By Light Interference (e.g., Interferometer) Patents (Class 356/450)
  • Patent number: 11327149
    Abstract: A system for registering multiple point clouds captured by an aircraft is disclosed. The system includes a speckle generator, at least one three-dimensional (3D) scanner, and a processor coupled thereto. In operation, the speckle generator projects a laser speckle pattern onto a surface (e.g., a featureless surface). The at least one 3D scanner scans the featureless surface to generate a plurality of point clouds of the featureless surface and to image at least a portion of the laser speckle pattern. The processor, which is communicatively coupled with the at least one 3D scanner, registers the plurality of point clouds to generate a complete 3D model of the featureless surface based at least in part on the laser speckle pattern.
    Type: Grant
    Filed: January 7, 2020
    Date of Patent: May 10, 2022
    Assignee: Aurora Flight Sciences Corporation
    Inventors: Jae-Woo Choi, James Paduano
  • Patent number: 11293864
    Abstract: The present invention relates to a device, use of the device and a method for high contrast imaging, particularly suitable for imaging of moving object of interest such as gas expanding from a gas jet or physical or chemical or biological processes in material. The device for high-contrast imaging comprises a beam splitter for splitting a beam into a probe beam and a reference-beam, wherein the probe beam is directed to an object; a self-imaging system for receiving the probe beam from the object and imaging the object on itself while in a preferred embodiment, the system preserves a reflected probe beam divergence. The beam interacts with the object at least twice; and the reflected probe beam is further directed to the splitter after the last interaction; and detection means receiving the probe beam from the splitter.
    Type: Grant
    Filed: November 10, 2020
    Date of Patent: April 5, 2022
    Assignee: FYZIKALNI USTAV AV CR, V.V.I.
    Inventors: Jaroslav Nejdl, Martin Albrecht, Jakub Van{hacek over (c)}ura
  • Patent number: 11284786
    Abstract: A system for imaging may include an illumination system that includes a light source to generate a light beam; and a spatial encoding pattern generator comprising one or a plurality of optical elements to encode the imaging beam so as to concurrently illuminate an object by a plurality of different spatial encoding patterns, wherein each encoding pattern of said different encoding patterns is characterized by a distinct wavelength of the imaging pattern. The system may also include an imaging sensor for receiving the encoded imaging beam transmitted through the object or reflected off the object; and a processor for decoding image data from the imaging and reconstructing an image of the object.
    Type: Grant
    Filed: March 7, 2019
    Date of Patent: March 29, 2022
    Assignee: ZSquare Ltd.
    Inventors: Zeev Zalevsky, Omer Itzchak Wagner, Asaf Shahmoon
  • Patent number: 11273454
    Abstract: There is provided system and a separation substrate device for use with an NLM separator in separating and/or detecting at least one target analyte in a sample, the substrate comprising a micromagnet array of a plurality of micromagnets, the micromagnet array comprising a first capture region, a second focusing region, and, a third detection region, the focusing region comprising a converging and/or diverging micromagnet array region. Also provided is a method for separating and detecting at least one target analyte in a sample.
    Type: Grant
    Filed: July 4, 2016
    Date of Patent: March 15, 2022
    Assignee: University College Dublin, National University of Ireland, Dublin
    Inventors: Devrim Kilinc, Peng Li, Gil Lee, Dhruv Ghandi, Stefano Rampini
  • Patent number: 11258518
    Abstract: A circuit and method for mitigating multi-path interference in direct detection optical systems is provided. Samples of an optical signal having a pulse amplitude modulated (PAM) E-field are processed by generating a PAM level for each sample. For each sample, the sample is subtracted from the respective PAM level to generate a corresponding error sample. The error samples are lowpass filtered to produce estimates of multi-path interference (MPI). For each sample, one of the estimates of MPI is combined with the sample to produce an interference-mitigated sample.
    Type: Grant
    Filed: November 18, 2020
    Date of Patent: February 22, 2022
    Assignee: MARVELL ASIA PTE LTD.
    Inventors: Benjamin P. Smith, Jamal Riani, Sudeep Bhoja, Arash Farhoodfar, Vipul Bhatt
  • Patent number: 11231328
    Abstract: An optical analysis method and assembly for analysing an ultrashort laser pulse, the assembly includes a single-shot optical autocorrelator, having a polarity separator for angular separation of an incident laser radiation beam with fundamental frequency (?) into two laser radiation beams with the fundamental frequency and linear polarities which are orthogonal to one another, the two beams forming angle therebetween so that the beams at least partially overlap at the output of the separator, a type-II nonlinear crystal receives the at least partially overlapping beams and generates, at the output of the crystal, a single laser radiation beam with harmonic frequency (2?). A spectral filtering device selectively allows the passage of the single laser radiation beam while blocking the laser radiation beams with fundamental frequency. The non-linear crystal, spectral filtering device, and detection system detect an intensimetric single-shot autocorrelation trace of the order of two at the harmonic frequency.
