (TN1) located immediately below an upper stage transistor located at an upper stage above the lowermost stage transistor of the NMOS transistors is applied to the upper stage transistor TN2.
    Type: Grant
    Filed: October 16, 2017
    Date of Patent: April 28, 2020
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Toshiki Kishi, Munehiko Nagatani, Shinsuke Nakano, Hiroaki Katsurai, Masafumi Nogawa, Hideyuki Nosaka
  • Patent number: 10613253
    Abstract: A metasurface is capable of modulating input light including a wavelength in a range of 880 nm to 40 ?m. The metasurface includes: a GaAs substrate including a light input surface into which input light is input and a light output surface facing the light input surface; an interlayer having a lower refractive index than GaAs and disposed on the light output surface side of the GaAs substrate; and a plurality of V-shaped antenna elements disposed on a side of the interlayer which is opposite to the GaAs substrate side and including a first arm and a second arm continuous with one end of the first arm.
    Type: Grant
    Filed: September 12, 2017
    Date of Patent: April 7, 2020
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Yoshiro Nomoto, Yoshitaka Kurosaka, Kazuyoshi Hirose, Takahiro Sugiyama, Soh Uenoyama
  • Patent number: 10606091
    Abstract: To provide a naked-eye type stereoscopic display device which can achieve a fine stereoscopic display property while achieving high-definition display and high yield. Aperture parts of sub-pixels neighboring to a first direction include overlapping regions which overlap in a second direction and a non-overlapping region which does not overlap. Provided that a width of the aperture part in the second direction is defined as a longitudinal aperture width, the non-overlapping region includes an aperture width fluctuating region where the longitudinal aperture width changes continuously from roughly a center of the aperture part towards both ends of the first direction, respectively. The sum of the longitudinal aperture widths of the two overlapping regions overlapping with each other at a same position in the first direction is larger than the longitudinal aperture width in roughly the center of the aperture part.
    Type: Grant
    Filed: December 21, 2015
    Date of Patent: March 31, 2020
    Assignee: TIANMA MICROELECTRONICS CO., LTD.
    Inventors: Takuya Asai, Koji Shigemura
  • Patent number: 10591824
    Abstract: According to one embodiment, an illumination optical apparatus comprises: a light splitting device which splits the beam into a plurality of beams with respective polarization states different from each other; a spatial light modulation device which is arranged on at least one of a first optical path in which a first beam out of the plurality of beams travels and a second optical path in which a second beam out of the plurality of beams travels, and which has a plurality of optical elements arranged two-dimensionally and driven individually; and a control device which controls the spatial modulation device to combine the first beam and the second beam at least in part.
    Type: Grant
    Filed: March 28, 2016
    Date of Patent: March 17, 2020
    Assignee: NIKON CORPORATION
    Inventor: Toru Fujii
  • Patent number: 10587345
    Abstract: An apparatus measures the transverse profile of vectorial optical field beams, including at least the directional intensity complex amplitude, the phase and the polarization spatial profile. The apparatus contains a polarization separation module, a weak perturbation module, and a detection module. Characterizing the transverse profile of vector fields provides an optical metrology tool for both fundamental studies of vectorial optical fields and a wide spectrum of applications, including microscopy, surveillance, imaging, communication, material processing, and laser trapping.
    Type: Grant
    Filed: April 26, 2019
    Date of Patent: March 10, 2020
    Assignee: University of South Florida
    Inventor: Zhimin Shi
  • Patent number: 10571108
    Abstract: An apparatus and a method for cooling a digital micromirror device are disclosed. For example, the apparatus includes a digital micromirror device (DMD), a housing coupled to the DMD, wherein a first side of the housing is coupled to a bottom of the DMD and a cooling block coupled to a second side of the housing that is opposite the first side. The cooling block includes a plate that includes a plurality of openings, a diaphragm coupled to the plate, an air inlet to generate an airflow across the plate, wherein the diaphragm creates a force to move the airflow in a direction that is perpendicular to a direction of the airflow towards the second side of the housing, and an air outlet to collect the airflow.
