公开(公告)号：US09797825B2

公开(公告)日：2017-10-24

申请号：US14434650

申请日：2013-06-12

Applicant: Halliburton Energy Services, Inc.

Inventor： Neal Gregory Skinner ,  David L. Perkins

IPC: G01J4/00 ,  G01N21/23 ,  G01N21/31 ,  G01B11/06 ,  G02B5/30

CPC classification number: G01N21/23 ,  G01B11/0625 ,  G01N21/314 ,  G01N2201/0683 ,  G02B5/3083

Abstract: Disclosed are optical computing devices that employ birefringent optical elements configured for use in optical computing devices. One optical computing device includes a polarizer configured to generate at least x polarized light and y polarized light, a birefringent integrated computational element configured to optically interact with a substance and the polarizer, thereby generating optically interacted light, and at least one detector arranged to receive the optically interacted light and generate an output signal corresponding to a characteristic of the substance.

公开(公告)号：US09791315B2

公开(公告)日：2017-10-17

申请号：US14761328

申请日：2014-01-16

Applicant: UNIVERSITEIT LEIDEN

Inventor： Christoph Ulrich Keller ,  Frans Snik

IPC: G01J3/02 ,  G01J4/04 ,  G02F1/01 ,  G01J1/42 ,  G01J1/04 ,  G01J3/14 ,  G01J4/00

CPC classification number: G01J3/0224 ,  G01J1/0425 ,  G01J1/4228 ,  G01J3/0218 ,  G01J3/14 ,  G01J4/00 ,  G01J4/04 ,  G02F1/0136

Abstract: A polarimetry apparatus comprising a plurality of flexible light conduits each having first and second ends, and a respective polarization modulator associated with each light conduit, wherein each light conduit is configured to receive incident light from a different predetermined region in space via the first end, and deliver said light to a detector unit via the second end, and wherein the polarization modulator is configured to modulate the polarization of the light to enable a partial or complete polarization state of the incident light to be determined by the detector unit for each light conduit.

公开(公告)号：US09733133B2

公开(公告)日：2017-08-15

申请号：US14509015

申请日：2014-10-07

Applicant: Xiaotian Steve Yao

Inventor： Xiaotian Steve Yao

IPC: G01J4/00 ,  G01K11/32 ,  G01R15/24 ,  G01K11/00

CPC classification number: G01K11/32 ,  G01K11/00 ,  G01R15/246

Abstract: This patent application discloses techniques and devices for sensing or measuring electric currents and/or temperature based on photonic sensing techniques. An optical current sensor head is located near or at a current-carrying conductor so that a magnetic field associated with the current is present at a Faraday material and the optical detection unit detects the light from the Faraday material to determine a magnitude of the current. An optical temperature sensor head is located near or at a location so that the temperature at a temperature-sensing Faraday material is reflected by the optical polarization rotation which is detected to determine the temperature.

公开(公告)号：US09726703B2

公开(公告)日：2017-08-08

申请号：US14365395

申请日：2012-12-04

Applicant: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS)

Inventor： Wojciech Knap ,  Frédéric Teppe ,  Nina Diakonova ,  Michel Diakonov ,  Oleg Klimenko ,  Sergey Ganichev ,  Christop Drexler

IPC: G01J3/42 ,  G01R29/08 ,  G01J4/00

CPC classification number: G01R29/0878 ,  G01J3/42 ,  G01J4/00

Abstract: The invention relates to a device (1) for measuring the state of polarization of an incident wave of frequency 10 GHz to 30 THz, comprising a field effect transistor (2), a reception antenna (3). According to the invention, the antenna parts (31, 33) detect a component of polarization of the wave, collinear with a direction (X) causing in the transistor (2) an alternating detection voltage (Us), the parts (32, 33) detect a component of polarization of the wave, collinear with a direction (Y) causing the appearance in the transistor (2) of an alternating detection voltage (Ud), the transistor (2) being designed to generate, as electrical detection signal (ΔU) between the source terminal (21) and the drain terminal (22), a DC detection voltage (ΔU) a part of which is determined by the state of elliptical polarization of the wave by interference in the transistor (2) between the alternating voltages (Us, Ud).

公开(公告)号：US09720218B2

公开(公告)日：2017-08-01

申请号：US14452181

申请日：2014-08-05

Applicant: Howard Hughes Medical Institute

Inventor： Meng Cui ,  Lingjie Kong

IPC: G01J4/00 ,  G02B21/00 ,  G02B21/36

CPC classification number: G02B21/0076 ,  G02B21/002 ,  G02B21/0092 ,  G02B21/367

Abstract: A system for a laser-scanning microscope includes an optical element configured to transmit light in a first direction onto a first beam path and to reflect light in a second direction to a second beam path that is different from the first beam path; a reflector on the first beam path; and a lens including a variable focal length, the lens positioned on the first beam path. The lens and reflector are positioned relative to each other to cause light transmitted by the optical element to pass through the lens a plurality of times and in a different direction each time. In some implementations, the system also can include a feedback system that receives a signal that represents an amount of focusing of the lens, and changes the focal length of the lens based on the received signal.

公开(公告)号：US20170211981A1

公开(公告)日：2017-07-27

申请号：US15409837

申请日：2017-01-19

Applicant: Tsinghua University ,  HON HAI PRECISION INDUSTRY CO., LTD.