    Type: Grant
    Filed: October 5, 2018
    Date of Patent: January 25, 2022
    Inventor: Antoine Dubrouil
  • Patent number: 11204319
    Abstract: A method and system are disclosed for use in imaging a sample. The method comprises illuminating a sample through a scattering medium, or illuminating a sub-surface region of the sample through a scattering surface region of the sample, with a plurality of spatial patterns of incident electromagnetic radiation, wherein each spatial pattern of incident electromagnetic radiation interacts with the sample, or the sub-surface region of the sample, to generate electromagnetic radiation in the sample or the sub-surface region of the sample.
    Type: Grant
    Filed: September 20, 2018
    Date of Patent: December 21, 2021
    Assignee: University Court of the University of St Andrews
    Inventor: Kishan Dholakia
  • Patent number: 11181362
    Abstract: A method of measuring a volume of a micro projection includes: measuring a three-dimensional shape of the micro projection using white-light interferometry; comparing a height at which a first peak of an envelope of an interference light intensity is detected with a height of a reference plane, and extracting a projection top portion of the micro projection; detecting a height of the extracted projection top portion; detecting a diameter based on a lateral dimension and a longitudinal dimension of a circumscribed quadrangle in an area that constitutes the projection top portion and a region having a height different from the height of the reference plane, the region including or being in contact with the projection top portion; and calculating the volume of the micro projection based on the height of the projection top portion and the diameter.
    Type: Grant
    Filed: January 10, 2017
    Date of Patent: November 23, 2021
    Assignee: NTN CORPORATION
    Inventor: Hiroaki Ohba
  • Patent number: 11172824
    Abstract: An optical apparatus has an OCT imaging apparatus with a first light source for low coherence light of wavelengths above a threshold wavelength and a signal detector that obtains an interference signal between low coherence light from the sample and low coherence light reflected from a reference. A surface contour imaging apparatus has a second light source that emits one or more wavelengths of surface illumination below the threshold wavelength, a camera to acquire images from illumination reflected from the sample and a probe that has a raster scanner wherein the low coherence light and the surface illumination share the same path from the raster scanner to the sample. A processor coordinates activation of the light sources, actuation of the scanner, and acquisition of data and the camera and follows instructions to display, store, or transfer images from the acquired data.
    Type: Grant
    Filed: May 16, 2016
    Date of Patent: November 16, 2021
    Inventors: Chuanmao Fan, Victor C. Wong
  • Patent number: 11169031
    Abstract: An optical pulse measuring method measuring an optical pulse generated from a pulse light source is provided. The method includes: splitting the optical pulse and then focusing them at a measuring point, so as to generate gas plasma by the autocorrelation of the split optical pulses; receiving the sound signal from the gas plasma and generate a plasma sound signal; and using the plasma sound signal to calculate the characteristics of the optical pulse. A measuring device is also provided.
    Type: Grant
    Filed: October 19, 2018
    Date of Patent: November 9, 2021
    Assignee: NATIONAL CHIAO TUNG UNIVERSITY
    Inventors: Chih-Wei Luo, Yi-Chen Liu, Tien-Tien Yeh
  • Patent number: 11150139
    Abstract: Apparatus and methods of full spatio-temporal characterization of ultrashort pulses from an input pulse-beam source. An interferometer system generates a first, second, third, and fourth replica of the input pulse-beam such that the second replica has a varying delay with respect to the first replica and the fourth replica has a varying delay with respect to the third replica. A reference plane is imaged onto a nonlinear spectral measurement device based upon the first and second replicas, and the reference plane is also imaged onto a wavefront sensitive (WFS) imaging element based on the third and fourth replicas. The signals from the WFS imaging element and the spectral signal are used to compute a pulse temporal spectral profile of the input pulse-beam.
    Type: Grant
    Filed: March 16, 2020
    Date of Patent: October 19, 2021
    Assignee: Kapteyn Murnane Laboratories, Inc.
    Inventors: Henry C. Kapteyn, Daniel E. Adams, Seth L. Cousin
  • Patent number: 11099007
    Abstract: System and method for monitoring of performance of a mirror array of a digital scanner with a use of light, illuminating the mirror array at grazing (off-axis) incidence, and an optical imaging system that includes a lateral shearing interferometer (operated in either static or a phase-shifting condition) during and without interrupting the process of exposure of the workpiece with the digital scanner, to either simply identify problematic pixels for further troubleshooting or measure the exact magnitude of the deformation of a mirror element of the mirror array.
    Type: Grant
    Filed: November 6, 2019
    Date of Patent: August 24, 2021
    Assignee: Nikon Corporation
    Inventor: Eric Peter Goodwin
  • Patent number: 11090546
    Abstract: A measurement device (100) for a golf course green comprises: a distance measurement unit (30) having a pair of laser transmitter/receivers (32) for emitting a pair of laser beams (L; L1, L2), for distance measurement, outwardly at a predetermined emission angle with respect to the forward direction (CEN); a control unit (50) for generating hole-cup position information and hole-cup gradient information from an arithmetic operation of data on the distance measured by the pair of laser transmitter/receivers (32) of the distance measurement unit (30) and data on the emission angle; and an output unit (60) provided outside a casing (10) so as to output the hole-cup position information and hole-cup gradient information generated by the control unit (50).