    Type: Grant
    Filed: February 6, 2018
    Date of Patent: February 25, 2020
    Assignee: Xerox Corporation
    Inventor: Francisco Zirilli
  • Patent number: 10571794
    Abstract: A video is superimposed on an object in order that the object will be perceived as if the object were given a motion. This video is a video including a luminance motion component corresponding to a motion given to the object.
    Type: Grant
    Filed: April 21, 2015
    Date of Patent: February 25, 2020
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Takahiro Kawabe, Shinya Nishida, Kazushi Maruya, Masataka Sawayama
  • Patent number: 10571630
    Abstract: An optical system includes a silicon (Si) substrate, a buried oxide (BOX) layer formed on the substrate, a silicon nitride (SiN) layer formed above the BOX layer, and a SiN waveguide formed in the SiN layer. In some embodiments, the optical system may additionally include an interposer waveguide adiabatically coupled to the SiN waveguide to form a SiN-interposer adiabatic coupler that includes at least the tapered section of the SiN waveguide, the optical system further including at least one of: a cavity formed in the Si substrate at least beneath the SiN-interposer adiabatic coupler or an oxide overlay formed between a top of a SiN core of the SiN waveguide and a bottom of the interposer waveguide. Alternatively or additionally, the optical system may additionally include a multimode Si—SiN adiabatic coupler that includes a SiN taper of a SiN waveguide and a Si taper of a Si waveguide.
    Type: Grant
    Filed: November 19, 2018
    Date of Patent: February 25, 2020
    Assignee: Finisar Corporation
    Inventors: Daniel Mahgerefteh, Bryan Park
  • Patent number: 10564509
    Abstract: A Mach-Zehnder modulator includes: a first semiconductor arm including a lower semiconductor region, an upper semiconductor layer, and a core layer disposed between the lower semiconductor region and the upper semiconductor layer; a second semiconductor arm including a lower semiconductor region, an upper semiconductor layer, and a core layer disposed between the lower semiconductor region and the upper semiconductor layer; a conductive semiconductor region connecting the lower semiconductor regions of the first and second semiconductor arms with each other; and a differential transmission line including a first signal transmitting conductor, a second signal transmitting conductor, and a reference potential conductor. The first and second signal transmitting conductors are coupled to the first and second semiconductor arms, respectively.
    Type: Grant
    Filed: September 5, 2018
    Date of Patent: February 18, 2020
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventor: Naoya Kono
  • Patent number: 10558027
    Abstract: The invention relates to a method for concentrating light by coupling light into a thin film waveguide (2, 4) arranged on a substrate (1), in particular via at least one of its parallel surfaces, the method further comprising the step of exciting in the thin-film-waveguide (2, 4) at least one lateral guided mode (5) having at least one node (6), preferably exactly one node (6), by interaction, in particular scattering, diffraction or surface plasmon excitation of the incident light with a nanopatterned discontinuous excitation layer (3) of material, in particular metal, preferably silver, the nanopatterned discontinuous excitation layer (3) being arranged in the thin-film-waveguide (2,4) at the position of the at least one node (6) of the guided lateral mode (5).
    Type: Grant
    Filed: July 2, 2014
    Date of Patent: February 11, 2020
    Assignee: BERGISCHE UNIVERSITAET WUPPERTAL
    Inventor: Patrick Goerrn
  • Patent number: 10559940
    Abstract: The present invention discloses a laser power control system includes a laser diode, a monitor photodiode, a bias control circuit, a modulation control circuit, a digital controller, and a laser diode driver. The laser power control system forms an automatic extinction ratio control loop that is configured to control the extinction ratio of the laser diode by comparing a monitor current with a first target current to keep the extinction ratio of the laser diode at the predetermined first target current. The laser power control system forms an automatic power control loop that is configured to control the average power of the laser diode by comparing the monitor current with the second target current to keep the average power of the laser diode at the predetermined second target current.
    Type: Grant
    Filed: April 1, 2019
    Date of Patent: February 11, 2020
    Assignee: Rafael Microelectronics, Inc.
