Optical Waveguide Sensor Patents (Class 385/12)
  • Patent number: 11402334
    Abstract: A photonic integrated circuit for an interferometric sensor includes a first waveguide called sensitive arm wherein a first portion of the light radiation is propagated, the sensitive arm being exposed to a first ambient medium and to at least one compound to be detected inducing a modification of the local refractive index perceived by the evanescent part of the electromagnetic field of the first portion of the light radiation, and a second waveguide called reference arm wherein a second portion of the light radiation is propagated, an encapsulation layer encapsulating the reference arm, the encapsulation layer being impermeable to the compound or compounds to be detected, so that the reference arm is exposed only to a second ambient medium, substantially of the same nature as the first ambient medium and without the compound to be detected and interferometric sensor comprising a photonic integrated circuit according to the invention.
    Type: Grant
    Filed: June 16, 2020
    Date of Patent: August 2, 2022
    Assignees: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES, ARYBALLE
    Inventors: Loïc Laplatine, Mathieu Dupoy, Maryse Fournier, Pierre Labeye, Thierry Livache, Cyril Herrier
  • Patent number: 11391938
    Abstract: A microscope lens system includes a body having a surface, a microlens, and an aperture positioned between the microlens and the surface. In the embodiment, the body is configured to position a mobile device on the surface such that a camera lens of the mobile device is aligned with the aperture.
    Type: Grant
    Filed: August 13, 2019
    Date of Patent: July 19, 2022
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Venkat Balagurusamy, Brian Pear
  • Patent number: 11385108
    Abstract: An example microelectromechanical system (MEMS) force sensor is described herein. The MEMS force sensor can include a sensor die configured to receive an applied force. The sensor die can include a first substrate and a second substrate, where a cavity is formed in the first substrate, and where at least a portion of the second substrate defines a deformable membrane. The MEMS force sensor can also include an etch stop layer arranged between the first substrate and the second substrate, and a sensing element arranged on a surface of the second substrate. The sensing element can be configured to convert a strain on the surface of the membrane substrate to an analog electrical signal that is proportional to the strain.
    Type: Grant
    Filed: November 2, 2018
    Date of Patent: July 12, 2022
    Assignee: NEXTINPUT, INC.
    Inventors: Julius Minglin Tsai, Ryan Diestelhorst, Dan Benjamin
  • Patent number: 11378443
    Abstract: Aspects of the present disclosure describe systems, methods and apparatus for improving the performance of Rayleigh-based phase-OTDR with correlation-based diversity combining and bias removal.
    Type: Grant
    Filed: May 20, 2020
    Date of Patent: July 5, 2022
    Inventors: Ezra Ip, Yue-Kai Huang
  • Patent number: 11373967
    Abstract: A semiconductor device package includes a first semiconductor device; a second semiconductor device; and a first redistribution layer disposed on the first semiconductor device and having a side wall defining an opening that exposes the first semiconductor device. The side wall of the first redistribution layer has an average surface roughness (Ra) in a range up to 2 micrometers (?m).
    Type: Grant
    Filed: November 14, 2019
    Date of Patent: June 28, 2022
    Assignee: ADVANCED SEMICONDUCTOR ENGINEERING, INC.
    Inventors: Yung-Shun Chang, Teck-Chong Lee, Sheng-Wen Yang
  • Patent number: 11364347
    Abstract: A plunger assembly is configured for slidable advancement through a reservoir of a vessel containing a material to be administered. The plunger assembly includes a plunger rod having a distal end configured to be inserted into the reservoir. An elastomeric plunger extending from the distal end of the plunger rod is configured to sealingly engage a sidewall of the reservoir. At least one printed circuit board is embedded within the plunger, and at least one electronic component is electrically connected with the at least one printed circuit board.
    Type: Grant
    Filed: October 18, 2019
    Date of Patent: June 21, 2022
    Assignee: West Pharmaceutical Services, Inc.
    Inventor: Jason Krizan
  • Patent number: 11360035
    Abstract: A method for measuring a fiber orientation degree includes: irradiating a sample formed of a composite material containing discontinuous carbon fibers with an X-ray to acquire an X-ray diffraction image; calculating an angle (2?)A of a peak originating from a crystal face of graphite; calculating a correction coefficient ? of a thickness of the sample; calculating an upper limit (2?)B of the peak of the crystal face of graphite; calculating a diffraction sensitivity IC(?) of the peak originating from the crystal face of graphite by correcting an integrating range with the correction coefficient ? and integrating the X-ray diffraction image with respect to a diffraction angle (2?); and calculating a fiber orientation degree Sd(?) by the method of Hermans from the diffraction sensitivity IC(?).
    Type: Grant
    Filed: October 2, 2018
    Date of Patent: June 14, 2022
    Assignees: NATIONAL UNIVERSITY CORPORATION TOKAI NATIONAL HIGHER EDUCATION AND RESEARCH SYSTEM, TORAY INDUSTRIES, INC., KYOWA INDUSTRIAL CO., LTD.