    Type: Grant
    Filed: June 9, 2017
    Date of Patent: August 17, 2021
    Inventor: Jin Woo Oh
  • Patent number: 11086192
    Abstract: A single shot autocorrelator for measuring duration of an ultrashort laser pulse in the far field, having a beam splitter to form two beams from an input ultrashort pulse: the reflected beam is firstly reflected by two mirrors mounted on a translation stage for adjusting time delay and subsequently a third mirror, and after focused by a spherical convex lens, enters a naturally grown strontium barium niobate crystal along the crystal z axis; the transmitted beam is firstly focused by a spherical convex lens, and after reflected by two mirrors, enters the crystal along the crystal z axis from opposite direction. The crystal is in the common focal regions of two spherical convex lenses and generates the transverse second harmonic pulse beam that is the autocorrelation signal to be recorded, which is imaged with an optical microscope onto a charge coupled device camera mounted perpendicular to the beams.
    Type: Grant
    Filed: March 15, 2019
    Date of Patent: August 10, 2021
    Assignee: Shanghai Institute of Optics And Fine Mechanics, Chinese Academy of Sciences
    Inventors: Jianwei Yu, Jianqiang Zhu, Xiaoping Ouyang, Baoqiang Zhu, Peiying Zeng, Xiaoyun Tang
  • Patent number: 11079420
    Abstract: The invention relates to methods and apparatus for determining properties of a surface.
    Type: Grant
    Filed: April 29, 2019
    Date of Patent: August 3, 2021
    Assignee: Malvern Panalytical Limited
    Inventors: Jason Corbett, Fraser McNeil-Watson, Robert Jack
  • Patent number: 11043015
    Abstract: Techniques for propagating a reflection of an object. In an example, a method includes receiving an input image comprising a first reflection of a first object on a reflective surface. The method further includes generating a second reflection for a second object in the input image. The second reflection is a reflection of the second object on the reflective surface. The method includes adding the second reflection to the input image. The method includes outputting a modified image comprising the first object, first reflection, the second object, and the second reflection.
    Type: Grant
    Filed: August 12, 2019
    Date of Patent: June 22, 2021
    Assignee: Adobe Inc.
    Inventors: Sanjeev Tagra, Sachin Soni, Ajay Jain, Prasenjit Mondal, Jingwan Lu
  • Patent number: 11029258
    Abstract: A measurement system for use in measuring parameters of a patterned sample, the system including a broadband light source, an optical system configured as an interferometric system, a detection unit, and a control unit, where the interferometric system defines illumination and detection channels having a sample arm and a reference arm having a reference reflector, and is configured for inducing an optical path difference between the sample and reference arms, the detection unit for detecting a combined light beam formed by a light beam reflected from the reflector and a light beam propagating from a sample's support, and generating measured data indicative of spectral interference pattern formed by spectral interference signatures, and the control unit for receiving the measured data and applying a model-based processing to the spectral interference pattern for determining one or more parameters of the pattern in the sample.
    Type: Grant
    Filed: December 24, 2018
    Date of Patent: June 8, 2021
    Assignee: NOVA MEASURING INSTRUMENTS LTD.
    Inventors: Gilad Barak, Danny Grossman, Dror Shafir, Yoav Berlatzky, Yanir Hainick
  • Patent number: 11029209
    Abstract: The present application provides a spectral phase interference device and system for addressing the problem of low stability and compactness with prior art spectral phase interference devices. In the device or system provided in the present application, the optical element for generating the pulse pair to be measured consists of only a birefringent crystal and the adjustment of two-step phase shift is also completed by only a broadband quarter-wave plate. Therefore, wide application of optical elements such as pulse stretchers, retarders, optical splitters and mirrors as in prior art devices is avoided, thereby significantly simplifying the overall device's structure and resulting in enhanced stability and compactness at the same time.
    Type: Grant
    Filed: June 6, 2017
    Date of Patent: June 8, 2021
    Assignee: SHENZHEN UNIVERSITY
    Inventors: Shixiang Xu, Shuiqin Zheng, Yi Cai, Qinggang Lin, Huangcheng Shangguan, Junmin Liu
  • Patent number: 11006835
    Abstract: An exemplary optical apparatus has an OCT imaging apparatus with a first light source for low coherence light of wavelengths above a threshold wavelength and a signal detector that obtains an interference signal between low coherence light from the sample and low coherence light reflected from a reference. A surface contour imaging apparatus has a second light source that emits one or more wavelengths of surface illumination below the threshold wavelength, a camera to acquire images from illumination reflected from the sample. The exemplary optical apparatus and/or exemplary methods for using the same can provide reduced errors in generating a dental 3D surface mesh.
