公开(公告)号：EP2041537A2

公开(公告)日：2009-04-01

申请号：EP07799089.3

申请日：2007-06-27

Applicant: President and Fellows of Harvard College

Inventor： PEER, Fischer ,  GHOSH, Ambarish

IPC: G01J4/02

CPC classification number: G01J4/02 ,  G01N21/23

Abstract: A system and method for detection and measurement of circular birefringences in materials, such as optically active (chiral) liquids and materials that exhibit the Faraday effect. The method and apparatus permit the detection of optical activities via the difference in the directions of propagation the left- and the right- circularly polarized light (components). A beam of light is directed at an interface formed by the optically active medium and another medium such that a difference in the angles of refraction and/or reflection and/or diffraction between the left- and the right-circularly polarized components of the light beam can be detected. The difference in the propagation directions between the two circularly polarized light components is measured on a position sensitive detector and/or is detected as an intensity difference. The circular birefringence in isotropic liquids is a measure of their optical purity (enantiomeric excess) and hence the invention presents a method and apparatus to measure chirality. The invention is thus related to optical rotation (polarimetric) measurements, but has the advantage that it does not depend on path-length traversed through the sample.

公开(公告)号：EP1252489A2

公开(公告)日：2002-10-30

申请号：EP01900347.4

申请日：2001-01-04

Applicant: EXFO ELECTRO-OPTICAL ENGINEERING INC.

Inventor： HE, Gang ,  GARIEPY, Daniel ,  SCHINN, Gregory, Walter

IPC: G01J3/12 ,  G01J4/02 ,  G01J3/447

CPC classification number: G01J3/12 ,  G01J3/447 ,  G01J4/02

Abstract: An optical spectrum analyzer comprises a diffraction grating (DG), a polarization decomposing unit (PDM) for decomposing the input light beam into first and second light beams having mutually-perpendicular linear states of polarization, and two output ports (FP2/1, FP2/2) each for receiving from the grating, substantially exclusively, a respective one of the polarized light beams (LT, LR) after diffraction by the diffraction grating (DG). Each of the linearly-polarized light beams is directed onto the diffraction grating with its linear state of polarization at any prescribed angle to a corresponding plane of diffraction of the diffraction grating. The arrangement is such that the state of polarization of the light beams, at any particular wavelength within an operating band of the analyzer remains substantially unchanged with respect to time. The analyzer also may have a reflector (RAM) for reflecting the light beams leaving the diffraction grating after diffraction a first time so as to return them to the diffraction grating for diffraction a second time.

公开(公告)号：EP1519170B1

公开(公告)日：2010-12-22

申请号：EP04255760.3

申请日：2004-09-22

Applicant: RAYTHEON COMPANY

Inventor： Chen, Chungte W. ,  Ansley, David A

IPC: G01J4/02

CPC classification number: G01J4/02

公开(公告)号：EP2041537A4

公开(公告)日：2010-01-27

申请号：EP07799089

申请日：2007-06-27

Applicant: HARVARD COLLEGE

Inventor： PEER FISCHER ,  GHOSH AMBARISH

IPC: G01N21/23 ,  G01J4/02

CPC classification number: G01J4/02 ,  G01N21/23

公开(公告)号：EP1519170A1

公开(公告)日：2005-03-30

申请号：EP04255760.3

申请日：2004-09-22

Applicant: Raytheon Company

Inventor： Chen, Chungte W. ,  Ansley, David A

IPC: G01J4/02

CPC classification number: G01J4/02

Abstract: An imaging polarimeter sensor (20) includes an achromatic beamsplitting polarizer (30) that receives a polychromatic image beam (22) of a scene (24) and simultaneously produces a first polarized polychromatic image beam (32) and a second polarized polychromatic image beam (34). The second polarized polychromatic image beam (34) is of a different polarization than the first polarized polychromatic image beam (32) and is angularly separated from the first polarized polychromatic image beam (32). The achromatic beamsplitting polarizer (30) preferably includes a Wollaston prism (50) through which the polychromatic image beam (22) passes, and at least one grating (54, 56) through which the polychromatic image beam (22) passes either before or after it passes through the Wollaston prism (50). An imaging detector (38) receives the first polarized polychromatic image beam (32) and the second polarized polychromatic image beam (34) and produces an output image signal (40) responsive to the first polarized polychromatic image beam (32) and the second polarized polychromatic image beam (34).

Abstract translation: 成像旋光仪传感器（20）包括接收场景（24）的多色图像束（22）的同时产生第一偏振多色图像束（32）和第二偏振多色图像束（32）的消色差分束偏振器（30） 34）。 第二偏振多色图像束（34）具有与第一偏振多色图像束（32）不同的偏振，并且与第一偏振多色图像束（32）成角度地分离。 消色差分束偏振器（30）优选地包括多色图像束（22）通过的渥拉斯顿棱镜（50），以及至少一个光栅（54,56），多色图像束（22）在其之前或之后经过 它穿过渥拉斯顿棱镜（50）。 成像检测器（38）接收第一偏振多色图像束（32）和第二偏振多色图像束（34），并产生响应于第一偏振多色图像束（32）和第二偏振 多色图像束（34）。

公开(公告)号：EP4392760A1

公开(公告)日：2024-07-03

申请号：EP22772428.3

申请日：2022-08-25

Applicant: Université de Strasbourg ,  Centre National de la Recherche Scientifique

Inventor： ZALLAT, Jihad ,  HEINRICH, Christian

IPC: G01N21/21

CPC classification number: G01N21/21 ,  G01N2201/022120130101 ,  G01J4/04 ,  G01J4/02

公开(公告)号：EP3030881A2

公开(公告)日：2016-06-15

申请号：EP13895463.1

申请日：2013-10-16

Applicant: Halliburton Energy Services, Inc.

