By Light Interference (e.g., Interferometer) Patents (Class 356/450)
  • Patent number: 11656072
    Abstract: A method for validating the placement of pieces in an assembly task by scanning a coherent light source, such as a laser, over a surface and characterizing the detected interference speckle pattern to discriminate the position of the placed piece from the surface on which the piece is placed. This discrimination is possible even if the characteristic features of the piece and background are smaller than the resolution of the scanning system. In addition, characteristics of the piece, such as the orientation of fibers in the material, may be sensed by classification of the associated speckle response.
    Type: Grant
    Filed: July 1, 2021
    Date of Patent: May 23, 2023
    Assignee: VIRTEK VISION INTERNATIONAL INC.
    Inventor: Kurt D Rueb
  • Patent number: 11650479
    Abstract: A passive photonics reservoir computing system comprises an optical waveguide based structure comprising a plurality of discrete nodes and a plurality of passive waveguide interconnections between the nodes for propagating the at least one photonic signal between the nodes, in which each discrete node is adapted for passively relaying the at least one photonic wave over the passive waveguide interconnections connected thereto, wherein the optical waveguide based structure comprises at least one multimode Y-junction configured for connecting three waveguides using a taper section wherein the taper section is not perfectly adiabatic. A training scheme uses a passive photonics computing system.
    Type: Grant
    Filed: May 26, 2018
    Date of Patent: May 16, 2023
    Assignee: IMEC VZW
    Inventors: Peter Bienstman, Andrew Katumba, Jelle Heyvaert, Joni Dambre
  • Patent number: 11635377
    Abstract: A high-speed device, for inspecting a large area of an object, which includes: a terahertz wave generation portion configured to generate a terahertz wave; a ring beam forming portion configured to form a ring beam by using the terahertz wave incident from the terahertz wave generation portion; a rotary mirror configured to reflect the ring beam formed by the ring beam forming portion while rotating to allow the ring beam to be incident on an inspection target object; and a detector configured to detect a ring beam generated from the inspection target object.
    Type: Grant
    Filed: February 9, 2018
    Date of Patent: April 25, 2023
    Assignee: KOREA FOOD RESEARCH INSTITUTE
    Inventors: Gyeong-Sik Ok, Hee-Jun Shin, Sung-Wook Choi
  • Patent number: 11594070
    Abstract: An object detection training method can include receiving a training sample set in a current iteration of an object detection training process over an object detection neural network. The training sample set can include first samples of a first class and second samples of a second class. A first center loss value of each of the first and second samples can be determined. The first center loss value can be a distance between a feature vector of the respective sample and a center feature vector of the first or second class which the respective sample belongs to. A second center loss value of the training sample set can be determined according to the first center loss values of the first and second samples. A first target loss value of the current iteration can be determined according to the second center loss value of the training sample set.
    Type: Grant
    Filed: December 2, 2020
    Date of Patent: February 28, 2023
    Assignee: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED
    Inventors: Hao Wang, Zhifeng Li, Xing Ji, Fan Jia, Yitong Wang
  • Patent number: 11593699
    Abstract: An apparatus includes a light source to provide a plurality of input optical modes in a squeezed state. The apparatus also includes a network of interconnected reconfigurable beam splitters (RBSs) configured to perform a unitary transformation of the plurality of input optical modes to generate a plurality of output optical modes. An array of photon counting detectors is in optical communication with the network of interconnected RBSs and configured to measure the number of photons in each mode of the plurality of the output optical modes after the unitary transformation. The apparatus also includes a controller operatively coupled to the light source and the network of interconnected RBSs. The controller is configured to control at least one of the squeezing factor of the squeezed state of light, the angle of the unitary transformation, or the phase of the unitary transformation.
    Type: Grant
    Filed: October 27, 2021
    Date of Patent: February 28, 2023
    Assignee: Xanadu Quantum Technologies Inc.
    Inventors: Kamil Bradler, Daiqin Su, Nathan Killoran, Maria Schuld, Zachary Vernon, Lukas Helt, Blair Morrison, Dylan Mahler
  • Patent number: 11578963
    Abstract: A first light source outputs measurement light having a wavelength in infrared range. A second light source outputs guide light having a wavelength in visible range. A fiber coupler includes a first port into which the measurement light is input, a second port into which the guide light is input, and a third port outputting combined light formed by combining the measurement light and the guide light with each other. A measurement unit emits the combined light to a measurement object and receives return light reflected therefrom. A processing unit obtains information relating to a distance, a speed, or an oscillation of the measurement object, based on an interference signal of the return light and the reference light. The fiber coupler is formed by a single mode fiber that has a cutoff wavelength that is shorter than that of the measurement light and longer than that of the guide light.