    Type: Grant
    Filed: June 29, 2018
    Date of Patent: May 18, 2021
    Inventors: Jean-Marc Inglese, Yannick Glinec, Eamonn Boyle, Eric Vermelle, Marianne Belcari, Arnaud Capri, Victor C. Wong
  • Patent number: 10986996
    Abstract: The present disclosure relates to an OCT device, which can be simply mounted without changing the structure of a microscope or an endoscope, thereby realizing an OCT system and, more particularly, to a removable OCT device including: a tunable laser configured to emit light to the light output side of an optical device by tuning the wavelength of the light; a first beam splitter installed on a path of the light emitted from the tunable laser; and a reference mirror installed on a path of the light that has passed through the first beam splitter, wherein the removable OCT device is mounted at the light output side of the optical device.
    Type: Grant
    Filed: May 27, 2015
    Date of Patent: April 27, 2021
    Assignee: KOH YOUNG TECHNOLOGY INC.
    Inventor: Hyun Ki Lee
  • Patent number: 10962752
    Abstract: It is provided a method for identifying optical aberrations. The method comprising the steps of providing at least one first optical beam and a second optical beam; creating a combined beam by at least partially superimposing the first and the second optical beam; focusing the combined beam into or through a medium and detecting radiation excited in the medium by the combined beam due to nonlinear optical effects; detecting the radiation excited in the medium by the combined beam for each one of the phase positions, the spatial positions and/or the time positions of the first beam; and identifying aberrations using signals generated by a detection device for the plurality of the phase positions, the spatial positions and/or the time positions of the first beam relative to the second beam upon the detection of the radiation excited in the medium.
    Type: Grant
    Filed: April 12, 2017
    Date of Patent: March 30, 2021
    Assignee: CHARITÉ—UNIVERSITÄTSMEDIZIN BERLIN
    Inventors: Benjamin Judkewitz, Ioannis Papadopoulos
  • Patent number: 10957042
    Abstract: A computer-implemented method for analyzing digital holographic microscopy (DHM) data for hematology applications includes receiving a DHM image acquired using a digital holographic microscopy system. The DHM image comprises depictions of one or more cell objects and background. A reference image is generated based on the DHM image. This reference image may then be used to reconstruct a fringe pattern in the DHM image into an optical depth map.
    Type: Grant
    Filed: September 22, 2016
    Date of Patent: March 23, 2021
    Assignee: Siemens Healthcare GmbH
    Inventors: Saikiran Rapaka, Ali Kamen, Noha El-Zehiry, Bogdan Georgescu, Anton Schick, Uwe Philippi, Oliver Hayden, Lukas Richter, Matthias Ugele
  • Patent number: 10942023
    Abstract: An optical coherence tomography system for imaging a sample is configured so as to illuminate a region of interest of the sample with incident light from an optical source. The optical coherence tomography system is further configured so as to interfere, on an optical detector, reference light from the optical source with offset returning light emerging from the sample along an offset collection path which is spatially offset from the region of interest of the sample, thereby creating interference on the optical detector.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: March 9, 2021
    Assignee: UNIVERSITY COURT OF THE UNIVERSITY OF ST ANDREWS
    Inventors: Kishan Dholakia, Mingzhou Chen
  • Patent number: 10935472
    Abstract: Embodiments relate to systems and methods for dissipating heat within a gas detector. A gas detector may comprise an airflow generator configured to generate a sample gas flow through the gas detector; a sample gas flow line configured to direct the sample gas flow within a housing of the gas detector from an inlet of the gas detector toward an outlet of the gas detector; a sensor, in fluid communication with the airflow generator via the sample gas flow line, configured to detect one or more potentially hazardous gases within the sample gas flow; and a heat sink, in fluid communication with the airflow generator and positioned after the sensor along the sample gas flow line, configured to transfer heat from an interior of the housing to the sample gas flow, wherein the sample gas flow is directed out of the housing via the outlet of the gas detector.
    Type: Grant
    Filed: March 7, 2018
    Date of Patent: March 2, 2021
    Assignee: Honeywell International Inc.
    Inventors: SangHoon Hur, Changyoung Jung, Hyungwoo Baek, Jeffrey Lee
  • Patent number: 10928192
    Abstract: An interferometric position sensor for sensing the position of an object is disclosed. The position sensor comprises a light source arranged to emit light, a beam splitter, and a detector array. The beam splitter is arranged to split the light between first and second optical paths, which are configured such that the split light is recombined so as to form an optical interference pattern dependent on the difference between the optical path lengths of the first and second optical paths. The detector array is arranged to measure the intensity of at least a part of the optical interference pattern. At least one of the first and second optical path lengths is arranged to be dependent on the position of the object, such that changes in the optical interference pattern can be related to changes in the position of the object.
