公开(公告)号：US4995724A

公开(公告)日：1991-02-26

申请号：US393805

申请日：1989-08-14

Applicant: Yoji Sonobe ,  Takao Tanimoto

Inventor： Yoji Sonobe ,  Takao Tanimoto

IPC: G01J1/16 ,  G01J3/28 ,  G01J3/447 ,  G01J4/00

CPC classification number: G01J3/28 ,  G01J4/00 ,  G01J1/1626 ,  G01J3/447

Abstract: A spectroscope device of the dispersion type receives light to be measured and emits it as dispersed light which corresponds to each of wavelengths to be measured. An optical-path switching device directs the dispersed light emitted from the spectroscope device to pass through first and second paths. A first photoelectric converter receives the light which is directed to pass through the first path by the optical-path switching device. A polarizing/separating device polarizes and separates the light, which is directed to pass through the second path by the optical-path switching device, into two polarized lights. Second and third photoelectric converters respectively receive the two polarized lights divided by the polarizing/separating device. An arithmetical process section corrects a first optical spectrum strength according to an output from the first photoelectric converter with at least a ratio of second and third optical spectrum strengths which correspond to outputs from the second and third photoelectric converter to calculate absolute spectrum values of the measured light at every wavelength of the light to be measured.

公开(公告)号：US20230384402A1

公开(公告)日：2023-11-30

申请号：US18208652

申请日：2023-06-12

Applicant: TAE TECHNOLOGIES, INC.

Inventor： Marcel Nations

IPC: G01R33/26 ,  G21B1/05 ,  G21B1/23 ,  G01J3/447

CPC classification number: G01R33/26 ,  G01J3/447 ,  G21B1/23 ,  G21B1/052

Abstract: Systems, devices and methods that facilitate non-intrusive measurement and validation of field-reversal of a core plasma by combining DFSS and blended Zeeman concepts (i.e., sub-Doppler circular dichroism spectroscopy).

公开(公告)号：US20230304921A1

公开(公告)日：2023-09-28

申请号：US17966894

申请日：2022-10-17

Applicant: Nankai University

Inventor： MENG-XIN REN ,  WEI WU ,  ZHANG-HANG ZHU ,  DI ZHANG ,  WEI CAI ,  JING-JUN XU

IPC: G01N21/21 ,  G01J4/04 ,  G01J3/447

CPC classification number: G01N21/211 ,  G01J4/04 ,  G01J3/447 ,  G01N2021/213

Abstract: The disclosure relates to an infrared measurement method and apparatus, a computer device, a storage medium, and a computer program product. The method includes: detecting intensity information of sum-frequency mixing light projected on different polarization bases in a to-be-measured scene, the sum-frequency mixing light is generated in a sum-frequency mixing process of infrared signal light and pump light; determining polarization information of the sum-frequency mixing light according to the intensity information of the sum-frequency mixing light projected on the different polarization bases; determining polarization information of the infrared signal light according to the polarization information of the sum-frequency mixing light and a Mueller matrix, the Mueller matrix is constructed based on a second-order nonlinear polarizability corresponding to a sum-frequency mixing device and the polarization information of the pump light; determining detection information of a to-be-measured target in the to-be-measured scene according to the polarization information of the infrared signal light.

公开(公告)号：US20180283948A1

公开(公告)日：2018-10-04

申请号：US15765698

申请日：2016-10-06

Applicant: Hinds Instruments, Inc.

Inventor： Baoliang Wang

IPC: G01J3/447 ,  G01J4/04 ,  G01N21/19 ,  G01N21/21 ,  G01N21/25

CPC classification number: G01J3/447 ,  G01J3/0205 ,  G01J3/0224 ,  G01J4/04 ,  G01J2004/001 ,  G01N21/19 ,  G01N21/21 ,  G01N21/253 ,  G01N2021/216

Abstract: Example embodiments of methods, apparatus, and systems for measuring polarimetric parameters using spectroscopy are disclosed herein. Particular embodiments concern circular dichroism (CD) spectrometers that use a vertically aligned beam. In such embodiments, the solution being analyzed may have a top surface that forms a convex or concave meniscus, creating a surface through which the measuring beam passes that may refract the beam in undesirable ways. Accordingly, particular embodiments of the disclosed technology include one or more meniscus-compensating (meniscus-effect-reducing) components or subsystems. These components and/or subsystems can be used alone or in combination with one another to reduce the undesirable refractive effects caused by the meniscus at the solution's surface, thereby improving the resulting quality of the spectroscopy measurement and potentially improving the speed with which CD spectroscopy can be performed.