    Inventors: Atsuhiko Yamanaka, Mariko Terada, Yukitane Kimoto, Koji Shiraki, Yuji Hotta, Daisuke Shimamoto
  • Patent number: 11340131
    Abstract: Systems, methods, and apparatuses for taking pressure measurements are provided. A multi-hole pressure sensor probe can include a probe tip having a plurality of probe tip holes. The probe tip holes can lead to probe tip channels that convey fluid from the measurement environment to pressure transducers. The pressure transducers can operate using optical transduction techniques. A light source can be applied to the diaphragm, and the light reflected from the diaphragm changes as the position of the diaphragm changes. Further, a reflective material can be applied on the backside of the diaphragm to increase its reflective properties. The light can then be collected and analyzed using a photodiode to determine the environmental pressure acting on the different holes of the probe.
    Type: Grant
    Filed: October 19, 2018
    Date of Patent: May 24, 2022
    Assignee: UNIVERSITY OF FLORIDA RESEARCH FOUNDATION, INCORPORATED
    Inventors: Haocheng Zhou, Mark Sheplak
  • Patent number: 11320614
    Abstract: A fiber optic cable includes a plurality of optical fibers and an optical sensor. The optical sensor includes a first optical coupler and a first mirror. The first optical coupler is coupled to a first of the optical fibers and to a second of the optical fibers at a first sensor takeout location. The first mirror is coupled to the first of the optical fibers at a second sensor takeout location. The first sensor takeout location is longitudinally offset from the second sensor takeout location.
    Type: Grant
    Filed: August 28, 2019
    Date of Patent: May 3, 2022
    Assignee: Geospace Technologies Corporation
    Inventor: Steven James Maas
  • Patent number: 11313798
    Abstract: An optical measuring device for measuring light emitted from a sample includes a container cavity for receiving a container in which the sample is enclosed; a light detection unit for detecting light from the sample; a light guide path for guiding the light from the sample to the light detection unit; and a light absorbing unit for absorbing incident light. An end of the light guide path to receive the incident light faces the container cavity, a light exit end of the light guide path faces the light detection unit, and the light absorbing unit covers the perimeter of the light guide path other than the light-receiving-end and the light exit end thereof.
    Type: Grant
    Filed: June 29, 2018
    Date of Patent: April 26, 2022
    Assignees: KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, Ushio Denki Kabushiki Kaisha
    Inventors: Yuji Oki, Kinichi Morita
  • Patent number: 11311203
    Abstract: A microcirculation detection system including a heating device, a photosensitive array and a processing unit is provided. The heating device is used to heat a skin area. The photosensitive array is used to detect outgoing light from the skin area, and output a plurality of brightness variation signals respectively at different time points within a heating period. The processing unit is used to calculate a change of an array energy distribution varied within the heating period according to the plurality of brightness variation signals to accordingly identify a microcirculation state.
    Type: Grant
    Filed: March 18, 2019
    Date of Patent: April 26, 2022
    Assignee: PIXART IMAGING INC.
    Inventors: Wei-Ru Han, Chih-Yuan Chuang
  • Patent number: 11307343
    Abstract: A backlight unit may include: a light source providing coherent light; a light guide plate having a light entrance surface on which light from the light source is incident and a light exit surface through which the light is output; a plurality of diffraction gratings (for example, a first input grating, a second input grating, and a third input grating) that are arranged in different regions of the light guide plate to sequentially diffract the light from the light source such that that the beam width of the light may increase as the light propagates in the light guide plate; and a diffraction grating (for example, an output grating) that diffracts and outputs the light having an increased beam width in a direction toward the outside of the light guide plate.
    Type: Grant
    Filed: November 6, 2019
    Date of Patent: April 19, 2022
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Chilsung Choi, Hoon Song, Jungkwuen An, Hongseok Lee
  • Patent number: 11294001
    Abstract: An optical fiber-mounted field sensor for measuring an electric or magnetic field includes an optical fiber configured to receive light from a laser source, a polarizer, a polarization manipulator, electro-optical material or magneto-optical material adjacent to the polarization manipulator, and a high reflection coating. The polarizer is adjacent to an output of the fiber, while the polarization manipulator is adjacent to the polarizer and opposite of the optical fiber. The electro-optical material or magneto-optical material is adjacent to the polarization manipulator, and the high reflection coating is adjacent to the electro-optical material or magneto-optical material. An optical mainframe for sending and receiving optical beams to and from the optical fiber-mounted field sensor is also described.
    Type: Grant
    Filed: June 30, 2020
    Date of Patent: April 5, 2022
    Assignee: Advanced Fiber Sensors, Inc.