    Inventors: Meng-Ping Kan, Kuan-Hsun Wang
  • Patent number: 10551620
    Abstract: A heads up display system of a vehicle includes a combiner screen having a first substantially transparent substrate defining a first surface and a second surface, a second substantially transparent substrate defining a third surface and a fourth surface. A primary seal is disposed between the first and second substrates. The seal and the first and second substrates define a cavity therebetween. An electro-optic material is positioned within the cavity and a transflective layer having a multilayer polymeric film positioned on one of the first and second surfaces, and a projector for projecting light having a first polarization toward the first surface of the first substrate.
    Type: Grant
    Filed: January 9, 2018
    Date of Patent: February 4, 2020
    Assignee: GENTEX CORPORATION
    Inventors: David J. Cammenga, William L. Tonar, David L. Poll
  • Patent number: 10551731
    Abstract: An extreme ultraviolet mask and method of manufacture thereof includes: providing a glass-ceramic block; forming a glass-ceramic substrate from the glass-ceramic block; and depositing a planarization layer on the glass-ceramic substrate.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: February 4, 2020
    Assignee: Applied Materials, Inc.
    Inventors: Ralf Hofmann, Majeed Foad, Cara Beasley
  • Patent number: 10544032
    Abstract: A MEMS device includes a plurality of ribbon elements, a securing portion, and a plurality of connecting portions. The securing portion supports the plurality of ribbon elements. The plurality of connecting portions are disposed on ends of each of the plurality of ribbon elements and connect each of the plurality of ribbon elements to the securing portion. An angle formed by a longitudinal extending line of each of the plurality of ribbon elements and each of the plurality of connecting portions is greater than 0° in a planar direction of each of the plurality of ribbon elements.
    Type: Grant
    Filed: January 25, 2018
    Date of Patent: January 28, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Masayuki Fujishima, Hidetaka Noguchi, Hidenori Kato, Junichi Azumi, Masashi Suematsu, Shuichi Suzuki
  • Patent number: 10520758
    Abstract: An optical modulating device includes a permittivity change layer having a variable permittivity, a dielectric layer disposed on the permittivity change layer, a nanoantenna disposed on the dielectric layer, and a light-emitting structure disposed adjacent to the permittivity change layer.
    Type: Grant
    Filed: June 7, 2018
    Date of Patent: December 31, 2019
    Assignees: SAMSUNG ELECTRONICS CO., LTD., CALIFORNIA INSTITUTE OF TECHNOLOGY
    Inventors: Seunghoon Han, Ruzan Sokhoyan, Harry Atwater, Ghazaleh Kafaie, Ragip Pala, Yu-Jung Lu, Ho Wai Lee, Yao-Wei Huang, Krishnan Thyagarajan
  • Patent number: 10509226
    Abstract: A heads up display system of a vehicle includes a combiner screen having a first substantially transparent substrate defining a first surface and a second surface, a second substantially transparent substrate defining a third surface and a fourth surface. A primary seal is disposed between the first and second substrates. The seal and the first and second substrates define a cavity therebetween. An electro-optic material is positioned within the cavity and a transflective layer having a multilayer polymeric film positioned on one of the first and second surfaces, and a projector for projecting light having a first polarization toward the first surface of the first substrate.
    Type: Grant
    Filed: January 9, 2018
    Date of Patent: December 17, 2019
    Assignee: GENTEX CORPORATION
    Inventors: David J. Cammenga, William L. Tonar, David L. Poll
  • Patent number: 10481461
    Abstract: Provided is a reversible electrochemical mirror including a first substrate and a second substrate, which face each other, a first transparent electrode disposed on the first substrate and facing the second substrate, a second transparent electrode disposed on the second substrate and facing the first transparent electrode, an electrolyte solution interposed between the first transparent electrode and the second transparent electrode, and a counter electrode material layer disposed on the second transparent electrode and contacting the electrolyte solution.