公开(公告)号：US20180245976A1

公开(公告)日：2018-08-30

申请号：US15526933

申请日：2016-08-22

Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Changjian KE ,  Deming LIU ,  Chen XING ,  Ke ZHANG

IPC: G01J3/02 ,  G01J3/447 ,  G02B6/27

CPC classification number: G01J3/0224 ,  G01J3/0218 ,  G01J3/44 ,  G01J3/447 ,  G02B6/27 ,  G02B6/2706 ,  G02B6/2746 ,  G02B6/2786

Abstract: The present invention discloses a device and a method for realizing spectral polarization-independent measurement based on a frequency domain depolarization structure. The device comprises a pump light source module, a depolarization module, an SBS effect generation module and a data acquisition and spectrum reconstruction module. The method comprises: emitting laser light having a fixed polarization state from the pump light source module; the laser light from an output end of the pump light source module passing through the depolarization module to become depolarized light; inputting the depolarized light as pump light into the SBS effect generation module to interact with signal light under test input from the outside into the SBS effect generation module; and after amplifying the signal light under test through the SBS effect generation module, performing data acquisition processing through the data acquisition and spectral reconstruction module and finally obtaining a spectrum of a signal under test. The present invention can eliminate the problems that the acquired spectral information is not accurate, the power measurement is not stable and the like when a spectral measurement device based on an SBS effect measures an input signal light having arbitrary polarization state, and has an important application prospect.

公开(公告)号：US09983059B2

公开(公告)日：2018-05-29

申请号：US15502430

申请日：2015-07-13

Applicant: ARCHIMEJ TECHNOLOGY

Inventor： Mejdi Nciri ,  Eric Christian Belarbre ,  Henri Leung

IPC: G01J3/28 ,  G01J3/447 ,  G01J3/10 ,  G01J3/433

CPC classification number: G01J3/447 ,  G01J3/10 ,  G01J3/4338 ,  G01J2003/102

Abstract: Disclosed is a spectroscopy device, including an analysis zone for receiving a sample; at least one light-emitting diode arranged to emit a light beam towards the analysis zone, having a luminous intensity spectral profile in a working wavelength interval; unit for varying with time the luminous intensity spectral profile emitted by the diode in the working wavelength interval of the diode; a detector, arranged to receive, during a variation with time of the luminous intensity spectral profile emitted by the diode, the light beam emitted by the diode and having crossed the analysis zone, and supplying a detection signal of the light beam emitted by the diode and received by the detector, in the form of a signal which depends on at least one characteristic representative of the luminous intensity spectral profile of the light-emitting diode. Application to derivative spectroscopy.

公开(公告)号：US09979853B2

公开(公告)日：2018-05-22

申请号：US15484035

申请日：2017-04-10

Applicant: Digimarc Corporation

Inventor： Geoffrey B. Rhoads ,  Alastair M. Reed

IPC: G06K9/00 ,  H04N1/32 ,  G01J3/02 ,  G01J3/28 ,  G01J3/36 ,  G01J3/447 ,  G01J3/51 ,  G06T1/00 ,  H04N5/225 ,  H04N5/235 ,  H04N9/04 ,  H04N21/8358 ,  H05B33/08 ,  H05B37/02 ,  A61B5/00

CPC classification number: H04N1/32309 ,  A61B5/0075 ,  G01J3/0272 ,  G01J3/2823 ,  G01J3/36 ,  G01J3/447 ,  G01J3/51 ,  G01J3/513 ,  G06T1/0028 ,  G06T2201/0051 ,  H04N1/32144 ,  H04N5/2254 ,  H04N5/2256 ,  H04N5/2354 ,  H04N9/045 ,  H04N21/8358 ,  H04N2201/3233 ,  H05B33/0869 ,  H05B37/0272

Abstract: Information is encoded in an image signal by exploiting spectral differences between colors that appear the same when rendered. These spectral differences are detected using image sensing that discerns the spectral differences. Spectral difference detection methods include using sensor-synchronized spectrally-structured-light imaging, 3D sensors, imaging spectrophotometers, and higher resolution Bayer pattern capture relative to resolution of patches used to convey a spectral difference signal.