    Inventors: Kyoung Yang, John Whitaker
  • Patent number: 11283304
    Abstract: A rectenna device (400) for converting incident light to electrical energy is disclosed. The rectenna device comprises a substrate (402), a first metallic layer (404) having a predefined thickness deposited on top of the substrate, a rectifying element (405) deposited on top of the first metallic layer, a second metallic layer (408) deposited on top of said rectifying element and configured to collect electromagnetic waves of the incident light and to couple it into plasmonic waves within the rectenna device, the second metallic layer comprising an array of a plurality of metallic patches (410) spaced from each other according to a predefined spacing, each metallic patch having predefined dimensions.
    Type: Grant
    Filed: November 28, 2018
    Date of Patent: March 22, 2022
    Assignees: UNIVERSITE D'AIX-MARSEILLE, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, ECOLE CENTRALE DE MARSEILLE, UNIVERSITE DE TOULON
    Inventors: David Duche, Ludovic Escoubas, Ujwol Palanchoke, Jean-Jacques Simon, Teodor Silvius Balaban
  • Patent number: 11259778
    Abstract: A catheter system includes a catheter. The catheter includes a catheter tip and an ultrasound assembly at least partially positioned within the catheter tip. The ultrasound assembly includes a first optical fiber coupled to an optical-to-ultrasound transducer and a second optical fiber coupled to an ultrasound-to-optical transducer. The optical-to-ultrasound transducer is configured to generate an ultrasound signal in response to a pulsed optical signal. The ultrasound-to-optical transducer is configured to generate an optical signal in response to a received ultrasound signal.
    Type: Grant
    Filed: March 21, 2018
    Date of Patent: March 1, 2022
    Assignee: Boston Scientific Scimed Inc.
    Inventors: Aiden Flanagan, Daniel J. Foster
  • Patent number: 11252141
    Abstract: A system comprises a teleoperated manipulator, a manually operated surgical instrument coupled to the teleoperated manipulator, a teleoperated surgical instrument coupled to the teleoperated manipulator, and a shape sensor comprising a first portion and a second portion. The first portion of the shape sensor is coupled to a proximal end of a cannula, and the second portion of the shape sensor is coupled to the manually operated surgical instrument. The shape sensor is configured to provide a sensor input to a controller, and the sensor input comprises information representing an insertion depth of the manually operated surgical instrument into the cannula.
    Type: Grant
    Filed: February 11, 2020
    Date of Patent: February 15, 2022
    Assignee: INTUITIVE SURGICAL OPERATIONS, INC.
    Inventors: Giuseppe Maria Prisco, Myriam J. Curet, Vincent Duindam, Catherine J. Mohr, Theodore W. Rogers, Katherine D. Stoy
  • Patent number: 11248591
    Abstract: A textile contractible band for use in a wearable garment for applying pressure to a subject body part includes a shape memory material, in particular a shape memory alloy, or shape memory polymer, part and a textile part, said parts being successively coupled to form said contractible band, wherein the shape memory material part has an electrically-contractible shape memory material and a spring arranged to reverse the contraction of the shape memory material, and wherein the textile part has an elastic fabric band and an optical fiber strain sensor arranged to sense the fabric band strain. The sensor can be a lossy optical fiber arranged in meandering layout such that variation of band extension causes variation of transmitted light. The contractual band can be used for lymphedema or venous return.
    Type: Grant
    Filed: June 11, 2018
    Date of Patent: February 15, 2022
    Assignees: IPCA—INSTITUTO POLITÉCNICO DO CÁVADO E AVE, CENTITVC—CENTRO DE NANOTECNOLOGIA E MATERIAIS TÉCNICOS, FUNCIONAIS E INTELIGENTES
    Inventors: Carlos Diogo Alves Da Costa Gonçalves, Ricardo João Ferreira Simões, Alexandre Manuel Teixeira De Barros Ferreira Da Silva, João Manuel De Carvalho Gomes
  • Patent number: 11243298
    Abstract: A light detection and ranging system includes a first optical source and a second optical source configured to emit respectively a first optical beam and a second optical beam that have opposite polarizations. The system also includes a first tap and a second tap configured to split respectively the first optical beam and the second optical beam into a first high-power path optical beam and a first low-power path optical beam, and a second high-power path optical beam and a second low-power path optical beam. The system also includes a first polarization beam splitter configured to combine the first high-power path optical beam and the second high-power path optical beam into a single spatial mode optical beam.
    Type: Grant
    Filed: May 28, 2021
    Date of Patent: February 8, 2022
    Assignee: Aeva, Inc.
    Inventor: Mina Rezk
  • Patent number: 11233577
    Abstract: Examples include systems and methods for communicating temperature variation information of a transmitter resonator to a receiver resonator in an optical communication system. Some examples provide a transceiver module that includes a transmitter resonator to transmit optical signals emitted from a light source, a photodetector coupled to the transmitter resonator to detect the optical signals transmitted by the transmitter resonator and generate a photocurrent, and a controller to receive the photocurrent from the photodetector, determine temperature variation information of the transmitter resonator from the photocurrent, and encode the temperature variation information in an outgoing data stream transmitted via the transmitter resonator.