    Type: Grant
    Filed: April 4, 2018
    Date of Patent: November 19, 2019
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Seong-Mok Cho, Sujung Kim, Tae-Youb Kim, Juhee Song, Chil Seong Ah, Yong Hae Kim, Joo Yeon Kim, Hojun Ryu, Jeong Ik Lee, Sang Hoon Cheon, Chi-Sun Hwang
  • Patent number: 10481476
    Abstract: An image processing apparatus is provided for generating data used to form on a recording medium an uneven layer on which a plurality of unit areas each having a projection are arranged, including: a first obtaining unit that obtains first brightness information regarding a brightness of a predetermined area of an object observed in a first viewing direction and a brightness of the predetermined area of the object observed in a second viewing direction having an elevation angle different from that of the first viewing direction; and a first generation unit that generates first recording amount data that indicates a recording amount of recording material used to form the uneven layer on the recording medium, the uneven layer being formed such that at least one of a width of each of the unit areas and a height of the projection changes, on a basis of the first brightness information.
    Type: Grant
    Filed: June 20, 2017
    Date of Patent: November 19, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventor: Hideki Kubo
  • Patent number: 10459325
    Abstract: At least one embodiment of an image processing apparatus is provided for generating data used to form on a recording medium an uneven layer having a plurality of projections, including: a first obtaining unit that obtains first brightness information regarding a brightness of a predetermined area of an object observed in a first viewing direction and regarding a brightness of the predetermined area of the object observed in a second viewing direction, the second viewing direction having an azimuth angle different from an azimuth angle of the first viewing direction; and a first generation unit that generates first recording amount data that indicates a recording amount of recording material used to form the uneven layer on the recording medium, the uneven layer having the projections each having a base in a shape that changes, on a basis of the first brightness information.
    Type: Grant
    Filed: June 20, 2017
    Date of Patent: October 29, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventor: Hideki Kubo
  • Patent number: 10459259
    Abstract: Methods and systems for electro-absorption modulator drivers in CMOS may comprise an electro-absorption modulator optically coupled to a laser source and electrically coupled to a modulator driver circuit that is in a complementary metal oxide semiconductor (CMOS) chip. The electro-absorption modulator includes a summer for receiving a negative bias voltage and a programmable offset voltage, a voltage regulator for receiving the output of the summer and generating a negative DC voltage of lower magnitude than the negative bias voltage, level shifting circuitry for shifting a received data signal to a DC voltage level between the negative DC voltage from the voltage regulator and the negative bias voltage, and an electrical coupling structure for DC-coupling the level shifted data signal to the modulator. The bias voltage may be received from an off-chip low drop out (LDO) voltage regulator. The level shifting circuitry may include cascode CMOS transistors and a current mirror.
    Type: Grant
    Filed: January 9, 2018
    Date of Patent: October 29, 2019
    Assignee: Maxlinear, Inc.
    Inventor: Jurgen Hissen
  • Patent number: 10419730
    Abstract: An image projection optical unit includes a digital micromirror device and a prism optical system. The digital micromirror device is configured to drive micromirrors, which are subjected to ON/OFF control, with respect to two axes. The prism optical system is configured to emit, to an image projection side, ON light reflected at the micromirror in an ON state among emitted light the intensity of which has been modulated by the digital micromirror device. An optical path, which is configured to emit, to the image projection side in a direction different from the ON light, OFF light reflected at the micromirror in an OFF state among the emitted light the intensity of which has been modulated by the digital micromirror device, is secured in the prism optical system.
    Type: Grant
    Filed: June 11, 2015
    Date of Patent: September 17, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventor: Masahiro Terada
  • Patent number: 10352819
    Abstract: A image acquisition device comprises a light source unit, a digital micro mirror, an optical transfer medium, an imaging unit, and a beam splitter, wherein a single focusing pattern light is formed to be focused on a single specific point when the focusing pattern light penetrates the optical transfer medium, and specific points focused by each of the plurality of focusing pattern lights scan the object to be measured such that the object to be measured is imaged. Therefore, when an image is obtained through an optical transfer medium such as an optical fiber, pixelation and aberration can be avoided regardless of the type of optical transfer medium and an image having high resolution can be obtained fast without a separate scanner.