    Type: Grant
    Filed: February 12, 2021
    Date of Patent: February 14, 2023
    Assignee: OMRON Corporation
    Inventors: Kazuya Kimura, Masayuki Hayakawa
  • Patent number: 11555742
    Abstract: Systems for confocal Raman spectroscopy of points of interest or regions of interest with concurrent imaging are disclosed. The imaging may be used for real time selection of points of interest or regions of interest for Raman spectroscopy and to monitor for unwanted motions of a sample while Raman spectra are acquired. Disclosed embodiments apply Reflectance confocal microscopy (RCM) in a confocal Raman spectroscopy system. A single laser may be used as a light source for both RCM and micro-Raman spectroscopy. A Faraday optical isolator may be applied to extract RCM signals for imaging Systems as described herein have example application for ex vivo sample and in vivo skin measurement.
    Type: Grant
    Filed: September 4, 2019
    Date of Patent: January 17, 2023
    Assignee: Provincial Health Services Authority
    Inventors: Zhenguo Wu, Haishan Zeng, Jianhua Zhao, Liwei Jiang
  • Patent number: 11525737
    Abstract: The invention provides a wavelength tracking system comprising a wavelength tracking unit and an interferometer system. The wavelength tracking unit has reflection surfaces at stabile positions providing a first reflection path with a first path length and a second reflection path with a second path length. The first path length is substantially larger than the second path length.
    Type: Grant
    Filed: January 15, 2019
    Date of Patent: December 13, 2022
    Assignee: ASML Netherland B.V.
    Inventor: Maarten Jozef Jansen
  • Patent number: 11522334
    Abstract: Methods and devices are described for performing an all-phase measurement of an ultra-fast laser pulse having a spectral range of greater than one octave. The ultra-fast laser pulse may be split into a first beam comprising a fundamental light with a wavelength ?0 and a second beam comprising a light with a wavelength 2?0. The light with the wavelength 2?0 may be frequency doubled to a light with a wavelength ?0 to generate an interference with the fundamental light. Fourier transform may be performed on an interference spectrum of the interference, and a relative envelope delay (RED) between the fundamental light and the frequency doubled light and a carrier envelope phase (CEP) may be acquired based on a result of the Fourier transform.
    Type: Grant
    Filed: May 27, 2020
    Date of Patent: December 6, 2022
    Assignee: INSTITUTE OF PHYSICS, CHINESE ACADEMY OF SCIENCES
    Inventors: Shaobo Fang, Zhiyi Wei, Pei Huang, Yitan Gao, Kun Zhao
  • Patent number: 11499866
    Abstract: The invention relates to the technical field of mechanical vibration measurement, and discloses a device for accurately measuring mechanical vibration by photon counter. The device comprises a laser, an optical isolator, an adjustable attenuator, an optical fiber coupler, a single-photon counter and an FPGA post-processing module, wherein the laser enters the optical fiber coupler after passing through the optical isolator and the adjustable attenuator, and then enters into a measured object. The transmitted signal of the object to be measured returns to the optical fiber coupler and is output to the single-photon counter; the mechanical vibration of the measured object is analysed and obtained by the FPGA post-processing module connecting with the output terminal of the single-photon counter.
    Type: Grant
    Filed: April 22, 2021
    Date of Patent: November 15, 2022
    Assignee: TAIYUAN UNIVERSITY OF TECHNOLOGY
    Inventors: Yanqiang Guo, Ziqing Wang, Xiaomin Guo
  • Patent number: 11474256
    Abstract: A data processing device of the present invention includes: a data communication device configured to communicate with a laser radar device to acquire a value of line-of-sight wind-speed, a laser emission angle, attitude information, position information, and a time; a storage device configured to store the value of line-of-sight wind-speed and the time; a central processing unit configured to run a data selector to select a value of line-of-sight wind-speed stored in the storage device and being present within a set time period from a time about the value of line-of-sight wind-speed which is newly acquired by the data communication device, and configured to run a wind vector calculator to calculate a wind vector using the newly acquired value of line-of-sight wind-speed and using the selected value of line-of-sight wind-speed; and a memory configured to preserve the data selector and the wind vector calculator.
    Type: Grant
    Filed: November 28, 2016
    Date of Patent: October 18, 2022
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Nobuki Kotake, Shumpei Kameyama
  • Patent number: 11460617
    Abstract: Provided are an imaging apparatus capable of acquiring an image having a small transmission wavelength shift at a plurality of wavelengths and an image processing apparatus capable of measuring a subject on the basis of an image which has a small transmission wavelength shift and which is acquired at a plurality of wavelengths. High image height rays imaged at a position of which an image height is high is incident at a large angle with respect to the optical axis. Therefore, the transmission wavelength shift increases. However, in the imaging apparatus according to the first aspect, the first optical system causes the high image height rays to be incident into the first optical filter and the second optical filter in a state where the upper ray and the lower ray are parallel.
    Type: Grant
    Filed: April 5, 2020
    Date of Patent: October 4, 2022
    Assignee: FUJIFILM Corporation
    Inventor: Shuji Ono
  • Patent number: 11463163
    Abstract: The purpose of the present invention is to provide a device for optical frequency domain reflectometry and a method thereof that can measure a reflectance distribution with less spatial resolution degradation due to a phase noise, without using a wideband receiving system even when a long-distance measurement is performed.