Inventor： LING ZHANG ,  YANG WU ,  KAI-LI JIANG ,  CHANG-HONG LIU ,  JIA-PING WANG ,  SHOU-SHAN FAN

IPC: G01J4/00 ,  G01J3/50

CPC classification number: G01J9/00 ,  G01J1/0429 ,  G01J1/42 ,  G01J3/50 ,  G01J4/00 ,  G01J5/023 ,  G01J2003/507

Abstract: An optical wavelength detecting device, the device including: a polarizer configured to transform an incident light into a polarized light; a detecting element configured to receive the polarized light and form a temperature difference or a potential difference between two points of the detecting element, wherein the detecting element includes a carbon nanotube structure including a plurality of carbon nanotubes oriented along the same direction, and angles between a polarizing direction of the polarized light and an oriented direction of the plurality of carbon nanotubes is adjustable; a measuring device electrically connected to the detecting element and configured to measure the temperature difference or the potential difference; a data processor electrically connected to the measuring device and configured to obtain the optical wavelength by calculating and analyzing the temperature difference or the potential difference.

公开(公告)号：US09710718B2

公开(公告)日：2017-07-18

申请号：US14930232

申请日：2015-11-02

Applicant: BEIJING KUANGSHI TECHNOLOGY CO., LTD. ,  PINHOLE (BEIJING) TECHNOLOGY CO., LTD.

Inventor： Shuchang Zhou ,  Chi Zhang

IPC: G06K9/00 ,  G06K9/20 ,  G01J4/00 ,  G06K9/46

CPC classification number: G06K9/00906 ,  G01J4/00 ,  G06K9/0012 ,  G06K9/00255 ,  G06K9/00288 ,  G06K9/2036 ,  G06K9/4661

Abstract: Provided are a liveness authentication method and apparatus, which perform liveness authentication by determining whether incident light is linear polarized light. The liveness authentication method comprises: making incident light incident to a set of polarizing filters not overlapped with each other in a light transmission direction; detecting, for each of the set of polarizing filters, an intensity of light transmitting through the polarizing filter, so as to obtain a set of light intensities corresponding to respective polarizing filters of the set of polarizing filters respectively; and determining that the liveness authentication is failed in the case that the set of light intensities satisfy a predetermined condition. In the case that the incident light is light emitted from a liquid crystal display screen, the incident light is the linear polarized light, and thus the liveness authentication is failed.

公开(公告)号：US09678009B2

公开(公告)日：2017-06-13

申请号：US14877944

申请日：2015-10-08

Applicant: NATIONAL CHENG KUNG UNIVERSITY

Inventor： Chun-Hung Lin ,  Wen-Yu Chen

IPC: G01J4/00 ,  G01N21/552

CPC classification number: G01N21/553 ,  G01N21/554

Abstract: A method for a localized surface plasmon resonance (LSPR) sensing system is disclosed. The LSPR sensing system has an optical detection system and a test specimen with metal nanoparticles arranged in an anisotropic periodic manner that generates a phase signal of the LSPR sensing system. The method includes: emitting an incident light toward the test specimen to excite the metal nanoparticles, thereby generating an emergent light; using the optical detection system to detect phases of a first polarization state and a second polarization state of the emergent light, where the first polarization state is perpendicular to the second polarization state; and obtaining a phase difference spectrum between the phases of the first and second polarization states, thereby determining a half maximum (FWHM) of the phase difference spectrum.

公开(公告)号：US09677995B2

公开(公告)日：2017-06-13

申请号：US14595266

申请日：2015-01-13

Applicant: Rudolph Research Analytical Corporation

Inventor： Richard C. Spanier ,  Jeff Wagner

IPC: G01N21/00 ,  G01N21/11 ,  G01J4/00 ,  G01N21/21

CPC classification number: G01N21/11 ,  G01J4/00 ,  G01N21/21

Abstract: A sample cell filling device for filling a sample cell to be used remotely from a polarimeter is provided. The filling device includes a liquid-sealed housing, light source and a diffuser viewing screen. The housing has a recess for receiving the sample cell, the sample cell having first and second optical windows at the respective ends. A light source transmits light from one optical window to the other optical window. A diffuser viewing screen receives light exiting from the sample cell such that light from the viewing screen can be observed by a user to determine the quality of the sample fill.

公开(公告)号：US09677943B2

公开(公告)日：2017-06-13

申请号：US15215323

申请日：2016-07-20

Applicant: Oki Electric Industry Co., Ltd.

Inventor： Yoshihiro Kanda

IPC: G01J4/00

CPC classification number: G01J4/00 ,  G01J2004/008 ,  G01M11/338

Abstract: A PV vector measuring apparatus includes: a light source 101configured to output probe light; a polarization switch 102 that can freely set a state of polarization of input light; a polarimeter 104; a PV-vector calculating device 105; and a rectangular wave generator 106. The polarization switch alternately switches between two orthogonal states of polarization in accordance with a rectangular wave modulation signal output from the rectangular wave generator. Output light from the polarization switch is input to a measurement object 103. The polarimeter 104 measures time dependency of an SOP vector of output light output from the measurement object. The PV-vector calculating device calculates a characteristic vector, which expresses a rate of polarization change in the measurement object, from the time dependency of the SOP vector.