    Type: Grant
    Filed: February 26, 2014
    Date of Patent: July 16, 2019
    Assignee: Korea University Research and Business Foundation
    Inventors: Won-Shik Choi, Dong-Gyu Kim
  • Patent number: 10340051
    Abstract: Radioisotope production system includes an electrical field system and a magnetic field system that are configured to direct a particle beam of charged particles along a beam path within an acceleration chamber. The magnetic field system is energized by a drive current to generate a magnetic flux into the acceleration chamber for controlling the particle beam. The radioisotope production system also includes a target system configured to hold a target material and receive the particle beam. The radioisotope production system also includes a monitoring system that is configured to: (a) determine an operating parameter of the radioisotope production system as the particle beam is directed toward the target material and (b) change the drive current, thereby changing the magnetic flux, based on the operating parameter.
    Type: Grant
    Filed: February 16, 2016
    Date of Patent: July 2, 2019
    Assignee: General Electric Company
    Inventors: Martin Pärnaste, Mikael Carlbom, Rickard Ericson, John Melin
  • Patent number: 10330918
    Abstract: A display device includes a first support plate and a second support plate. A pixel region between the first support plate and the second support plate includes a plurality of pixel wall portions over the first support plate forming a perimeter of the pixel region. A first liquid and a second liquid that is immiscible with the first liquid are disposed in the pixel region. A light-blocking layer is disposed on an inner surface of the second support plate. The light-blocking layer includes a light-blocking portion positioned over a first pixel wall portion of the plurality of pixel wall portions. An electrically conductive layer comprising an electrically conductive portion is disposed on a first surface of the light-blocking portion. A recessed region is aligned with the electrically conductive portion such that a portion of the second liquid disposed within the recessed region contacts the electrically conductive portion.
    Type: Grant
    Filed: November 14, 2016
    Date of Patent: June 25, 2019
    Assignee: Amazon Technologies, Inc.
    Inventor: Toru Sakai
  • Patent number: 10324355
    Abstract: Disclosed herein are various improvements in optical switching engines. In one aspect, a range of switching engines includes various multiple bounce, multiple image devices, such as, for example, the Herriott Cell and the Robert Cell. In another aspect, liquid crystal spatial light modulators (SLMs) are used in the switching engine of an optical cross-connect. In another aspect, polarization gratings (PGs) are used in the switching engine. In another aspect, a switching engine includes a Fourier cell using SLMs with more than two states. Alternative imaging optics in a Fourier cell implementing a multiple-bounce, multiple image device are also disclosed.
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: June 18, 2019
    Assignee: OHIO STATE INNOVATION FOUNDATION
    Inventors: David Rabb, Betty Lise Anderson
  • Patent number: 10291165
    Abstract: A method of detecting a permanent magnet rotor of a synchronous machine, includes: injecting a voltage waveform to the stator windings of the synchronous machine, measuring two phase currents in the stator winding, transforming the two phase currents to a rotor reference frame to obtain a current waveform, sampling the current waveform to obtain positive and negative portion values, constructing first and second periodic waveforms by using the sampled positive and negative portion values, performing a frequency analysis of a first and second spectrums of the periodic waveforms, and determining whether a permanent magnet is present in the synchronous machine based on the spectrums.
    Type: Grant
    Filed: November 2, 2017
    Date of Patent: May 14, 2019
    Assignee: ABB Schweiz AG
    Inventors: Paul Sandulescu, Giovanni Zanuso, Luca Peretti
  • Patent number: 10274806
    Abstract: Laser-drilling apparatus includes a gas-discharge for laser emitting laser-radiation pulses, and two acousto-optic modulators (AOMs). The laser radiation pulses are characterized as having two temporal central portions between temporal leading and trailing edge portions. The AOMs are arranged to spatially separate the central temporal portions of the pulses from each other and from the leading and trailing edge portions of the pulses.
    Type: Grant
    Filed: October 31, 2016
    Date of Patent: April 30, 2019
    Assignee: Coherent, Inc.