    Type: Grant
    Filed: September 3, 2020
    Date of Patent: January 25, 2022
    Assignee: Hewlett Packard Enterprise Development LP
    Inventor: Mir Ashkan Seyedi
  • Patent number: 11217775
    Abstract: An optical waveguide and manufacturing method thereof, display substrate and display device. The optical waveguide comprises an optical fiber array arranged on a surface where each optical fiber in the optical fiber array has a cylindrical shape and the axis of each optical fiber is perpendicular to the surface. With the effect of limitation and mixing of the optical fibers, the intensity and color of the light from the optical waveguide are basically homogeneous in the whole emitting range, such that the viewing angle characteristics of the display device are effectively improved and the problem of uneven brightness and color bias in the range of viewing angle is solved.
    Type: Grant
    Filed: December 18, 2019
    Date of Patent: January 4, 2022
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Zhijie Ye, Rui Peng, Xinxin Wang, Lei Huang, Wenbin Jia
  • Patent number: 11208884
    Abstract: Disclosed are tools, systems, and methods for detecting one or more underground acoustic sources and localizing them in depth and radial distance from a wellbore, for example, for the purpose of finding underground fluid flows, such as may result from leaks in the well barriers. In various embodiments, acoustic-source detection and localization are accomplished with an array of at least three acoustic sensors disposed in the wellbore, in conjunction with array signal processing.
    Type: Grant
    Filed: January 11, 2016
    Date of Patent: December 28, 2021
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Yinghui Lu, Avinash Vinayak Taware, Paris Smaragdis, Nam Nguyen, David Alan Welsh, Clifford Lloyd Macklin, Daniel Viassolo
  • Patent number: 11211810
    Abstract: A heating circuit for an energy storage device having a core with an electrolyte, the energy storage device having inputs, characteristics of a capacitance across the electrolyte and the core, and internal surface capacitance between the inputs which can store electric field energy between internal electrodes of the energy storage device that are coupled to the inputs, the battery heating circuit including: a controller configured to switch between a positive input voltage and a negative input voltage provided to one of the inputs at a frequency sufficient to effectively short the internal surface capacitance of the energy storage device to generate heat and raise a temperature of the electrolyte, the controller being further configured to discontinue the switching when the temperature of the electrolyte and/or the energy storage device is above a predetermined temperature that is considered sufficient to increase a charging efficiency of the energy storage device.
    Type: Grant
    Filed: September 30, 2019
    Date of Patent: December 28, 2021
    Assignee: OMNITEK PARTNERS LLC
    Inventors: Jahangir S Rastegar, Philip C Kwok
  • Patent number: 11207086
    Abstract: A device for delivery of material or stimulus to targets within a body to produce a desired response, the targets being at least one of cells of interest, cell organelles of interest and cell nuclei of interest. The device includes a number of projections for penetrating a body surface, with the number of projections being selected to produce a desired response, and the number being at least 500. A spacing between projections is also at least partially determined based on an arrangement of the targets within the body.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: December 28, 2021
    Assignee: VAXXAS PTY LIMITED
    Inventor: Mark Anthony Fernance Kendall
  • Patent number: 11209401
    Abstract: Systems and methods for detecting corrosion in pipes are disclosed herein. In one embodiment, an apparatus for detecting corrosion in an object includes an electromagnetic acoustic transducer (EMAT) having a ferromagnetic core and a plurality of permanent magnets arranged peripherally around the ferromagnetic core. The permanent magnets are arranged to produce a magnetic field through the ferromagnetic core. The apparatus also includes a coil between the ferromagnetic core and the object.
    Type: Grant
    Filed: March 2, 2018
    Date of Patent: December 28, 2021
    Assignee: QUEST INTEGRATED, LLC
    Inventors: Phillip D. Bondurant, Anthony Mactutis, Richard Lyle Dougherty
  • Patent number: 11209361
    Abstract: An optical density measuring apparatus and an optical waveguide capable of increasing the degree of design freedom are provided. The optical density measuring apparatus is for measuring density of a gas or a liquid to be measured and includes a light source capable of irradiating light into a core layer, a detector capable of receiving light propagated through the core layer, and an optical waveguide. The optical waveguide includes a substrate and the core layer, which includes a diffraction grating unit and a light propagation unit capable of propagating light in an extending direction of the light propagation unit. The diffraction grating unit and a portion of the core layer are separated in the thickness direction of the optical waveguide.
    Type: Grant
    Filed: March 19, 2020
    Date of Patent: December 28, 2021
    Assignee: Asahi Kasei Microdevices Corporation
    Inventors: Toshiro Sakamoto, Tatsushi Yagi
  • Patent number: 11204513
    Abstract: The present invention relates to an integrated frequency referencing system. The integrated frequency referencing control system comprises inter alia a substrate and an optical pathway being integrated on the substrate and being configured and operable to enable propagation for light signals. The optical pathway comprises an electro-optic modulator structure being configured and operable to impart a unique identification modulation to at least one input optical signal emitted by the light source, at least one optical dielectric waveguide being configured and operable to enable confinement and propagation of the at least one input modulated optical signal therethrough, and an atomic vapor cell accommodating atoms or molecules providing at least one atomic or molecular transition.
