Patents Examined by Rufus L Phillips
  • Patent number: 10444004
    Abstract: The phase shift interferometer is configured to measure the shapes of measurement objects by acquiring a plurality of images of interference fringes while shifting the phases of the interference fringes. The interference fringes are provided with a phase difference of 90° relative to each other utilizing polarization of light. Images of the interference fringes are captured by two respective cameras while, in accordance with a conventional phase shift method, mechanically displacing a reference surface or a reference optical path to shift the phases. The phases of the interference fringes are calculated independently from the respective images acquired by the cameras and an average of the two phase calculation results is calculated.
    Type: Grant
    Filed: October 12, 2017
    Date of Patent: October 15, 2019
    Inventor: Kazuhiko Kawasaki
  • Patent number: 10408812
    Abstract: The present disclosure is directed to a method of altering chemical properties of an in-process resin used with a 3D printing apparatus. The method includes monitoring the in-process resin using an imaging spectrometer, comparing the in-process resin and a model using one or more spectrums from the imaging spectrometer, and diluting the in-process resin with a diluting resin.
    Type: Grant
    Filed: October 12, 2016
    Date of Patent: September 10, 2019
    Assignee: General Electric Company
    Inventors: Stephanie Lynn DePalma, Michael Joseph O'Brien, Brittany Nicole Potter
  • Patent number: 10371499
    Abstract: An optical coherence analysis system uses a laser swept source that is constrained to operate in a mode locked condition. This is accomplished by synchronously changing the laser cavity's gain and/or phase based on the round trip travel time of light in the cavity. Many high-speed wavelength swept laser sources emit pulses synchronized with the round trip time of the cavity as part of a nonlinear optical frequency red shifting process. Stable pulsation is associated with smooth tuning and low relative intensity noise. Addition of mode-locking methods to this class of lasers can control and stabilize these lasers to a low clock jitter and RIN state, and in specific cases allow long-to-short wavelength tuning in addition to the usual short-to-long (red shifting). The laser may comprise a SOA (410), a tunable Fabry-Perot-Filter (412) as one reflector and an Output coupler (405) in an optical fiber (406) to adjust the cavity length.
    Type: Grant
    Filed: December 27, 2011
    Date of Patent: August 6, 2019
    Inventors: Bartley C. Johnson, Dale C. Flanders
  • Patent number: 10371596
    Abstract: There is provided a method and a system for identifying or verifying the fiber arrangement and/or the cable type of multi-fiber array cables (such as MPO cables) which employs an OTDR acquisition device at the near end of the MPO cable, a loopback device at the far end and an array of signatures detectable by the OTDR, either at the far or the near end. The loopback device allows performing bidirectional OTDR measurements with a single OTDR acquisition device (without moving it from one end to the other) and the signature array provides fiber arrangement/cable type identification or verification.
    Type: Grant
    Filed: August 7, 2015
    Date of Patent: August 6, 2019
    Assignee: EXFO Inc.
    Inventors: Mario L'Heureux, Stephane Perron, Michel Leclerc
  • Patent number: 10359507
    Abstract: A LIDAR system includes one or more LIDAR sensor assemblies, which may be mounted to a vehicle or other object. Each LIDAR sensor assembly includes a laser light source to emit laser light, and a light sensor to produce a light signal in response to sensing reflected light corresponding to reflection of the laser light emitted by the laser light source from a reference surface that is fixed in relation to the LIDAR sensor assembly. A controller of the LIDAR sensor assembly may calibrate the LIDAR sensor assembly based at least in part on a signal from the light sensor indicating detection of reflected light corresponding to reflection of a pulse of laser light reflected from the reference surface.
    Type: Grant
    Filed: April 13, 2017
    Date of Patent: July 23, 2019
    Assignee: Panosense Inc.
    Inventors: Adam Berger, Riley Andrews, Ryan McMichael, Denis Nikitin, Brian Alexander Pesch, Brian Pilnick
  • Patent number: 10352686
    Abstract: The present invention relates to a method for calibrating a projection device, in particular a hand-held projection device, in a navigational environment for medical purposes, comprising the steps of: providing a detection device (1) configured to detect light emitted by the projection device (2); determining the spatial position of the detection device (1); projecting a known projection (3), comprising an area (4) configured to stimulate the detection device (1), towards the detection device (1) by means of the projection device (2); determining the position of the projection device (2), particularly in relation to the detection device (1) when the area (4) stimulates the detection device (1).