    Inventors: Gongxue Hua, Eric R. Mueller, Lanny Laughman
  • Patent number: 10267954
    Abstract: A near eye display device and method are provided. The near eye display device including: a display panel and a lens module. The display panel includes a plurality of display areas arranged in an array, each of the display areas includes at least one pixel unit; and the lens module includes a plurality of micro-lenses arranged in an array, which include a plurality of deflection micro-lenses, an end of the deflection micro-lenses close to a center of the lens module is closer to the display panel than an end of the deflection micro-lenses far away from the center of the lens module, each of the display areas corresponds to at least one of the micro-lenses, and an adjacent portion of two adjacent display areas of the display areas corresponds to two different micro-lenses of the micro-lenses, and the two different micro-lenses include at least one of the deflection micro-lenses.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: April 23, 2019
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Can Wang, Yafeng Yang, Jian Gao, Can Zhang, Xinli Ma, Wei Wang, Jifeng Tan, Xiaochuan Chen
  • Patent number: 10250333
    Abstract: Provided is an optical communication system capable of suppressing the deterioration of an intensity waveform of an optical intensity modulated signal subjected to transformation using SSB modulation and improving a bit error ratio and a receiver sensitivity of the optical intensity modulated signal. The optical communication system includes: an optical transmitter section including: a single-side band modulation circuit configured to subject a double-side band modulated signal to generate a single-side band modulated signal; a correction circuit configured to correct an intensity of the single-side band modulated signal so that the intensity of the single-side band modulated signal becomes closer to an intensity of the double-side band modulated signal; and an optical IQ modulator configured to output an optical modulated signal; and an optical receiver section configured to receive the optical modulated signal to directly detect an intensity component of the optical modulated signal.
    Type: Grant
    Filed: October 16, 2018
    Date of Patent: April 2, 2019
    Assignee: Oclaro Japan, Inc.
    Inventor: Nobuhiko Kikuchi
  • Patent number: 10247997
    Abstract: A switchable hydride smart window solid thin film coating having variable opacity and the methods for producing the same is described. The coating includes the following layers deposited on substrate such as glass: a switchable layer, an optional barrier layer, a catalyst layer, an optional barrier layer, a solid electrode, an ion storage layer, an optional insulating layer and a transparent conductor layer. The switchable layer is preferably formed of a magnesium alloy and ore preferable, a ternary alloy of magnesium along with two additional rare earth metals such as yttrium (Y) and Titanium (Ti), i.e., MgYTi.
    Type: Grant
    Filed: August 15, 2017
    Date of Patent: April 2, 2019
    Assignee: CARDINAL CG COMPANY
    Inventors: Keith James Burrows, Klaus H. W. Hartig, Daniel J. Plaggemeyer
  • Patent number: 10234677
    Abstract: An electrowetting display device includes light steering structures that direct incoming light away from pixel walls. According to some configurations, transparent or semi-transparent pixel walls are shielded from incoming light by a black matrix (BM) material in a color filter plate and by the light steering structures. Instead of the incoming light being completely blocked by the black matrix, at least a portion of the incoming light that would have been blocked by the black matrix is directed by one or more of the light steering structures to an area of the pixel such that the brightness of the pixel is increased.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: March 19, 2019
    Assignee: Amazon Technologies, Inc.
    Inventors: Tulasi Sridhar Reddy Guntaka, Karel Johannes Gerhardus Hinnen
  • Patent number: 10234703
    Abstract: An optical modulator uses an optoelectronic phase comparator configured to provide, in the form of an electrical signal, a measure of a phase difference between two optical waves. The phase comparator includes an optical directional coupler having two coupled channels respectively defining two optical inputs for receiving the two optical waves to be compared. Two photodiodes are configured to respectively receive the optical output powers of the two channels of the directional coupler. An electrical circuit is configured to supply, as a measure of the optical phase shift, an electrical signal proportional to the difference between the electrical signals produced by the two photodiodes.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: March 19, 2019
    Assignee: STMICROELECTRONICS SA
    Inventor: Jean-Robert Manouvrier
  • Patent number: 10228604
    Abstract: Systems, methods, and computer-readable media are disclosed for borderless display stacks for use with electronic devices. In one embodiment, a display stack may include a thin film transistor (TFT) layer comprising an active area, an electrophoretic layer coupled to the TFT backplane, and an electrode coupled to a perimeter portion of the electrophoretic layer. The electrode may extend beyond peripheral edges of the electrophoretic layer. A portion of the electrode may be positioned between the electrophoretic layer and the TFT backplane, and the electrode may surround the active area. The display stack may include a cover layer coupled to the electrophoretic layer.