    Type: Grant
    Filed: May 4, 2020
    Date of Patent: December 21, 2021
    Assignee: YISSUM RESEARCH DEVELOPMENT COMPANY OF THE HEBREW UNIVERSITY OF JERUSAMEM LTD
    Inventor: Uriel Levy
  • Patent number: 11193818
    Abstract: A frequency modulation demodulator based on fiber grating sensor array comprises: a laser, radio frequency signal source, acousto-optic modulator, delay fiber pair, Mach-Zehnder modulator, optical filter, optical amplifier, optical isolator, circulator, fiber grating sensor array, photodetector and data acquisition card. By the cooperation of delay fiber pair and the fiber grating, the reflected optical pulses of the two gratings (the front grating and the back grating) are overlapped in the time domain to form interference, and thereby achieving multi-point array interference demodulation.
    Type: Grant
    Filed: August 1, 2020
    Date of Patent: December 7, 2021
    Assignee: ZHEJIANG UNIVERSITY
    Inventors: Xiaofeng Jin, Zhiwei Cheng, Jianhai Ou, Xiangdong Jin, Yijie Du, Yinfang Xie
  • Patent number: 11175420
    Abstract: A data telemetry system and method digitizes acoustic sensor data. Acoustic sensor data is digitized and used to apply strain to a series of Fiber Bragg Gratings (FBGs) in a fiber. Each FBG is assigned a nominal wavelength. A wavelength interrogator launches wavelengths into the fiber and scans the reflected wavelengths from the FBGs. A data telemetry rate of at least 5 kHz may be achieved. Acoustic sensors may be part of undersea acoustic sensing arrays with large element counts having reduced system cabling and improved Size, Weight and Power (SWaP). The system and method realizes low power loss per array element and efficient multiplexing of many data streams in a small form factor.
    Type: Grant
    Filed: November 13, 2018
    Date of Patent: November 16, 2021
    Assignee: Northrop Grumman Systems Corporation
    Inventors: Peter F Hallemeier, Alan M Heins
  • Patent number: 11172827
    Abstract: An apparatus can be provided according to certain exemplary embodiments. For example, the apparatus can include a waveguiding first arrangement providing at least one electromagnetic radiation. A configuration can be provided that receives and splits the at least one electromagnetic radiation into a first radiation and a second radiation. The apparatus can further include a waveguiding second arrangement which has a first waveguide and a second waveguide, whereas the first waveguide receives the first radiation, and the second waveguide receives the second radiation. The first arrangement, the second arrangement and the configuration can be housed in a probe.
    Type: Grant
    Filed: April 3, 2018
    Date of Patent: November 16, 2021
    Assignee: The General Hospital Corporation
    Inventors: Ali Motafakker-Fard, Paulino Vacas Jacques, Guillermo Tearney, Mireille Rosenberg
  • Patent number: 11169019
    Abstract: One example coherent optical time domain reflectometer device includes a coherent light source that produces coherent probe light pulses at an optical wavelength; an optical coupling unit coupled to f a fiber link under test to direct the coherent probe light pulses into the fiber link and to receive reflected probe light pulses from the fiber link; an optical detection unit to receive the reflected probe light pulses and structured to include an optical interferometer to process the reflected probe light pulses along two different optical paths to generate different optical output signals from the reflected probe light pulses along different optical paths, and optical detectors to receive the optical output signals from the optical interferometer; and a device controller coupled to the optical detection unit to extract information on spatial distribution of acoustic—or vibration—or strain-dependent characteristics as a function of distance along the fiber link under test.
    Type: Grant
    Filed: February 10, 2017
    Date of Patent: November 9, 2021
    Assignee: Luna Innovations Incorporated
    Inventors: Hongxin Chen, Xiaotian Steve Yao
  • Patent number: 11169025
    Abstract: The present invention provides a method for measuring an optical sensor system comprising an array of intrinsic fiber optic sensors at an interrogator comprising an optical source and an optical detector. The method comprises the steps of emitting an optical signal to an array of intrinsic fiber optic sensors; detecting optical responses to the emitted signal from the sensors; associating each detected optical response with an individual sensor by determining within which region among a plurality of detection regions assigned to the individual sensors the optical response is detected wherein each detection region corresponds to a wavelength range in the bandwidth of the optical sensor system; and performing signal processing on each optical response to measure the value of the physical parameter detected by its associated sensor. A calibration of the detection region assigned to each sensor is performed at predetermined intervals.
