公开(公告)号：US12038330B2

公开(公告)日：2024-07-16

申请号：US17617433

申请日：2020-06-08

Applicant: UNIVERSITE LAVAL

Inventor： Zhongjin Lin ,  Wei Shi

IPC: G01J4/04 ,  G02B27/28

CPC classification number: G01J4/04 ,  G02B27/283

Abstract: There is described a polarimeter generally having a substrate; a polarization splitter on the substrate polarization splitting an incoming light beam into light beams; an interferometry circuit on the substrate forming polarization components from the light beams, and output waveguides outputting the polarization components. The interferometer circuit having a first power splitter splitting one of the light beams into first and second phase-retardant waveguides; a second power splitter splitting another one of the light beams into third and fourth phase-retardant waveguides being asymmetric with respect to the first and second phase-retardant waveguides; a first polarization coupler coupling the first and third phase-retardant waveguides to one another; and a second first polarization coupler polarization coupling the second and fourth phase-retardant waveguides to one another, in which intensities of the polarization components and an interferometry pattern of the interferometry circuit are indicative of a state of polarization of the incoming light beam.

公开(公告)号：US20240201016A1

公开(公告)日：2024-06-20

申请号：US18537948

申请日：2023-12-13

Applicant: Commissariat à I'Énergie Atomique et aux Énergies Alternatives

Inventor： François Deneuville

IPC: G01J4/04 ,  B82Y20/00 ,  G02B3/00 ,  G02B5/30

CPC classification number: G01J4/04 ,  B82Y20/00 ,  G02B3/0056 ,  G02B5/3008 ,  G02B2207/101

Abstract: A polarizing filter intended to be arranged in front of an image sensor including a plurality of pixels, the filter including, for each pixel, a polarizing structure including a plurality of parallel metal bars, each bar being coated with an absorbing stack including: —a tungsten layer; —a silicon layer, coating the tungsten layer; and —a dielectric layer, coating the silicon layer.

公开(公告)号：US20240192420A1

公开(公告)日：2024-06-13

申请号：US18532380

申请日：2023-12-07

Applicant: University of Central Florida Research Foundation, Inc.

Inventor： Ivan Divliansky ,  Oussama Mhibik ,  Axel Schülzgen

IPC: G02B5/32 ,  G01J4/04

CPC classification number: G02B5/32 ,  G01J4/04

Abstract: An optical isolator may include one or more rotated volume Bragg gratings (r-VBGs) within a volume of a material having an input face, where each of the r-VBGs reflects along a reflection path portions of input light propagating along an incidence vector through the input face that satisfies a Bragg condition for one or more selected wavelengths and has a polarization orthogonal to a diffraction plane formed by the associated grating vector and the incidence vector, and where each of the r-VBGs transmits remaining portions of the input light as transmitted light along a transmission path. The isolator may also include one or more polarization-controlling optics located along the transmission path configured to modify a polarization of return light propagating back along the transmission path towards the one or more r-VBGs, where the one or more r-VBGs reflect portions of the return light that satisfy the Bragg condition.

公开(公告)号：US11879833B2

公开(公告)日：2024-01-23

申请号：US17439480

申请日：2019-07-17

Applicant: JASCO CORPORATION

Inventor： Yuichi Miyoshi ,  Yoshiro Kondo

IPC: G01N21/19 ,  G01J4/04 ,  G01N21/21

CPC classification number: G01N21/19 ,  G01J4/04 ,  G01N2021/216

Abstract: A circular dichroism measurement device includes: a sample part having a sample; a PEM that modulates a polarization state of an incoming light to the sample part or an outgoing light from the sample part; a photo detector that detects a change in a light intensity of the outgoing light from the sample part; an amplifier that amplifies a detection signal from the photo detector; an A/D converter that converts the detection signal amplified by the amplifier to a digital signal; and a digital processing device that executes a signal processing to the digital signal from the A/D converter to acquire a measurement value of circular dichroism of the sample. The A/D converter is configured to convert the detection signal, that is amplified in a state of containing the AC component and the DC component of the light intensity that changes with the same frequency as the modulation frequency of PEM.

