公开(公告)号：US20040207855A1

公开(公告)日：2004-10-21

申请号：US10417066

申请日：2003-04-16

Applicant: Duke University

Inventor： David J. Brady ,  Michael E. Sullivar

IPC: G01B009/02

CPC classification number: G01J3/36 ,  G01J3/02 ,  G01J3/0205 ,  G01J3/0256 ,  G01J3/26 ,  G01J3/4531

Abstract: Methods and systems for static multimode multiplex spectroscopy are disclosed. According to a method for static multimode multiplex spectroscopy, spectral energy emanating from different points of a diffuse source is simultaneously received. Different multi-peak filter functions are applied to the spectral energy emanating from the different points to produce a multi-channel spectral measurement for each point. The multi-channel spectral measurements are combined to estimate a property of the diffuse source.

Abstract translation: 公开了用于静态多模多重光谱的方法和系统。 根据静态多模多重光谱的方法，同时接收从漫射源的不同点发出的光谱能量。 不同的多峰值滤波器功能被应用于从不同点发出的光谱能量，以产生每个点的多通道光谱测量。 组合多通道光谱测量以估计漫射源的属性。

公开(公告)号：US6111644A

公开(公告)日：2000-08-29

申请号：US549645

申请日：1983-11-07

Applicant: Paul T. Ballard

Inventor： Paul T. Ballard

IPC: G01J3/453 ,  G01J9/02 ,  G01B9/02

CPC classification number: G01J3/4531 ,  G01J9/02 ,  G01J9/0246

Abstract: Incoming optical radiation is divided into two focused beams with a relatively large amount of delay and shift introduced between the beams. Through the focusing of each of the beams to a different focal point (F1), (F2) a lead is created such that a circular or bull's-eye fringe pattern (60) is formed in a plane of observation (45). The position of the fringe pattern with respect to the output optical axis of the device is a function of the angle (.theta.) of the incoming coherent radiation with respect to the input optical axis of the device. The spacing of the fringe rings is a function of the frequency of the coherent radiation and the intensity of the fringe pattern is a function of the intensity and coherency of the beam of coherent radiation. The interferometer of the invention has a wide angle of reception and no moving parts.

Abstract translation: 进入的光辐射被分成两个聚焦光束，其具有在光束之间引入相对较大量的延迟和偏移。 通过每个光束的聚焦到不同的焦点（F1），（F2）产生引线，使得在观察平面（45）中形成圆形或牛眼条纹图案（60）。 条纹图案相对于装置的输出光轴的位置是输入的相干辐射相对于装置的输入光轴的角度（θ）的函数。 边缘环的间距是相干辐射的频率的函数，并且条纹图案的强度是相干辐射束的强度和相干性的函数。 本发明的干涉仪具有广泛的接收角度，没有移动部件。

公开(公告)号：US6031609A

公开(公告)日：2000-02-29

申请号：US865409

申请日：1997-05-29

Applicant: David J. Funk ,  David S. Moore

Inventor： David J. Funk ,  David S. Moore

IPC: G01J3/453 ,  G01J3/04

CPC classification number: G01J3/4531

Abstract: Fourier transform spectrometer using a multielement liquid crystal display. A ferroelectric liquid crystal mask is used as an optical encoder for a solid-state Fourier transform spectrometer. A 1.times.64 element array was striped and used as a 1.times.4 element device. The device intersected dispersed radiation and encoded each spectral component thereof with a carrier signal by applying half-wave potentials to each of the four striped (1.times.16) liquid crystal elements which varied the transmitted amplitude of the light from 0.03% to 28% of full scale. The light was spectrally recombined and imaged onto a photomultiplier and the resulting carrier frequencies (and their amplitudes) detected by Fourier transformation of the time-varying signal. Spectra of colored-glass filters were taken to demonstrate the spectrometer.