    Type: Grant
    Filed: January 23, 2018
    Date of Patent: November 9, 2021
    Assignee: OPTICS11 FAZ LIMITED
    Inventors: John O'Dowd, Devrez Mehmet Karabacak, Roger Maher, Vivian Bessler, Lymperis Voudouris
  • Patent number: 11150082
    Abstract: A shape sensor employs light guide technology to determine curvature of a flexible substrate to which the shape sensor is applied. The shape sensor includes a flexible two-dimensional lattice of first light guides that extend in a first direction and second light guides that extend in a second direction that intersects with the first direction. The light guides include a core having a refractive index that is greater than a refractive index of a cladding material in which the light guides are embedded, and intersect at intersecting core regions at which crosstalk of light travel occurs between the first light guides and the second light guides. A controller transmits excitation control signals to light sources of the light guides and reads output signals from photodetectors. The controller further determines a curvature of the shape sensor based on the output signals read from the photodetectors.
    Type: Grant
    Filed: June 18, 2019
    Date of Patent: October 19, 2021
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Diego Gallardo
  • Patent number: 11143678
    Abstract: In order to carry out the polarimetric detection of a measurand, light of two polarization states is passed through a sensing element, where the two states suffer a differential phase shift depending on the value of the measurand. In order to compensate for only imperfections of the device, a method is proposed that is based on calibration values obtained in a low-value regime of the measurand only. Yet the method can still be used for accurately determining higher values of the measurand.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: October 12, 2021
    Assignee: ABB POWER GRIDS SWITZERLAND AG
    Inventors: Klaus Bohnert, Andreas Frank, Georg Muller, Lin Yang
  • Patent number: 11125966
    Abstract: A lens alignment system and method is disclosed. The disclosed system/method integrates one or more lens retaining members/tubes (LRM/LRT) and focal length spacers (FLS) each comprising a metallic material product (MMP) specifically manufactured to have a thermal expansion coefficient (TEC) in a predetermined range via selection of the individual MMP materials and an associated MMP manufacturing process providing for controlled TEC. This controlled LRM/LRT TEC enables a plurality of optical lenses (POL) fixed along a common optical axis (COA) by the LRM/LRT to maintain precise interspatial alignment characteristics that ensure consistent and/or controlled series focal length (SFL) within the POL to generate a thermally neutral optical system (TNOS). Integration of the POL using this LRM/LRT/FLS lens alignment system reduces the overall TNOS implementation cost, reduces the overall TNOS mass, reduces TNOS parts component count, and increases the reliability of the overall optical system.
    Type: Grant
    Filed: April 26, 2018
    Date of Patent: September 21, 2021
    Inventors: James Alan Monroe, David Scott Content, Jeremy Sean McAllister, Jay Russell Zgarba
  • Patent number: 11125945
    Abstract: An optical fiber sensor extends coaxially with a controllable heater to provide high-resolution axial measurement of thermal properties such as thermal convection of the surrounding, Heat removal by either conduction or convection may be used to deduce material height in a tank, or velocity of flow when coupled with localized heating, or other aspects of the material based on thermal conductivity.
    Type: Grant
    Filed: August 8, 2017
    Date of Patent: September 21, 2021
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Mark Harlan Anderson, Matthew Thomas Weathered
  • Patent number: 11125633
    Abstract: Strain sensing compositions including a polymeric matrix material and a mechanophore component distributed throughout the polymeric material and covalently bonded to the polymeric material are provided. The mechanophore component undergoes a visible color change and the strain sensing composition exhibits a continuous three-dimensional (3D) spatial strain distribution including at least one color gradient upon direct or indirect impact by an object. Methods of forming strain sensing compositions are also provided. Methods of evaluating a strain distribution associated with an impact of a surrogate material comprising a mechanophore component are also provided.
    Type: Grant
    Filed: August 6, 2019
    Date of Patent: September 21, 2021
    Assignee: The Johns Hopkins University
    Inventors: Zhiyong Xia, Vanessa D. Alphonse, Evan P. Lloyd
  • Patent number: 11125753
    Abstract: A system detects an analyte suspected of being present in a sample. The reader reads an optical tag on a substrate, which is configured to immobilize the tag on a substrate surface. The optical tag is bound to a probe and includes a plurality of pores that create an effective index of refraction. The plurality of pores and a thickness of the tag are selected for a reflectance property. The substrate is configured to contact a sample suspected of comprising an analyte. The probe is capable of binding specifically to the analyte. The reader is configured to expose the tag to light to generate a sample spectral signature that is a function of the effective index of refraction, the thickness of the optical tag, and whether the analyte is coupled to the probe. The sample spectral signature is compared to a reference to detect the analyte in the sample.
    Type: Grant
    Filed: March 23, 2018
    Date of Patent: September 21, 2021
    Assignee: TruTag Technologies, Inc.
    Inventors: Hod Finkelstein, Timothy Learmonth
  • Patent number: 11126065
    Abstract: Systems, methods, and apparatus for photonic crystals logic devices are disclosed. In one or more embodiments, a disclosed method for an optical logic device comprises radiating, by at least one source, at least one signal. The method further comprises reflecting at least one signal off of at least one photonic crystal, when at least one photonic crystal senses a physical phenomena of a threshold strength. Also, the method comprises not reflecting at least one signal off of at least one photonic crystal, when at least one photonic crystal does not sense the physical phenomena of the threshold strength. Further, the method comprises detecting or not detecting, by at least one detector, at least one signal.