    Type: Grant
    Filed: September 11, 2015
    Date of Patent: March 12, 2019
    Assignee: Amazon Technologies, Inc.
    Inventors: Hany Mounir Ghali, Robert Arthur Sprague, Siddharth Gupta
  • Patent number: 10225529
    Abstract: A projection device is provided for finally displaying a clear desired target image while shortening time until the target image is displayed, the projection device including: a light source; a spatial modulation element reflecting light from the light source by a display unit displaying a phase distribution of a target image; a modulation element control means that performs, in parallel by different arithmetic units, first processing of generating a phase distribution of the target image and second processing of generating a phase distribution of the target image by processing with a calculation cost higher than the first processing, and displays a phase distribution generated by the second processing on a display surface of the spatial modulation element after displaying a phase distribution generated by the first processing on a display surface of the spatial modulation element; and a projection means that projects reflected light from the spatial modulation element.
    Type: Grant
    Filed: July 15, 2016
    Date of Patent: March 5, 2019
    Assignee: NEC CORPORATION
    Inventor: Fujio Okumura
  • Patent number: 10209540
    Abstract: Methods and systems for a low-parasitic silicon high-speed phase modulator are disclosed and may include fabricating an optical phase modulator that comprises a PN junction waveguide formed in a silicon layer, wherein the silicon layer may be on an oxide layer and the oxide layer may be on a silicon substrate. The PN junction waveguide may have p-doped and n-doped regions on opposite sides along a length of the PN junction waveguide, and portions of the p-doped and n-doped regions may be removed. Contacts may be formed on remaining portions of the p-doped and n-doped regions. Portions of the p-doped and n-doped regions may be removed symmetrically about the PN junction waveguide. Portions of the p-doped and n-doped regions may be removed in a staggered fashion along the length of the PN junction waveguide. Etch transition features may be removed along the p-doped and n-doped regions.
    Type: Grant
    Filed: July 16, 2018
    Date of Patent: February 19, 2019
    Assignee: Luxtera, Inc.
    Inventors: Ali Ayazi, Gianlorenzo Masini, Subal Sahni, Attila Mekis, Thierry Pinguet
  • Patent number: 10199793
    Abstract: A method of pumping an optical resonator includes directing light generated by a pumping light at the optical resonator, exciting a propagating surface state of the optical resonator at an interface of the optical resonator, and changing a propagating frequency of the light proximate the interface, where the changed frequency corresponds to a propagation frequency of the surface state. The optical resonator includes a photonic crystal and a material, where the interface is formed between the photonic crystal and the material.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: February 5, 2019
    Assignee: Elwha LLC
    Inventors: Jeffrey A. Bowers, William D. Duncan, Roderick A. Hyde, Jordin T. Kare, Nathan Kundtz, Ruopeng Liu, Bruce M. McWilliams, John B. Pendry, Daniel A. Roberts, David Schurig, David R. Smith, Clarence T. Tegreene, Lowell L. Wood, Jr.
  • Patent number: 10187158
    Abstract: Provided is an optical communication system capable of suppressing the deterioration of an intensity waveform of an optical intensity modulated signal subjected to transformation using SSB modulation and improving a bit error ratio and a receiver sensitivity of the optical intensity modulated signal. The optical communication system includes: an optical transmitter section including: a single-side band modulation circuit configured to subject a double-side band modulated signal to generate a single-side band modulated signal; a correction circuit configured to correct an intensity of the single-side band modulated signal so that the intensity of the single-side band modulated signal becomes closer to an intensity of the double-side band modulated signal; and an optical IQ modulator configured to output an optical modulated signal; and an optical receiver section configured to receive the optical modulated signal to directly detect an intensity component of the optical modulated signal.