    Type: Grant
    Filed: November 2, 2017
    Date of Patent: February 23, 2021
    Assignee: MBDA UK LIMITED
    Inventors: Ross Matthew Williams, Christopher Ralph Carter
  • Patent number: 10931881
    Abstract: A system and corresponding method are presented. The system includes an illumination unit including at least one light source configured for emitting coherent illumination of one or more selected wavelength ranges having selected illumination modulation pattern and for directing the coherent illumination onto one or more selected inspection regions; and a collection unit including at least one detector array and imaging optical arrangement configured for collecting interacting light from the one or more selected inspection regions and for generating corresponding one or more sequences of image data pieces at selected sampling rate. The image data pieces are indicative of secondary speckle patterns formed in collected interacting light. The illumination modulation pattern is selected for increasing temporal bandwidth collection of speckle patterns associated with temporal shifts in the one or more inspection regions.
    Type: Grant
    Filed: September 19, 2019
    Date of Patent: February 23, 2021
    Assignee: CONTINUSE BIOMETRICS LTD.
    Inventors: Zeev Zalevsky, Ran Califa, Zeev Markman, Yevgeny Beiderman
  • Patent number: 10908026
    Abstract: The present disclosure generally relates to laser systems and laser pulse characterization methods and respective systems. An embodiment of the method comprises generating two collinear replicas of the pulse being characterized; applying two different predetermined spectral phases to each replica, so as to simultaneously scan delay and dispersion; applying a nonlinear process to the pulse to be characterized; measuring the resulting signal from the application of the predetermined spectral phases and nonlinear process; applying a numerical iterative algorithm to the measured signal to retrieve the spectral phase of the pulse to be characterized; such process being done as a scanning procedure or in parallel utilizing a single laser shot.
    Type: Grant
    Filed: August 9, 2017
    Date of Patent: February 2, 2021
    Assignee: SPHERE ULTRAFAST PHOTONICS, S.A.
    Inventors: Francisco Jose Maia Da Silva, Helder Manuel Paiva Rebelo Cerejo Crespo, Paulo Tiago Ferraz De Meira Guerreiro, Rosa María Romero Muñiz
  • Patent number: 10895674
    Abstract: A filtering device comprising first and second interference filters each comprising a Fabry-Perot cavity formed by semi-reflective layers between which a structured layer is arranged, wherein the structured layer belongs conjointly to the two filters, has a substantially constant thickness, is substantially planar and comprises two materials with different refractive indices arranged in each of the cavities, forming vertical structurings, the cavity of the second filter comprises a spacer arranged between one of the semi-reflective layers and the structured layer so that a distance between the semi-reflective layers of the cavity of the second filter is greater than a distance between the semi-reflective layers of the cavity of the first filter, and the filters comprise a second structured layer arranged in the cavities of the filters, and/or each filter comprises a second Fabry-Perot cavity comprising a third structured layer.
    Type: Grant
    Filed: January 2, 2020
    Date of Patent: January 19, 2021
    Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
    Inventors: Laurent Frey, Bruno Mourey
  • Patent number: 10883825
    Abstract: A determining method comprises a first computing step implemented by a computational module to compute a static pressure from an altitude determined by a geolocation module, a receiving step implemented by a reception module to receive a static pressure determined by a static pressure sensor, a second computing step implemented by a second computational module to compute a static pressure difference between the static pressure and the static pressure, a step of filtering the static pressure difference, a third computing step implemented by a third computational module in order to compute the backup altitude from the filtered static pressure difference and from the static pressure, and a sending step implemented by a sending module in order to deliver the computed backup altitude to a user device.
    Type: Grant
    Filed: October 1, 2018
    Date of Patent: January 5, 2021
    Assignee: AIRBUS OPERATIONS SAS
    Inventors: Martin Delporte, Guillaume Alcalay
  • Patent number: 10883824
    Abstract: Disclosed are a pattern light irradiating device and an inspection apparatus using the same. The pattern light irradiating device includes first and second pattern light sources installed on a frame having a plurality of through-holes. Each of the through-holes is formed along a single optical axis. The first pattern light source is configured to irradiate first pattern light having a fixed pitch. The second pattern light source is configured to irradiate second pattern light having a variable pitch.
    Type: Grant
    Filed: October 23, 2017
    Date of Patent: January 5, 2021
    Assignee: KOH YOUNG TECHNOLOGY INC.
    Inventors: Jung Hur, Woo Jae Choi
  • Patent number: 10880015
    Abstract: A circuit and method for mitigating multi-path interference in direct detection optical systems is provided. Samples of an optical signal having a pulse amplitude modulated (PAM) E-field are processed by generating a PAM level for each sample. For each sample, the sample is subtracted from the respective PAM level to generate a corresponding error sample. The error samples are lowpass filtered to produce estimates of multi-path interference (MPI). For each sample, one of the estimates of MPI is combined with the sample to produce an interference-mitigated sample.
    Type: Grant
    Filed: February 13, 2020
    Date of Patent: December 29, 2020
    Assignee: INPHI CORPORATION
    Inventors: Benjamin P. Smith, Jamal Riani, Sudeep Bhoja, Arash Farhoodfar, Vipul Bhatt
  • Patent number: 10880497
    Abstract: An imaging system includes an infrared illuminator, an ultrasonic emitter, a reference wavefront generator, and an image pixel array. The infrared illuminator emits a general illumination emission into a three-dimensional diffuse medium, where a portion of the general illumination emission encounters a voxel within the diffuse medium. The ultrasonic emitter focuses an ultrasonic signal to the voxel to wavelength-shift the portion of the general illumination emission to generate a shifted infrared imaging signal. The reference wavefront generator generates an infrared reference wavefront having a same wavelength as the shifted infrared imaging signal. The image pixel array captures an infrared image of an interference between the shifted infrared imaging signal and the infrared reference wavefront.