    Type: Grant
    Filed: January 29, 2020
    Date of Patent: October 4, 2022
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Tatsuya Okamoto, Daisuke Iida, Hiroyuki Oshida
  • Patent number: 11438059
    Abstract: An improved technique for acoustic sensing involves, in one embodiment, launching into a medium, a plurality of groups of pulse-modulated electromagnetic-waves. The frequency of electromagnetic waves in a pulse within a group differs from the frequency of the electromagnetic waves in another pulse within the group. The energy scattered by the medium is detected and, in one embodiment, the beat signal may be used to determine a characteristic of the environment of the medium. For example, if the medium is a buried optical fiber into which light pulses have been launched in accordance with the invention, the presence of acoustic waves within the region of the buried fiber can be detected.
    Type: Grant
    Filed: April 5, 2021
    Date of Patent: September 6, 2022
    Assignee: AT&T Intellectual Property II, L.P.
    Inventors: Andrew Lewis, Stuart Russell
  • Patent number: 11426067
    Abstract: A method for analyzing the wavefront effect of an optical system includes: illuminating a measurement mask (110, 310) with illumination light, producing an interferogram in a specified plane using a diffraction grating (150) from a wavefront from the illuminated measurement mask and traveling through the optical system; and capturing the interferogram with a detector (170). Different angular distributions of the illumination light incident on the measurement mask are produced via a mirror arrangement of independently settable mirror elements. A plurality of interferograms are captured in a plurality of measurement steps, wherein these measurement steps differ respectively in angular distribution of the illumination light that is incident on the measurement mask.
    Type: Grant
    Filed: March 26, 2020
    Date of Patent: August 30, 2022
    Assignee: CARL ZEISS SMT GMBH
    Inventor: Rolf Freimann
  • Patent number: 11431409
    Abstract: An improved technique for acoustic sensing involves, in one embodiment, launching into a medium, a plurality of groups of pulse-modulated electromagnetic-waves. The frequency of electromagnetic waves in a pulse within a group differs from the frequency of the electromagnetic waves in another pulse within the group. The energy scattered by the medium is detected and, in one embodiment, may be used to determine a characteristic of the environment of the medium. For example, if the medium is a buried optical fiber into which light pulses have been launched in accordance with the invention, the presence of acoustic waves within the region of the buried fiber can be detected.
    Type: Grant
    Filed: April 5, 2021
    Date of Patent: August 30, 2022
    Assignee: AT&T Intellectual Property II, L.P.
    Inventors: Justin Hayward, Andrew B. Lewis, Stuart Russell
  • Patent number: 11415461
    Abstract: A method comprising forming a linear temporal non-stationary amplitude filter by interacting a high intensity ultrashort laser pump pulse with a photo-excitable material, focusing an ultrashort broadband laser probe pulse over the photo-excited material, acquiring a two-dimensional spectrogram and retrieving amplitudes and phases of both temporal probe pulse and linear non-stationary amplitude filter from the two-dimensional spectrogram.
    Type: Grant
    Filed: September 24, 2018
    Date of Patent: August 16, 2022
    Inventors: Philippe Lassonde, Guilmot Ernotte, Bruno E. Schmidt, François Légaré, Stéphane Petit, Jean-Christophe Delagnes, Eric Cormier, Adrien Leblanc
  • Patent number: 11394470
    Abstract: A method of communicating through the earth which includes the steps of using a digital pulse train to generate a sweep pulse train which controls the frequency of a magnetic field at a first location, and at a second location, detecting the magnetic field and producing a signal at a frequency dependent on the frequency of the sweep pulse train, and extracting a replica of the digital pulse train from the signal.
    Type: Grant
    Filed: March 26, 2019
    Date of Patent: July 19, 2022
    Assignee: DETNET SOUTH AFRICA (PTY) LTD
    Inventor: Gerhard Brink Louw
  • Patent number: 11371887
    Abstract: Systems and methods are provided for filtering coherent infrared light from a thermal background for protection of infrared (IR) imaging arrays and detection systems. A Michelson interferometer is used for coherent light filtering. In an implementation, a system includes a fixed mirror, a beam splitter, and a moving mirror which can be controlled translationally, as well as tip/tilt. The Michelson interferometer may be used as an imaging system. For imaging applications, a system may comprise a tunable array of micro-electromechanical systems (MEMS) mirrors. A mid-wave IR interferometer with electronic feedback and MEMS mirror array is provided.
    Type: Grant
    Filed: July 24, 2020
    Date of Patent: June 28, 2022
    Assignees: BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM, U.S. DEPARTMENT OF ENERGY
    Inventors: Daniel Wasserman, Eric A. Shaner
  • 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: 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: 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: 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: 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