公开(公告)号：US11867891B2

公开(公告)日：2024-01-09

申请号：US16748463

申请日：2020-01-21

Applicant: ADVANCED OPTICAL TECHNOLOGIES, INC.

Inventor： Brian G. Hoover ,  Jonathan H. Turner

IPC: G02B21/00 ,  G01J4/04 ,  G01N21/21 ,  G01N21/84

CPC classification number: G02B21/0092 ,  G01J4/04 ,  G01N21/21 ,  G01N2021/8477 ,  G02B21/0068

Abstract: A polarimeter and a method of analyzing and imaging microstructural material orientation of a sample are disclosed. The polarimeter, which is a partial Mueller-matrix polarimeter (pMMP), accesses multiple independent polarization channels by employing two independent polarization modulators configured to switch serially among multiple independent settings, wherein the combination of the settings of the first and second polarization modulators defines an independent polarization channel, and wherein an imaging detector produces a set of spatially registered images that are synchronized with the channels formed by the polarization modulators; and wherein a processor connected with a memory executes a classification algorithm stored in the memory that maps the set of images to one or more material orientation images by mapping the set of values for each detector pixel corresponding to the set of spatially registered images to a value of material orientation at each pixel coordinate using a machine-learning model, an electrodynamic model, or a combination thereof. The invention can thereby create material microstructural orientation images of diverse anisotropic materials, for instance polymer domains, fiber bundles or plys, and metallic crystalline grains.

公开(公告)号：US20230392984A1

公开(公告)日：2023-12-07

申请号：US18203125

申请日：2023-05-30

Applicant: IMEC VZW

Inventor： Bruno FIGEYS ,  Robert GEHLHAAR ,  Jan GENOE

IPC: G01J3/28 ,  G01J3/02 ,  G01J4/04

CPC classification number: G01J3/2823 ,  G01J3/0224 ,  G01J3/0216 ,  G01J4/04 ,  G01J3/0229 ,  G01J3/2803 ,  G01J2003/2826 ,  G01J2003/282

Abstract: According to an aspect of the present inventive concept there is provided a device for polarization dependent imaging, comprising a detector comprising an array of light sensitive elements; a plurality of light propagating units, each comprising: a funnel element having a collecting end and a transmitting end, the funnel element being configured to collect light at the collecting end and propagate the light to the transmitting end; a waveguide having a receiving end and a distributing end, the waveguide being configured to receive the light from the transmitting end at the receiving end and propagate the light to the distributing end, wherein the waveguide is configured to propagate the light through the waveguide in dependence of polarization such that a distribution of the light at different locations of the distributing end is dependent on polarization of the light.

公开(公告)号：US11808627B2

公开(公告)日：2023-11-07

申请号：US17043774

申请日：2019-03-28

Applicant: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE ,  Sorbonne Universite ,  ECOLE NORMALE SUPERIEURE DE PARIS ,  UNIVERSITÉ PARIS CITÉ

Inventor： Kenneth Maussang ,  Sukhdeep Dhillon ,  Jerome Tignon

IPC: G01J1/44 ,  G01J4/04 ,  H01L31/0216 ,  H01L31/0224 ,  H01L31/09 ,  H01L31/0304 ,  G01J4/00 ,  G01J3/42 ,  G01J1/42 ,  G01J3/10 ,  G02F2/02

CPC classification number: G01J1/44 ,  G01J1/42 ,  G01J3/10 ,  G01J3/42 ,  G01J4/00 ,  G01J4/04 ,  H01L31/0216 ,  H01L31/0224 ,  H01L31/0304 ,  H01L31/09 ,  G01J2001/446 ,  G02F2/02 ,  G02F2203/13