Abstract translation: 傅里叶变换光谱仪采用多元素液晶显示。 铁电液晶掩模用作固态傅里叶变换光谱仪的光学编码器。 1x64元素阵列被条纹化并用作1x4元素设备。 该器件通过将四分之一（1x16）液晶元件中的每一个施加半波电位，将散射的辐射与其每个光谱分量相乘，并对其进行编码，从而将光的透射振幅从满刻度的0.03％改变为28％ 。 光被光谱重组并成像到光电倍增管上，并通过时变信号的傅里叶变换检测所得到的载波频率（及其幅度）。 拍摄彩色玻璃滤光片的光谱仪来证明光谱仪。

公开(公告)号：US20230400354A1

公开(公告)日：2023-12-14

申请号：US18035271

申请日：2021-11-04

Applicant: ROCKLEY PHOTONICS LIMITED

Inventor： Richard GROTE

IPC: G01J3/453 ,  G01S17/894 ,  G01J3/28 ,  G01S7/481

CPC classification number: G01J3/4531 ,  G01S17/894 ,  G01J3/2823 ,  G01S7/4817 ,  G01S7/4815 ,  G01S7/4816 ,  G01J2003/2826

Abstract: A photonic integrated circuit for use in hyperspectral spectroscopy. The photonic integrated circuit comprising: a multi-spectral laser source, configured to produce a multi-spectral optical signal; a modulator, the modulator configured to split the multi-spectral optical signal into a first component and a second component, and apply an up-chirp modulation profile to the first component and a down-chirp modulation profile to the second component; a first transmitter and receiver module, configured to transmit the modulated first component and receive reflections of the first component; and a second transmitter and receiver module, configured to transmit the modulated second component and receive reflections of the second component.

公开(公告)号：US20230375408A1

公开(公告)日：2023-11-23

申请号：US18082659

申请日：2022-12-16

Applicant: Spectrove Inc.

Inventor： Kasra Khazeni

IPC: G01J3/453 ,  G01J3/02

CPC classification number: G01J3/4531 ,  G01J3/0208

Abstract: The present application relates to a system for performing time-resolved interferometric spectroscopy of incoming light. In some embodiments, the system includes one or more optical elements, a photo-detector, a capacitance detector, and one or more processors. Upon application of a varying input signal to the one or more optical elements, a change to an optical characteristic is caused resulting in a changing interference pattern produced by the incoming light incident on the one or more optical elements. During the application of the varying input signal, the photo-detector may detect an intensity of light output from the one or more optical elements and the capacitance detector may detect a capacitance of the one or more optical elements.

公开(公告)号：US20230349764A1

公开(公告)日：2023-11-02

申请号：US18214376

申请日：2023-06-26

Applicant: The Regents of the University of Colorado, a body corporate

Inventor： Gregory B. Rieker ,  Caroline B. Alden ,  Robert J. Wright ,  Sean C. Coburn

IPC: G01J3/453 ,  G01N21/27

CPC classification number: G01J3/4531 ,  G01N21/274 ,  G01J2003/2866

Abstract: A method for adaptive dual frequency-comb spectroscopy includes repeatedly (i) recording a single interferogram with a dual frequency-comb spectrometer, (ii) averaging the single interferogram into an averaged interferogram, and (iii) determining a signal-to-noise ratio (SNR) of the averaged interferogram, until the SNR of the averaged interferogram exceeds a SNR threshold. In certain embodiments, determining the SNR includes determining a signal amplitude of a center burst of the averaged interferogram and determining a noise level of the averaged interferogram from data points of the averaged interferogram located away from the center burst. In certain embodiments, determining the SNR includes Fourier transforming the averaged interferogram into a frequency spectrum and numerically integrating the frequency spectrum.