    Type: Grant
    Filed: October 25, 2019
    Date of Patent: December 29, 2020
    Assignee: Open Water Internet Inc.
    Inventors: Edgar Emilio Morales Delgado, Caitlin Regan, Mary Lou Jepsen
  • Patent number: 10879667
    Abstract: A laser source for emitting a group of pulses, includes a primary laser source suitable for emitting at least one primary laser pulse; at least one interferometer suitable for forming, from the primary laser pulse, a plurality of secondary laser pulses, each interferometer comprising at least one delay line allowing two secondary laser pulses to be temporally separated, by a delay comprised between 50 ps and 10 ns; and a single-mode amplifying optical fiber intended to receive the secondary laser pulses, in order to form as output a group of spatially superposed pulses.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: December 29, 2020
    Assignees: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, INSTITUT NATIONAL DES SCIENCES APPLIQUEES-ROUEN, UNIVERSITE DE ROUEN NORMANDIE
    Inventors: Ammar Hideur, Adil Haboucha, Arnaud Bultel, Said Idlahcen, Thomas Godin
  • Patent number: 10880014
    Abstract: Active relative intensity noise mitigation in nested interferometers using trans-impedance amplifiers is provided by splitting an optical carrier signal into a first version and a second version, wherein the first version is orthogonal to the second version; re-combining predefined portions of the first version and the second version to determine a noise level; modulating at least one of the first version and the second version based on the noise level to reduce the noise level; after modulating the at least one of the first version and the second version based on the noise level, encoding data onto at least one of the first version and the second version; and recombining the first version and the second version to transmit the data.
    Type: Grant
    Filed: January 3, 2020
    Date of Patent: December 29, 2020
    Assignee: Cisco Technology, Inc.
    Inventors: Sanjay Sunder, Romesh Kumar Nandwana, Craig S. Appel
  • Patent number: 10871592
    Abstract: An interrogation system may be coupled to a fiber-optic cable positioned in a wellbore to interrogate a plurality of optical sensors coupled to the fiber-optic cable. The interrogation system may include an optical frequency comb source having a plurality of narrowband optical carriers transmitting light to the plurality of optical sensors. Each of the plurality of optical sensors may include a pair of partial reflectors to reflect the light transmitted by the optical frequency comb to one or more optical receivers to receive the reflection signals In some aspects, the interrogation system may include a de-interleaver device for separating reflected light signals having adjacent wavelength into separate optical waveguides. In additional aspects, interrogation system may also include a data processing system having a processing device for performing interferometric measurements using the reflected light signals.
    Type: Grant
    Filed: November 30, 2015
    Date of Patent: December 22, 2020
    Assignee: Halliburton Energy Services Inc.
    Inventors: Andrew David Barfoot, Han-Sun Choi, Xinwei Lan
  • Patent number: 10838048
    Abstract: An apparatus has a beam steerable laser emitter and a detector array with array elements. Electronics selectively enable first array elements corresponding to expected return signal paths and disable second array elements corresponding to unexpected return signal paths.
    Type: Grant
    Filed: September 8, 2017
    Date of Patent: November 17, 2020
    Assignee: Quanergy Systems, Inc.
    Inventors: Ryan Field, Tomoyuki Izuhara, Louay Eldada
  • Patent number: 10824846
    Abstract: A sensing method for a nanostructure pixel sensor includes shining light from an incident angle onto a nanostructure pixel sensor; capturing an image of nanostructure pixels of the nanostructure pixel sensor; obtaining brightness values of the nanostructure pixels from the image; and determining a presence and/or amount of an analyte based on an image pattern. The nanostructure pixel sensor includes a plurality of the nanostructure pixels. Each of the nanostructure pixels includes periodic nanostructures. At least two nanostructure pixels have different periodic spacings, and the analyte is applied on the nanostructure pixel sensor before capturing the image.
    Type: Grant
    Filed: July 7, 2020
    Date of Patent: November 3, 2020
    Inventor: Bo Xiao
  • Patent number: 10809626
    Abstract: A vector partially coherent source (VPCS) generator includes a laser that emits coherent light; an interferometer consisting of polarizing beam splitters (PBSs) to split the laser light into its vertical and horizontal polarization components;] first and second spatial light modulators (SLMs) that respectively control the vertical and horizontal polarization components; and a control system communicatively coupled to the first and second SLMs to adjust beam shape and coherence without physically moving or removing optical elements in the interferometer.
