公开(公告)号：US20180066990A1

公开(公告)日：2018-03-08

申请号：US15808898

申请日：2017-11-10

Applicant: Technische Universität München

Inventor： Michael Schardt

IPC: G01J3/45 ,  G01J3/02

CPC classification number: G01J3/45 ,  G01J3/021 ,  G01J3/453 ,  G01J3/4531

Abstract: A static Fourier transform spectrometer is disclosed that includes a beam splitter, a mirror device, and a collection optic. The beam splitter divides an input light beam into a first arm and a second arm, wherein the first arm is reflected by the beam splitter and the second arm passes through the beam splitter, wherein the first arm extends to the converging optical unit without deflection after reflection at the mirror device, wherein the second arm extends to the converging optical unit without deflection after passing through the beam splitter, and wherein the collection optic merges the first arm and the second arm for interference.

公开(公告)号：US20170234675A1

公开(公告)日：2017-08-17

申请号：US15517959

申请日：2015-10-08

Applicant: COLLAGE MEDICAL IMAGING LTD.

Inventor： Gavriel J. IDDAN ,  Roni ZVULONI

IPC: G01B9/02 ,  A61B10/04 ,  A61B5/00

CPC classification number: G01B9/02069 ,  A61B5/0066 ,  A61B5/7214 ,  A61B5/7257 ,  A61B10/04 ,  A61B2562/0233 ,  G01B9/02004 ,  G01B9/02014 ,  G01B9/02027 ,  G01B9/02044 ,  G01B9/02091 ,  G01B2290/45 ,  G01J3/10 ,  G01J3/36 ,  G01J3/4531 ,  G01N21/39 ,  G01N21/4795 ,  G01N2021/1787 ,  G01N2021/399

Abstract: The present application in some embodiments relates to methods for reducing noise and/or clutter when measuring a spectrum, particularly but not only for OCT imaging. In some embodiments a light source is synchronized with a detector. For example a narrow band light source is synchronized with a narrow band detector. For example, the light source may scan over multiple frequency bands and/or the detector may be tuned to a frequency band synergetic to the band of the light source. For example the light source and detector may be tuned to overlapping narrow bands. Optionally the detector has a sensor set for each frequency band. Optionally some sensor sets are individually resettable. For example each set may have a reset circuit. For example, a sensor set for a band not currently being measured is deactivated.

公开(公告)号：US09046422B2

公开(公告)日：2015-06-02

申请号：US13452686

申请日：2012-04-20

Applicant: Michael W. Kudenov

Inventor： Michael W. Kudenov

IPC: G01J3/45 ,  G01J3/453 ,  G01J3/28 ,  G01J3/02 ,  G01J3/447

CPC classification number: G01J3/4531 ,  G01J3/0208 ,  G01J3/0229 ,  G01J3/2803 ,  G01J3/447 ,  G01J2003/452

Abstract: Snapshot imaging Fourier transform spectrometers include a lens array that produces sub-images that are directed through a birefringent interferometer in orthogonal polarization eigenstates that acquire an optical path difference. Interference patterns based on this OPD can be Fourier transformed to obtain a spectral image. In some examples, polarizing gratings provide a spatial heterodyne frequency and offset the spectra.

Abstract translation: 快照成像傅里叶变换光谱仪包括透镜阵列，该透镜阵列产生通过双折射干涉仪引导获得光程差的正交偏振本征态的子图像。 基于该OPD的干涉图案可以进行傅里叶变换以获得光谱图像。 在一些示例中，偏振光栅提供空间外差频率并偏移光谱。

公开(公告)号：US09002151B2

公开(公告)日：2015-04-07

申请号：US13646450

申请日：2012-10-05

Applicant: Telcordia Technologies, Inc.

Inventor： Ted Woodward ,  Anjali Agarwal ,  Nicholas Peters

IPC: G02B6/24 ,  G02F1/365 ,  G01J3/45 ,  G01N21/17 ,  H01L31/0232 ,  G01J1/42 ,  G02B6/293 ,  G01J3/453 ,  G01J1/04 ,  G01N21/41 ,  G01J1/58 ,  G02F1/35 ,  G01S17/10 ,  G01S7/486 ,  G01S7/487 ,  H04B10/70 ,  G02F1/39

CPC classification number: G01N21/17 ,  G01J1/0425 ,  G01J1/0459 ,  G01J1/42 ,  G01J1/58 ,  G01J3/4531 ,  G01N21/41 ,  G01S7/486 ,  G01S7/487 ,  G01S17/10 ,  G02B6/29338 ,  G02F1/3536 ,  G02F1/39 ,  G02F2001/392 ,  H01L31/0232 ,  H04B10/70

Abstract: Systems for enhancing the sensitivity of detecting an optical signal using nonlinear optics and method of performing the same. In one embodiment, a single-photon detection system includes an optical amplifier realized in a waveguide, and a photodetector coupled to an output of the optical amplifier. A light detection and ranging system includes the optical amplifier coupled to an optical source and one photodetector. In another embodiment, a photodetection system includes a plurality of optical frequency converters, coupled to an optical source, that sequentially convert a wavelength of photons of the optical source to a final wavelength, and a single-photon photodetector coupled to the optical frequency converters to detect single photons produced by the optical source. In another embodiment, an optical sensor includes an optical pump, and a transducer including an optical ring cavity coupled to the optical pump and configured to utilize optical four-wave mixing to detect an external stimulus.