Inventor： PRICE, James M. ,  PERKINS, David L.

IPC: G01N21/17 ,  G01J4/02 ,  G02B1/02

CPC classification number: G01V8/20 ,  E21B49/081 ,  G01J4/02 ,  G01N21/21 ,  G01N2201/0683 ,  G01N2201/12 ,  G02B1/02 ,  G02B5/3025

Abstract: An intensity-independent optical computing device and method for performing multivariate optical computing based on changes in polarization of the reflected and/or transmitted electromagnetic radiation to thereby determine sample characteristics.

Abstract translation: 一种强度无关的光学计算装置和方法，用于基于反射和/或发射的电磁辐射的极化的变化来执行多变量光学计算，从而确定样本特性。

公开(公告)号：EP2877822A1

公开(公告)日：2015-06-03

申请号：EP13756601.4

申请日：2013-07-25

Applicant: Horiba Jobin Yvon S.A.S.

Inventor： ACHER, Olivier ,  RICHARD, Simon ,  NGUYEN, Thanh-Liem

IPC: G01J4/02 ,  G01J4/04

CPC classification number: G01J4/02 ,  G01J4/04

Abstract: The invention relates to an accurate and robust wavefront-division polarimetric analysis device, allowing the quasi-instantaneous measurement of the polarisation states of a luminous object. The wavefront-division polarimetric analysis device of the invention can be used to produce a plurality of light beams, all polarised according to different polarisation states, from a single upstream light beam. The polarised light beams, which do not overlap and which carry information items that are complementary in terms of polarisation, are analysed simultaneously by a plurality of detectors that measure the luminous intensity of each beam. Processing means digitally process the luminous intensity values obtained in order to determine the polarisation state of the upstream light beam. According to the invention, the operations performed by the processing means on the luminous intensity values prevent luminous intensity variations in the divided light beams during the division of the wavefront of the upstream light beam. Therefore the wavefront-division polarimetric analysis device of the invention is robust and its accuracy is not hindered by the experimental conditions. The invention further relates to a wavefront-division polarimetric analysis method for determining the polarisation state of an upstream light beam.

公开(公告)号：US20180308217A1

公开(公告)日：2018-10-25

申请号：US15765086

申请日：2016-09-09

Applicant: SONY CORPORATION

Inventor： Teppei KURITA ,  Shun KAIZU ,  Yuhi KONDO ,  Yasutaka HIRASAWA ,  Ying LU

IPC: G06T3/40 ,  G06T7/90 ,  H04N9/083 ,  H04N9/31 ,  H04N5/30

CPC classification number: G06T3/4015 ,  B60R11/02 ,  G01J3/513 ,  G01J4/02 ,  G01J2004/005 ,  G06T3/40 ,  G06T7/90 ,  H04N5/232 ,  H04N5/30 ,  H04N9/045 ,  H04N9/04515 ,  H04N9/04551 ,  H04N9/083 ,  H04N9/3182

Abstract: The polarization imaging unit generates a polarized image including pixels for each of a plurality of polarization components. The demosaicing unit calculates a pixel signal for each polarization component by using the pixel signal of the target pixel of the polarized image and the pixel signal of the pixel for each of the identical polarization components located near the target pixel. In one example, a low frequency component is calculated for each polarization component using the pixel signal of the pixel located near the target pixel for each of the identical polarization components. In addition, component information indicating relationship between the low frequency component of the polarization component of the polarized image and the pixel signal of the target pixel is acquired. Furthermore, the pixel signal for each polarization component in the target pixel is calculated based on the low frequency component and the component information for each polarization component.

公开(公告)号：US09983064B2

公开(公告)日：2018-05-29

申请号：US14523171

申请日：2014-10-24

Applicant: CORNING INCORPORATED

Inventor： Rostislav Vatchev Roussev ,  Vitor Marino Schneider

IPC: G01N21/00 ,  G01J4/02 ,  G02B5/04 ,  G02B5/06 ,  G02B6/34 ,  G01N21/23 ,  G01J4/00 ,  G01N21/43 ,  G01N21/41

CPC classification number: G01J4/02 ,  G01J2004/005 ,  G01N21/23 ,  G01N21/43 ,  G01N2021/4126 ,  G01N2021/434 ,  G02B5/04 ,  G02B5/06 ,  G02B6/34

Abstract: Apparatus and methods for measuring mode spectra for ion-exchanged glass substrates having a steep index region are disclosed. An interfacing fluid is provided between the coupling prism and the glass substrate. The interfacing fluid thickness is selected so that the variation in modal birefringence with fluid thickness is reduced to an acceptable level. The coupling prism can include a prism coating on the coupling surface so that the substrate-prism interface includes the prism coating. The coupling prism can also include stand-off members that serve to define the thickness of the interfacing fluid.