    Type: Grant
    Filed: June 9, 2016
    Date of Patent: September 21, 2021
    Assignee: The Boeing Company
    Inventors: Michael A. Carralero, Ty A. Larsen, Joseph M. Tostenrude
  • Patent number: 11098538
    Abstract: A carrier system may be used to position a wireline tool within a wellbore. The system includes a wireline tool carrier disposed on the end of a coiled tubing string. The wireline carrier tool includes a tubular member and stabilizers which secure the wireline tool within an internal passageway of the tubular member. The internal passageway defines a fluid flow path which facilitates fluid communication between the coiled tubing string and any device or wellbore portion below the wireline tool carrier. As the system is advanced within the wellbore fluid is conveyed around the wireline tool through the fluid flow path to remove obstructions that would otherwise inhibit the placement of the wireline tool within a deviated wellbore. Fluid conveyed through the system and around the wireline tool may also be used to perform various well stimulation and intervention functions.
    Type: Grant
    Filed: July 15, 2016
    Date of Patent: August 24, 2021
    Assignee: HALLIBURTON ENERGY SERVICES, INC.
    Inventors: John Leslie Wisinger, Jr., Jonathan Peter Zacharko
  • Patent number: 11099005
    Abstract: A fiber-optic sensors for measuring deformation, intended to operate in a harsh environment is provided. The sensor comprises a Fabry-Perot-cavity-based optical measurement head, a linking optical fiber and an expansion reserve case, the case comprising a segment of the linking optical fiber. The inside thickness of the case is comprised between one and several millimeters, the case being flat and of shape referred to as bicorne shape, the shape comprising a convex central portion and two concave symmetric ends, the optical fiber forming, inside the bicorne, one and only one arch, the segment of the optical fiber being, in addition, tangent to the internal surfaces of the reserve case, whatever the temperature conditions.
    Type: Grant
    Filed: April 10, 2019
    Date of Patent: August 24, 2021
    Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
    Inventors: Guy Cheymol, Laurent Remy
  • Patent number: 11095030
    Abstract: A receiver (1) for a phased array antenna comprises a laser light source (2) arranged to provide an optical spectrum comprising a first spectral component having a first wavelength and a second spectral component having a second wavelength. The first wavelength is spaced from the second wavelength. A wavelength separator (4) is configured to separate the first spectral component from the second spectral component, such that the first spectral component is directed onto a first path (A) and the second spectral component is directed onto a second path (B). A first delay unit (16) is configured to add a controllable time delay to the first spectral component on the first path. A second delay unit (42) is configured to add the time delay to the second spectral component on the second path. A modulator (14) is configured to modulate the first spectral component on the first path with a received RF signal from the phased array antenna.
    Type: Grant
    Filed: March 12, 2015
    Date of Patent: August 17, 2021
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Marzio Puleri, Antonella Bogoni, Antonio D'Errico, Paolo Ghelfi
  • Patent number: 11085877
    Abstract: Methods and apparatus are provided for determining the refractive index of a downhole fluid. Two unalike crystals are provided having faces in contact with fluid in the fluid flow line of a borehole tool. The crystals are chosen to have different refractive indices and/or different angles of incidence, but to provide total internal reflection for light that is directed through the crystals to the crystal/fluid interface. The measured attenuations for each crystal are used in conjunction with the known refractive indices and angles of incidence of said crystals to determine the refractive index of the fluid.
    Type: Grant
    Filed: September 8, 2017
    Date of Patent: August 10, 2021
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Richa Sharma, Raji Shankar, Terizhandur S. Ramakrishnan
  • Patent number: 11079368
    Abstract: The invention is directed towards a method and system for optically-based monitoring of chemicals of potential concern (COPCs), including mercury (Hg), methyl mercury (MeHg), and polychlorinated biphenyls (PCBs). It employs a multi-parameter statistical analysis model, such as partial least square regression (PLS regression), to identify combinations of predictors (e.g., optical, water quality, and physical properties) that have large covariance with the response values. The predictive model is validated against analytic samples from laboratories. The steps in the method are repeated until predictors, or parameters are selected that avoid over-fitting and which yield physically-based results.
    Type: Grant
    Filed: June 26, 2017
    Date of Patent: August 3, 2021
    Assignee: Integral Consulting Inc.
    Inventors: Grace Chang Spada, Craig A. Jones, Todd Martin
  • Patent number: 11073378
    Abstract: A clearance measurement device is a device for measuring a clearance between an inner peripheral surface of a casing and an outer peripheral surface of a rotary body. This device: emits light having a first wavelength and a second wavelength, respectively, towards the outer peripheral surface of the rotary body; receives the light reflected from the outer peripheral surface via a first filter having a transmission band corresponding to the first wavelength and via a second filter having a transmission band corresponding to the second wavelength; and measures the clearance based on a time difference of the moment to detect the rotary body.