公开(公告)号：US20180120154A1

公开(公告)日：2018-05-03

申请号：US15554326

申请日：2015-09-25

Applicant: Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences

Inventor： Lifu ZHANG ,  Hongming ZHANG

IPC: G01J3/02 ,  G01J3/447

CPC classification number: G01J3/0224 ,  G01J3/02 ,  G01J3/0278 ,  G01J3/447

Abstract: Disclosed are a snapshot-type polarized hyperspectral camera and an imaging method. The camera comprises polarizers (11), an image sensor (12), and a spectra filter (13). The spectra filter (13) is located on the image sensor (12). The polarizers (11) are located on one side of the image sensor (12). The method comprises: shielding and transmitting incident light by means of polarizers (11), so as to obtain light signals (101) with different polarizing angles; receiving, by means of an image sensor (12), the light signals with different polarizing angles, which are obtained by the polarizers (11), and converting the light signals with different polarizing angles into electric signals (102); and receiving, by means of a spectra filter (13), the electric signals converted by the image sensor (12), and filtering the electric signals, so as to obtain high-frequency electric signals (103) with a preset wavelength. By integrating a spectra filter (13) on a tiled pixel array of a sensor, a rapidly changing scene can be imaged; and meanwhile, by sticking a plurality of polarizers (11) into each channel with a specific wavelength, more exquisite imaging is realized.

公开(公告)号：US09912882B2

公开(公告)日：2018-03-06

申请号：US14785123

申请日：2014-04-16

Applicant: MBDA UK LIMITED

Inventor： Christopher Greenway ,  Richard Charles Simmons

IPC: H04N5/33 ,  G01J3/02 ,  G01J3/28 ,  G01J3/447 ,  G01J3/50 ,  G01J4/04 ,  G06T5/50 ,  G06T7/11 ,  G02B5/30 ,  G02B27/28

CPC classification number: H04N5/33 ,  G01J3/0208 ,  G01J3/0224 ,  G01J3/0235 ,  G01J3/0264 ,  G01J3/027 ,  G01J3/2823 ,  G01J3/447 ,  G01J3/50 ,  G01J4/04 ,  G01J2003/2826 ,  G02B5/3058 ,  G02B27/288 ,  G06T5/50 ,  G06T7/11 ,  G06T2207/10036 ,  G06T2207/10048 ,  G06T2207/20224 ,  G06T2210/61

Abstract: An imaging apparatus and method are provided for improving discrimination between parts of a scene enabling enhancement of an object in the scene. A camera unit is arranged to capture first and second images from the scene in first and second distinct and spectrally spaced apart wavebands. An image processing unit processes the images so captured and processes polarimetric information in the images to enable better discrimination between parts of the scene. An image of the scene, including a graphical display of the polarimetric information, may be displayed on a visual display unit thus enhancing an object in the scene for viewing by a user. Correlation parameters indicating, possibly on a pixel-by-pixel basis, the correlation between the actual image intensity at each angle of polarization and a modelled expected image intensity may be used to enhance the visibility of an object.

公开(公告)号：US09885614B2

公开(公告)日：2018-02-06

申请号：US14968237

申请日：2015-12-14

Applicant: BEIHANG UNIVERSITY

Inventor： Zheng Zheng ,  Xin Zhao ,  Lei Liu ,  Jiansheng Liu

IPC: G01J11/00 ,  G01J3/42 ,  G01J3/10 ,  G01J3/447 ,  G01J3/02 ,  G01J3/433 ,  G01J1/10 ,  G02F1/365 ,  H01S3/00 ,  G02F1/35 ,  G02F1/37 ,  H01S3/067 ,  H01S3/11 ,  H01S3/23 ,  H01S3/08

CPC classification number: G01J11/00 ,  G01J1/10 ,  G01J3/0224 ,  G01J3/0245 ,  G01J3/10 ,  G01J3/108 ,  G01J3/42 ,  G01J3/433 ,  G01J3/447 ,  G02F1/353 ,  G02F1/365 ,  G02F1/37 ,  G02F2203/13 ,  H01S3/0092 ,  H01S3/06791 ,  H01S3/0809 ,  H01S3/1106 ,  H01S3/1112 ,  H01S3/2391

Abstract: A method and a system for measuring an optical asynchronous sample signal. The system for measuring an optical asynchronous sampling signal comprises a pulsed optical source capable of emitting two optical pulse sequences with different repetition frequencies, a signal optical path, a reference optical path, and a detection device. Since the optical asynchronous sampling signal can be measured by merely using one pulsed optical source, the complexity and cost of the system are reduced. A multi-frequency optical comb system using the pulsed optical source and a method for implementing the multi-frequency optical comb are further disclosed.