    Type: Grant
    Filed: November 28, 2011
    Date of Patent: July 16, 2019
    Assignee: Brainlab AG
    Inventors: Troels Frimor, Fritz Vollmer
  • Patent number: 10337928
    Abstract: An autocorrelation measurement device includes a first reflection member, a second reflection member, a focusing unit, a nonlinear optical crystal, a detection unit, a filter, an aperture, a delay adjusting unit, and an analysis unit. Incident pulsed light is transmitted through the second reflection member and incident on the first reflection member. First pulsed light reflected on a first reflection surface of the first reflection member and a second reflection surface of the second reflection member and second pulsed light reflected on a second reflection surface of the first reflection member and a first reflection surface of the second reflection member are incident on the nonlinear optical crystal via the focusing unit. Second harmonic light generated in the nonlinear optical crystal is detected by the detection unit.
    Type: Grant
    Filed: August 24, 2016
    Date of Patent: July 2, 2019
    Inventors: Haruyasu Ito, Yasunori Igasaki, Junji Okuma
  • Patent number: 10330463
    Abstract: Embodiments of a shearography system may include light sources configured to produce beams of light to illuminate a test area. Each of the beams of light may include a different wavelength. A camera may be configured to obtain intensity information corresponding to reflections of the lights off of the test area. An optical shearing device may be disposed in an optical path between the light sources and the camera and the optical shearing device may be configured to provide a shearing angle.
    Type: Grant
    Filed: October 28, 2014
    Date of Patent: June 25, 2019
    Assignee: Oakland University
    Inventors: Lianxiang Yang, Xin Xie, Nan Xu, Xu Chen
  • Patent number: 10324037
    Abstract: An extremely sensitive spectroscopy method utilizes a laser modified to an extremely low emission with an integrated control system, interfaced within a typical Raman platform to comprise low energy laser spectroscopy (LELS). LELS acquires and utilizes a quantum entangled state of photons and particles, including omnipresent cosmological dark matter particles (OCDM) and omnipresent cosmological dark energy (OCDE). The OCDM and OCDE matter has an affinity to particles of same OCDM and OCDE matter in target specimens, with same-time data results of high sensitivity. In a semiconductor light emitter, electron flow at a low energy level is provided to a quantum well to produce a quantum tunneling of electrons into an active region of the laser quantum well and creating sublasering. Sublasering allows OCDM and OCDE to become entangled with other particles and energies in the laser's quantum well and create a transmission package comprising quantum entangled fields, waves, wave packages, states and energies.
    Type: Grant
    Filed: December 3, 2014
    Date of Patent: June 18, 2019
    Inventor: Gustav Hudson
  • Patent number: 10327320
    Abstract: In a high-frequency power supply for plasma having a housing and a high-frequency circuit substrate placed inside the housing elements for supplying a high-frequency current to a high-frequency inductive coil are mounted on the high-frequency circuit substrate, a cooling block for cooling the high-frequency circuit substrate, a fan for sending air to the elements on the high-frequency circuit substrate as wind are further provided, and fins for allowing air to flow through so that the air is cooled are formed on the surface of the cooling block. The housing is provided with an air path for supplying the air that has flown through the fins to the absorbing side of the fan.
    Type: Grant
    Filed: September 3, 2013
    Date of Patent: June 18, 2019
    Inventor: Tomoyoshi Matsushita
  • Patent number: 10317188
    Abstract: An imaging apparatus images an imaging object which is stored in a container having an optical transparent wall part tomographically via the wall part. An FD-OCT imaging apparatus sets an optical path length of a reference light in conjunction with a setting of a focal depth such that a position corresponding to the focal depth is between a position conjugate with a first surface and a position conjugate with a second surface in a reflected light intensity distribution representing a relationship between a position in an incident direction of an illumination light and a reflected light intensity. Here, the first surface is a surface on the imaging object side out of surfaces of the wall part. The second surface is another surface on a side opposite to the imaging object out of the surfaces of the wall part.
    Type: Grant
    Filed: September 21, 2017
    Date of Patent: June 11, 2019
    Inventors: Keisuke Kato, Naoki Ishikawa
  • Patent number: 10302411
    Abstract: In order to measure the contrast of interference in an interference-based, closed-loop, phase-modulating optical sensor device, the gain of the feedback loop in a feedback controller is evaluated. This gain is found to be a measure for the contrast. The contrast evaluated in this way can e.g. be used for period-disambiguation when determining the measurand of the sensor device. The sensor device can e.g. be a high-voltage sensor or a current sensor.