    Type: Grant
    Filed: April 24, 2018
    Date of Patent: July 27, 2021
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Misaki Fukuyama, Akio Kondou, Tomoyuki Onishi, Takahiro Miyamoto
  • Patent number: 11061184
    Abstract: A high backscattering optical fiber comprising a perturbed segment in which the perturbed segment reflects a relative power such that the optical fiber has an effective index of neff, a numerical aperture of NA, a scatter of Rp?r(fiber), a total transmission loss of ?fiber, an in-band range greater than one nanometer (1 nm), a center wavelength (?0) of the in-band range (wherein 950 nm<?0<1700 nm), and a figure of merit (FOM) in the in-band range. The FOM>1, with the FOM being defined as: FOM = R p ? r ( fiber ) ? fiber ? ( NA 2 ? n eff ) 2 .
    Type: Grant
    Filed: August 18, 2020
    Date of Patent: July 13, 2021
    Assignee: OFS FITEL, LLC
    Inventors: Tristan Kremp, Paul S. Westbrook, Tommy Geisler
  • Patent number: 11022467
    Abstract: An improved optical fiber distributed acoustic sensor system uses an optical fiber having reflector portions distributed along its length in at least a first portion. The reflector portions are positioned along the fiber separated by a distance that is equivalent to twice the distance an optical pulse travels along the fiber in a single sampling period of the data acquisition opto-electronics within the sensor system. No oversampling of the reflections of the optical pulses from the reflector portions is undertaken. The sampling points for data acquisition in the sensor system are aligned with the reflections that arrive at the sensor system from along the sensing fiber. Adaptive delay componentry adaptively aligns the reflected optical signals (or their electrical analogues) with the sampling points. Control over the sampling points can re-synchronise the sampling points with the returning reflections. Reflection equalisation componentry may reduce the dynamic range of the returning reflections.
    Type: Grant
    Filed: January 5, 2018
    Date of Patent: June 1, 2021
    Assignees: Silixa Ltd., Chevron U.S.A. Inc.
    Inventors: Sergey Shatalin, Julian Dajczgewand, Mahmoud Farhadiroushan, Tom Parker
  • Patent number: 11009658
    Abstract: Light detectors that combine field emission with light focusing by surface plasmon polaritons. Methods and devices that allow detection and measurement of light at high frequencies in the THz range are described. The disclosed devices include plasmonic metal contacts with a narrow nanometer-sized gap to couple an optical waveguide mode into a plasmonic mode thereby generating filed emission currents by biasing the contacts.
    Type: Grant
    Filed: February 27, 2020
    Date of Patent: May 18, 2021
    Assignee: CALIFORNIA INSTITUTE OF TECHNOLOGY
    Inventors: William M. Jones, Lucia B. De Rose, Axel Scherer
  • Patent number: 10987037
    Abstract: The invention relates generally to in vivo collection of circulating molecules, tumor cells and other biological markers using a collecting probe. The probe is configured for placement within a living organism for an extended period of time to provide sufficient yield of biological marker for analysis.
    Type: Grant
    Filed: September 23, 2015
    Date of Patent: April 27, 2021
    Assignee: JOHN WAYNE CANCER INSTITUTE
    Inventors: David Hoon, Bret Taback, Samuel Shaolian
  • Patent number: 10989663
    Abstract: A device for optically exciting fluorescence is disclosed. The device comprises transparent substrate having first and second opposite faces and a multilayer stack disposed on the second face of the substrate. The multilayer stack comprises a first layer having first and second opposite faces and a first refractive index and a second layer having first and second opposite faces and a second refractive index. The first face of the first layer is disposed on the second face of the substrate. The first face of the second layer is disposed on the second face of the first layer such that the first layer is interposed between the second layer and the substrate. The substrate has a third refractive index. The first refractive index is less than the second refractive index and the third refractive index. The device comprises a light source carried by the first face of the substrate and arranged to emit light towards the first face of the first layer.
    Type: Grant
    Filed: May 17, 2017
    Date of Patent: April 27, 2021
    Assignees: Cambridge Display Technology Limited, Sumitomo Chemical Company Limited
    Inventors: Matthew Roberts, May Wheeler
  • Patent number: 10989865
    Abstract: The present disclosure relates to a stretchable fiber optic sensor that can measure tension, bending, and torsion direction of an object. The fiber optic sensor includes an optical fiber with a fiber Bragg grating (FBG) embedded in a sinusoidal configuration at an off-center position of a deformable substrate.
    Type: Grant
    Filed: February 4, 2019
    Date of Patent: April 27, 2021
    Assignee: UNIVERSITY OF GEORGIA RESEARCH FOUNDATION, INC
    Inventors: Mable P. Fok, Xiangiao Wang, Li Xu