Abstract: A photoconductive switch for generating or detecting terahertz radiation (TR) is provided. The photoconductive switch may comprise at least a first and a second pair of electrodes (EV, EH, EGR) on a surface (SS) of a photoconductive substrate, wherein the electrodes of the first pair are separated by a first gap comprising at least a plurality of first rectilinear sections (GV) extending along a first direction (x) and the electrodes of the second pairs are separated by a second gap comprising at least a plurality of second sections (GH) extending along a second direction (y), different from the first direction. The photoconductive switch may further comprise a patterned opaque layer (PML) selectively masking portions of the gaps between the electrodes. Methods and devices for generating and detecting terahertz radiation comprising such photoconductive switches are also provided.

公开(公告)号：US11796393B2

公开(公告)日：2023-10-24

申请号：US17126853

申请日：2020-12-18

Applicant: Valve Corporation

Inventor： Kameron Wade Rausch

IPC: G01J4/04 ,  G01N21/17 ,  G01N21/59

CPC classification number: G01J4/04 ,  G01N21/17 ,  G01N2021/1772 ,  G01N2021/5957

Abstract: Systems and methods for providing a polarimetry camera operative to obtain high fidelity surface characterization measurements. A polarimetry camera may include an multi-twist retarder component that is operative selectively switch between two or more polarization filtering states, wherein in each polarization filtering state, the multi-twist retarder component only passes light having a particular polarization state or orientation (e.g., horizontal linear polarization, vertical linear polarization, 45 degree linear polarization, circular polarization) and reflects or absorbs light having other polarization states. The multi-twist retarder may also include one or more diffraction patterns that focus light. The polarimetry camera may capture images using a sensor array as the multi-twist retarder is switched between the at least two polarization filtering states, thereby capturing a sequence of polarization specific images that may be displayed or used to determine one or more Stokes parameters for a scene in real-time.

公开(公告)号：US20180335346A1

公开(公告)日：2018-11-22

申请号：US16052044

申请日：2018-08-01

Applicant: KLA-Tencor Corporation

Inventor： Andrew V. Hill ,  Amnon Manassen ,  Yuri Paskover ,  Yuval Lubashevsky

IPC: G01J4/04 ,  G01B11/27 ,  G03F7/20

CPC classification number: G01J4/04 ,  G01B11/272 ,  G03F7/70633

Abstract: Metrology methods and systems are provided, in which the detected image is split at a field plane of the collection path of the metrology system's optical system into at least two pupil plane images. Optical elements such as prisms may be used to split the field plane images, and multiple targets or target cells may be measured simultaneously by spatially splitting the field plane and/or the illumination sources and/or by using two polarization types. The simultaneous capturing of multiple targets or target cells increases the throughput of the disclosed metrology systems.

公开(公告)号：US20180283951A1

公开(公告)日：2018-10-04

申请号：US15570557

申请日：2016-04-14

Applicant: RAINTREE SCIENTIFIC INSTRUMENTS (SHANGHAI) CORPORATION

Inventor： Fengjiao ZHONG ,  Haijun GAO ,  Jiangtao DANG

IPC: G01J4/04 ,  G01M11/02

CPC classification number: G01J4/04 ,  G01M11/02

Abstract: The present disclosure discloses a calibrating method, apparatus, and corresponding measurement system for a composite waveplate. The calibrating method comprises: A. determining a first matrix characterizing the composite waveplate, the first matrix including at least one unknown number; B. determining a theoretical relationship between a light intensity and an alignment angle offset value of the composite waveplate based on the first matrix; and C. calibrating based on the theoretical relationship between a light intensity and an alignment angle offset value of the composite waveplate determined in step (B) and actually measured light intensity data to obtain a second matrix that may characterize the composite waveplate and does not contain the unknown number. The technical solution of the present disclosure may greatly reduce the amount of unknown numbers when calibrating a composite waveplate or a measuring system, thereby lowering the difficulty of calibration and improving the precision of calibration.