    Type: Grant
    Filed: October 10, 2018
    Date of Patent: October 20, 2020
    Assignee: The United States of America as represented by the secretary of the Air Force
    Inventors: Milo W. Hyde, IV, Santasri R. Bose-Pillai
  • Patent number: 10790972
    Abstract: Secure, semi-classical authentication schemes are presented. An authentication token is generated by applying a pre-determined measurement to a plurality of random quantum states to obtain a sequence of classical measurement outcomes. The token is validated by receiving the classical measurement outcomes and verifying whether the sequence corresponds to a statistically plausible result for the pre-determined measurement of the plurality of quantum states.
    Type: Grant
    Filed: June 30, 2016
    Date of Patent: September 29, 2020
    Inventor: Adrian Kent
  • Patent number: 10790629
    Abstract: Methods and systems for monitoring a brush holder assembly and/or detecting wear of a brush in a brush holder assembly are disclosed. One method includes sending data from a plurality of remote monitoring locations to a central control unit, where the data may be evaluated in order to monitor states of brushes at a plurality of remote electrical facilities. For example, multiple images of a marker tracking longitudinal movement of the brush may be acquired. A comparison of the images, for example, a comparative imaging technique, such as pixel-by-pixel comparison, may then be performed in order to evaluate a condition of the brush, such as the wear rate, wear state, or life expectancy of the brush.
    Type: Grant
    Filed: February 12, 2019
    Date of Patent: September 29, 2020
    Assignee: CUTSFORTH, INC.
    Inventor: Robert S. Cutsforth
  • Patent number: 10782117
    Abstract: An optical coherence tomography (OCT) system comprises an interferometer configured to generate interference light based on interference between a reference beam and a sample beam with which a sample has been irradiated. A detector operates to detect intensities of the interference light and/or one or more interference patterns; a processor is configured measure a signal falloff of the intensity of the interference light and/or the one or more interference patterns; and an optical delay line configured to adjust an optical path difference according to the signal falloff so as not substantially introduce artifacts to an image of the sample. In one embodiment, the optical delay line includes a main reflector consisting of a mirror and a Faraday rotator; the Faraday rotator is placed between the n and n+1 coherence revival modes of the interferometer, where n is greater than or equal to 1.
    Type: Grant
    Filed: August 31, 2018
    Date of Patent: September 22, 2020
    Assignee: Canon U.S.A., Inc.
    Inventor: Badr Elmaanaoui
  • Patent number: 10760897
    Abstract: An optical sensor includes an optical fiber disposed in such a way that an end surface thereof is exposed in a distal end surface (10a) of a sensor head (10). The optical sensor includes: a first plate material (first metal plate) (20) in close parallel contact with the distal end surface of the sensor head, and in which a through-hole is formed in a position corresponding to the end surface of the optical fiber; and a second plate material (second metal plate) (30) disposed parallel to the first plate material (first metal plate) and toward the front thereof in a measuring direction, and in which a through-hole is formed at a point of intersection with a virtual straight line perpendicular to the end surface of the optical fiber. With this optical sensor, it is possible for clearance measurement to be performed even if the optical fiber becomes opaque or worn.
    Type: Grant
    Filed: June 7, 2017
    Date of Patent: September 1, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Akio Kondou, Tomoyuki Onishi, Takahiro Miyamoto
  • Patent number: 10760956
    Abstract: A wavefront control apparatus includes a detector configured to detect a signal generated from a medium onto which light is irradiated, and a controller configured to control a wavefront of the light based on an output of the detector. The controller performs first processing for forming a first wavefront of the light based on the signal generated from a first measurement position in the medium, and second processing for forming a second wavefront of the light based on the signal generated from a second measurement position different from the first measurement position in the medium onto which the light having the first wavefront is irradiated.
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: September 1, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Takahiro Masumura
  • Patent number: 10666872
    Abstract: Systems and methods disclosed herein include an imaging system that may include a laser diode source; an objective lens positioned to direct a focus tracking beam from the light source onto a location in a sample container and to receive the focus tracking beam reflected from the sample; and an image sensor that may include a plurality of pixel locations to receive focus tracking beam that is reflected off of the location in the sample container, where the reflected focus tracking beam may create a spot on the image sensor. Some examples may further include a laser diode light source that may be operated at a power level that is above a power level for operation at an Amplified Spontaneous Emission (“ASE”) mode, but below a power level for single mode operation.
    Type: Grant
    Filed: March 6, 2018
    Date of Patent: May 26, 2020
    Assignee: ILLUMINA, INC.
    Inventors: Danilo Condello, Simon Prince, David Hargis, Jeffrey Bendick, Christophe Sigel
  • Patent number: 10651619
    Abstract: The optical system comprises: means for introducing a controlled negative or positive chirp to an incoming ultrashort laser pulse to be characterized; a nonlinear optical medium through which said chirped ultrashort laser pulse is propagated, wherein as a result of said propagation: different chirp values are introduced in the ultrashort laser pulse at different propagation distances along the nonlinear optical medium, and a transverse nonlinear signal is generated in a direction perpendicular to the propagation axis; analyzing means configured for recording a single-shot spectral image of said generated transverse nonlinear signal; and a processing module comprising one or more processors configured to execute a numerical iterative algorithm to said single-shot spectral image to retrieve the electric field, amplitude and phase, of the ultrashort laser pulse.