    Type: Grant
    Filed: February 27, 2017
    Date of Patent: January 22, 2019
    Assignee: OCLARO JAPAN, INC.
    Inventor: Nobuhiko Kikuchi
  • Patent number: 10185205
    Abstract: Ring modulators based on interdigitated junctions may be driven in full or partial standing wave mode and, active regions (providing the modulation) and light-absorptive regions (e.g. providing electrical conduction) are placed in a pattern inside a resonant cavity in order to match the maxima and minima of the optical field, respectively. The pattern may be periodic to match the periodicity of a typical electromagnetic field which is periodic with the wavelength. It may also be aperiodic in the case that the cross-section or materials are engineered along the direction of propagation such that the propagation constant (and thus wavelength, i.e. optical wave “local periodicity”) change along the propagation direction.
    Type: Grant
    Filed: July 13, 2016
    Date of Patent: January 22, 2019
    Assignee: The Regents of the University of Colorado, a body
    Inventors: Milos Popovic, Fabio Pavanello
  • Patent number: 10184901
    Abstract: A method for designing a filter to image a feature on a surface, comprising: acquiring an image of said feature, with said image of feature comprising information from multiple points of said feature; generating a structural model of said feature by extracting predetermined properties of said feature from said image of feature; computing a scattering model for said feature from said structural model of said feature, with said scattering model for feature having information on scattered electromagnetic field from feature propagating in a plurality of scattering angles, wherein said scattered electromagnetic field from feature is generated by scattering of an electromagnetic radiation by said feature; acquiring an image of said surface, with said image of surface comprising information from multiple points of said surface; generating a structural model of said surface by extracting predetermined properties of said surface from said image of surface; computing a scattering model for said surface from said struct
    Type: Grant
    Filed: January 31, 2017
    Date of Patent: January 22, 2019
    Assignee: Exnodes Inc.
    Inventor: Sri Rama Prasanna Pavani
  • Patent number: 10143041
    Abstract: Provided are a wireless access system provided with a remote unit capable of handling a high-frequency region without being made complicated, and a control method for the same. A wireless access system according to the present invention is provided with: a center unit (1); and a remote unit (3) that converts a baseband signal generated by the center unit (1) into a high-frequency signal and emits the high-frequency signal from an antenna (12). The center unit (1) includes a 1-bit modulator (5) that converts the baseband signal into a 1-bit signal on the basis of a generated clock signal and outputs the 1-bit signal.
    Type: Grant
    Filed: March 7, 2016
    Date of Patent: November 27, 2018
    Assignee: NEC CORPORATION
    Inventors: Shinichi Hori, Tomoyuki Yamase
  • Patent number: 10132462
    Abstract: The invention relates to an optical structure (100) for a motor vehicle headlight lighting device (1) that is set up to emit light forming a specified light pattern (LP1), wherein the optical structure (100) of the lighting device (1) is associated with the lighting device (1), or is part of it in such a way, that the optical structure (100) is transilluminated by essentially the entire luminous flux of the lighting device (1), and wherein the optical structure (100) consists of a number of optical structural elements (110) that have a light-scattering effect and that are designed in such a way that the unmodified light pattern (LP1) produced by the lighting device (1) is modified by the optical structure (100) into a specifiable modified light pattern (LP2), and wherein the optical structural elements (110) have a quadrilateral base area (202), i.e., the area (202) between the vertices (201) of a quadrilateral grid (200) is completely covered by the base area of exactly one optical structural element (110).
    Type: Grant
    Filed: August 28, 2014
    Date of Patent: November 20, 2018
    Assignee: ZKW GROUP GMBH
    Inventors: Andreas Moser, Dietmar Kieslinger, Josef Pürstinger