    Type: Grant
    Filed: September 5, 2017
    Date of Patent: May 28, 2019
    Assignee: ABB Schweiz AG
    Inventors: Xun Gu, Sergio Vincenzo Marchese, Klaus Bohnert
  • Patent number: 10295457
    Abstract: The airplane cabin air quality monitoring system comprises a gas monitor. The gas monitor measures the atmosphere within an aircraft for a plurality of potentially hazardous gases. The gas monitor further comprises a plurality of gas sensors, a plurality of compensation sensors, a spectrometer, and a control system. The plurality of gas sensors, the plurality of compensation sensors, the spectrometer, and the control system are electrically interconnected. The control system manages and regulates the operation of the gas monitor. The control system generates an alert if a potentially hazardous gas is detected. The airplane cabin air quality monitoring system further comprises a docking station stores the gas monitor when the gas monitor is not in use. The docking station: 1) recharges the battery of the gas monitor; and, 2) establishes a hardwired first communication link between the gas monitor and the ACARS of the aircraft.
    Type: Grant
    Filed: June 13, 2017
    Date of Patent: May 21, 2019
    Inventor: Larry Ocheltree
  • Patent number: 10288482
    Abstract: Technologies for detecting absorption of electromagnetic radiation traveling through a measurement volume of interest are described herein. In a general embodiment, a laser is used to emit electromagnetic radiation through the measurement volume where absorption is desirably detected. An optical collector receives a portion of the radiation and directs a first fraction of the portion back to a gain medium of the laser, where the radiation is amplified and emitted again, and directs a second fraction to an optical sensor that can detect absorption in the measurement volume based upon attenuation of energy of the radiation. As the radiation feeds back to the gain medium and is emitted again, energy at attenuated wavelengths is amplified less than at other wavelengths. Thus, attenuation of energy of the radiation due to absorption in the measurement volume is cumulative, and relatively small absorptions are amplified, allowing smaller absorptions to be detected more easily.
    Type: Grant
    Filed: February 3, 2016
    Date of Patent: May 14, 2019
    Assignee: National Technology & Engineering Solutions of Sandia, LLC
    Inventor: Mark W. Smith
  • Patent number: 10288416
    Abstract: An interference fringe projection apparatus includes light source units that selectively emit light from a coherent light source from one of a plurality of optical emitters, a polarization-maintaining waveguide unit with a plurality of PANDA fibers (polarization-maintaining waveguides) that each guide light emitted from one of the plurality of optical emitters, polarization splitters that split an optical path of light emitted from each of the PANDA fibers by polarization direction, and a polarizing film that transmits only a linear polarization component in a particular direction of light split by the polarization splitter. The light source unit only emits linearly polarized light in one polarization-maintaining direction for at least one of the PANDA fibers, and the polarization-maintaining waveguide unit causes retardation of light emitted from the PANDA fibers to vary.
    Type: Grant
    Filed: November 15, 2017
    Date of Patent: May 14, 2019
    Inventor: Daichi Watanabe
  • Patent number: 10288406
    Abstract: A laser component includes multiple laser devices arranged in an array to include different emission wavelengths, and a driving unit that, while switching each of the laser devices along the array into a turn-ON-enabled state that enables the laser device to turn to an ON state, brings one of the laser devices in the turn-ON-enabled state into an ON state.
    Type: Grant
    Filed: June 21, 2017
    Date of Patent: May 14, 2019
    Assignee: FUJI XEROX CO., LTD.
    Inventor: Takashi Kondo
  • Patent number: 10267740
    Abstract: A method of detecting a tracer compound dissolved in a liquid composition via surface-enhanced spectroscopy includes the steps of: a. optionally, diluting the liquid composition or the separated liquid by mixing with a diluent liquid; b. bringing a sample of the separated liquid into contact with, a spectroscopy-enhancing surface including gold, silver or copper; c. obtaining a Raman spectrum from the sample; and d. calculating, from the spectrum, the concentration of the tracer in the sample relative to the concentration of a second component of the composition.
    Type: Grant
    Filed: March 28, 2013
    Date of Patent: April 23, 2019
    Assignee: Johnson Matthey Public Limited Company
    Inventors: Vincent Brian Croud, Elizabeth Ruth Egginton, Clive Anthony Marchant, Duncan William John McCallien, Alistair McInroy, David Eustace, Graeme McNay