    Type: Grant
    Filed: February 5, 2016
    Date of Patent: May 12, 2020
    Inventors: Jose Francisco Trull-Silvestre, Crina Maria Cojocaru, Inigo Juan Sola-Larranaga, Rosa Maria Romero-Muniz, Francisco Jose Maia Da Silva, Helder Manuel Paiva Rebelo Cerejo Crespo
  • Patent number: 10646874
    Abstract: Instrument for performing a diagnostic test on a fluidic cartridge A cartridge reader is for carrying out a diagnostic test on a sample contained in a fluidic cartridge inserted into the reader. The fluidic cartridge comprises a fluidic layer comprising at least one sample processing region, at least one collapsible blister containing a liquid reagent, a pneumatic interface, an electrical interface and at least one mechanical valve. The reader comprises a housing; an upper clamp occupying a fixed position relative to the reader, and a lower clamp, movable relative to the first clamp, wherein the upper clamp and the lower clamp define a cartridge receiving region therebetween. The reader comprises a thermal module comprised in the lower clamp, wherein the thermal module comprises at least one thermal stack for heating the at least one sample processing region of the cartridge inserted into the reader.
    Type: Grant
    Filed: February 2, 2016
    Date of Patent: May 12, 2020
    Assignee: Binx Health Limited
    Inventors: Ben Arlett, Tom Edwards
  • Patent number: 10627522
    Abstract: The invention is directed to a device and method for conducting measurement of a Doppler shift caused by molecular and aerosol movement while simultaneously providing measurement of temperature using LIDAR. The device incorporates a light source; and a Fabry-Perot etalon having a resonant cavity formed with two plane parallel reflecting surfaces, wherein the light source is positioned relative to the a Fabry-Perot etalon such that light is injected into a plane parallel resonant cavity of the Fabry-Perot etalon at an angle of incidence other than normal to the reflecting surfaces. The Fabry-Perot etalon may be formed with each of the parallel reflecting surfaces having different reflectivities. The light source may be positioned to direct the light to bypass a first reflective surface of the plane parallel resonator cavity, and/or implemented using a divergent light source.
    Type: Grant
    Filed: March 12, 2015
    Date of Patent: April 21, 2020
    Assignee: Michigan Aerospace Corporation
    Inventors: Paul Byron Hays, Scott K. Lindemann
  • Patent number: 10602132
    Abstract: A display apparatus including at least one light source per eye; at least one controllable scanning mirror per eye; means for detecting gaze direction of user; and a processor communicably coupled to the aforementioned components. The processor is configured to (a) obtain an input image and determine region of visual accuracy thereof; (b) generate pixel data corresponding to at least a first region and a second region of the input image, wherein the second region substantially corresponds to the region of visual accuracy of the input image, while the first region substantially corresponds to a remaining region of the input image, wherein the first region have a first resolution, while the second region have a second resolution, the second resolution being higher than the first resolution; and (c) control the at least one light source and the at least one controllable scanning mirror to draw the aforementioned regions.
    Type: Grant
    Filed: March 6, 2018
    Date of Patent: March 24, 2020
    Assignee: VARJO TECHNOLOGIES OY
    Inventors: Ari Antti Erik Peuhkurinen, Oiva Arvo Oskari Sahlsten, Klaus Mikael Melakari
  • Patent number: 10601518
    Abstract: A circuit and method for mitigating multi-path interference in direct detection optical systems is provided. Samples of an optical signal having a pulse amplitude modulated (PAM) E-field are processed by generating a PAM level for each sample. For each sample, the sample is subtracted from the respective PAM level to generate a corresponding error sample. The error samples are lowpass filtered to produce estimates of multi-path interference (MPI). For each sample, one of the estimates of MPI is combined with the sample to produce an interference-mitigated sample.
    Type: Grant
    Filed: January 28, 2019
    Date of Patent: March 24, 2020
    Assignee: INPHI CORPORATION
    Inventors: Benjamin P. Smith, Jamal Riani, Sudeep Bhoja, Arash Farhoodfar, Vipul Bhatt
  • Patent number: 10588512
    Abstract: An optical coherence tomography (OCT) system with dual optical coherence tomography probes is provided comprising: an optical scope comprising a distal end; a first OCT probe; and, a second OCT probe, each of the first OCT probe and the second OCT probe mechanically attached to the optical scope, the first OCT probe and the second OCT probe being substantially paraxial and configured to focus on a same scanning area, the optical scope configured to optically image the same scanning area using the distal end, the first OCT probe having a higher resolution than the second OCT probe.
    Type: Grant
    Filed: March 11, 2015
    Date of Patent: March 17, 2020
    Assignee: SYNAPTIVE MEDICAL (BARBADOS) INC.
    Inventors: Siu Wai Jacky Mak, Michael Frank Gunter Wood