公开(公告)号：US20230221180A1

公开(公告)日：2023-07-13

申请号：US17819892

申请日：2022-08-15

Applicant: University of Hawaii

Inventor： Paul Lucey

IPC: G01J3/26 ,  G01J3/453 ,  G01J3/14

CPC classification number: G01J3/26 ,  G01J3/4531 ,  G01J3/14

Abstract: A spatial Fourier transform spectrometer is disclosed. The Fourier transform spectrometer includes a Fabry-Perot interferometer with first and second optical surfaces. The gap between the first and second optical surfaces spatially varies in a direction that is orthogonal to the optical axis of the Fourier transform spectrometer. The Fabry-Perot interferometer creates an interference pattern from input light. An image of the interference pattern is captured by a detector, which is communicatively coupled to a processor. The processor is configured to process the interference pattern image to determine information about the spectral content of the input light.

公开(公告)号：US09976904B2

公开(公告)日：2018-05-22

申请号：US15206266

申请日：2016-07-09

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Seiji Nishiwaki

IPC: G01J3/453 ,  G01J3/02 ,  G01J3/10

CPC classification number: G01J3/4531 ,  G01J3/0205 ,  G01J3/0208 ,  G01J3/0229 ,  G01J3/10 ,  G01J2003/102 ,  G01J2003/104 ,  G01J2003/4538

Abstract: In one aspect, an apparatus includes a first light source that applies first light having a first wavelength as a center wavelength to an object, a second light source that applies second light having a second wavelength as a center wavelength longer than the first wavelength to the object, an optical filter that includes first and second regions and that transmits third light produced by the first and second light each passed through or reflected by the object, first and second optical detectors that determine first and second amounts, respectively, of the third light passed through the first and second regions. The transmission ranges of spectral transmission curves of the first and second regions are located between the first wavelength and the second wavelength. The spectral transmission curve of the first region has a width at half maximum different from that of the spectral transmission curve of the second region.

公开(公告)号：US09970819B2

公开(公告)日：2018-05-15

申请号：US15009755

申请日：2016-01-28

Applicant: Si-Ware Systems

Inventor： Diaa Khalil ,  Bassam A. Saadany ,  Yasser M. Sabry

IPC: G01J5/02 ,  G01J3/45 ,  G01J3/10 ,  G01J3/02 ,  G01J3/26 ,  G01J3/453

CPC classification number: G01J3/45 ,  G01J3/0256 ,  G01J3/108 ,  G01J3/26 ,  G01J3/453 ,  G01J3/4531 ,  G01J3/4532 ,  G01J3/4535

Abstract: A spectrometer with increased optical throughput and/or spectral resolution includes a plurality of interferometers coupled in parallel. An optical splitter divides a source light beam into a plurality of input beams and directs each of the input beams to a respective one of the plurality of interferometers. One or more detectors are optically coupled to receive a respective output from each of the plurality of interferometers and is configured to detect an interferogram produced as a result of the outputs.

公开(公告)号：US20180128683A1

公开(公告)日：2018-05-10

申请号：US15806305

申请日：2017-11-07

Applicant: California Institute of Technology

Inventor： Seyedeh Sona Hosseini

IPC: G01J3/453 ,  G01J3/18 ,  G01J3/02

CPC classification number: G01J3/453 ,  G01J3/0202 ,  G01J3/0205 ,  G01J3/0218 ,  G01J3/0259 ,  G01J3/18 ,  G01J3/1804 ,  G01J3/4531 ,  G01J3/4532 ,  G01J2003/1204 ,  G01J2003/1208 ,  G01J2003/1861

Abstract: Novel monolithic cyclical reflective spatial heterodyne spectrometers (CRSHS) are presented. Monolithic CRSHS in accordance with the invention have a single frame wherein a flat mirror, roof mirror, and symmetric grating are affixed. The invention contains only fixed parts; the flat mirror, roof mirror, and symmetric grating do not move in relation to the frame. Compared to conventional CRSHS known in the art, the present invention enables much smaller and lighter CRSHS, requires less time and skill for maintenance, and is a better economic option. The disclosed invention may include fixed field-widening optical elements or a fiber-fed assembly.