公开(公告)号：US20150085284A1

公开(公告)日：2015-03-26

申请号：US14518588

申请日：2014-10-20

Applicant: WAYNE STATE UNIVERSITY

Inventor： Gregory W. Auner ,  Changhe Huang ,  Christopher M. Thrush ,  Michelle Brusatori

IPC: G01J3/02 ,  G01J3/44 ,  G01J3/45

CPC classification number: G01J3/021 ,  G01J3/18 ,  G01J3/44 ,  G01J3/4412 ,  G01J3/45 ,  G01J3/4531 ,  G01J3/4532 ,  G02B5/1861

Abstract: An apparatus for performing Raman spectral analysis of a sample is described, comprising a coherent light source, an first optical chain to direct the coherent light to impinge on the sample, a second optical chain to direct the scattered light onto a diffraction grating, and a third optical chain to direct the diffracted light onto detection array. The diffraction grating is a stairstep with a metalized surface, and a plurality of metalized stripes on a flat surface is disposed in a direction orthogonal to the long dimension of the stairsteps. The region between the flat surface and the stairstep is transparent. The zeroth-order fringe is selected by a slit and directed onto camera. The resultant interferogram is Fourier transformed to produce a representation of the Raman spectrum.

Abstract translation: 描述了一种用于执行样本的拉曼光谱分析的装置，包括相干光源，用于引导相干光照射到样本上的第一光链，将散射光引导到衍射光栅上的第二光链，以及 第三光链以将衍射光引导到检测阵列上。 衍射光栅是具有金属化表面的阶梯，并且平坦表面上的多个金属化条纹沿着与步态的长尺寸正交的方向设置。 平坦表面和阶梯之间的区域是透明的。 零级条纹由狭缝选择并定向到相机上。 所得干涉图被傅立叶变换以产生拉曼光谱的表示。

公开(公告)号：US08964187B2

公开(公告)日：2015-02-24

申请号：US13578379

申请日：2011-02-07

Applicant: Manuel Fendler ,  Gilles Lafargues ,  Nicolas Guerineau ,  Sylvain Rommeluere ,  Florence De La Barriere

Inventor： Manuel Fendler ,  Gilles Lafargues ,  Nicolas Guerineau ,  Sylvain Rommeluere ,  Florence De La Barriere

IPC: G01J3/45 ,  G01J3/26 ,  G01J3/02 ,  G01J3/28 ,  G01J3/453

CPC classification number: G01J3/26 ,  G01J3/02 ,  G01J3/021 ,  G01J3/0256 ,  G01J3/0259 ,  G01J3/2823 ,  G01J3/4531 ,  H01L2224/16225

Abstract: A micro-machined optical measuring device including: a set of photosensitive detector elements situated on a given face of a first support; a second support, assembled to the first support, forming a prism and including a first face through which a visible radiation is intended to penetrate and a second face, forming a non-zero angle θ with the first face and a non-zero angle α with the given face of the first support, the second face being semi-reflective, the first support and the second support being positioned such that an interferometric cavity is made between the second face and the given face, the distance between the given face of the first support and the second face of the second support varying regularly.

Abstract translation: 一种微加工光学测量装置，包括：位于第一支撑件的给定面上的一组光敏检测元件; 第二支撑件，组装到第一支撑件上，形成棱镜并且包括可见光辐射穿过的第一面和形成非零角度的第二面; 具有第一面和与第一支撑件的给定面的非零角度α，第二面是半反射的，第一支撑件和第二支撑件被定位成使得在第二面和第二面之间形成干涉腔， 给定的面部，第一支撑件的给定面与第二支撑件的第二面之间的距离变化规律。

公开(公告)号：US08957377B2

公开(公告)日：2015-02-17

申请号：US14054599

申请日：2013-10-15

Applicant: Ronald T. Logan ,  Joseph R. Demers

Inventor： Ronald T. Logan ,  Joseph R. Demers

IPC: G01N21/39 ,  G01J3/427 ,  A61B5/05 ,  G01J3/10 ,  G01J3/42 ,  G01J3/453 ,  G01N21/3581 ,  G01N21/3586

CPC classification number: G01J3/427 ,  A61B5/0507 ,  G01J3/10 ,  G01J3/42 ,  G01J3/4531 ,  G01N21/3581 ,  G01N21/3586 ,  G01N21/39

Abstract: An apparatus for analyzing, identifying or imaging an target including first and second laser beams coupled to a pair of photoconductive switches to produce CW signals in one or more bands in a range of frequencies greater than 100 GHz focused on and transmitted through or reflected from the target; and a detector for acquiring spectral information from signals received from the target and using a multi-spectral heterodyne process to generate an electrical signal representative of some characteristics of the target. The lasers are tuned to different frequencies and a frequency shifter in the path of one laser beam allows the terahertz beam to be finely adjusted in one or more selected frequency bands.

Abstract translation: 一种用于分析，识别或成像目标的装置，包括耦合到一对光电导开关的第一和第二激光束，以在大于100GHz的频率的范围内的一个或多个频带中产生CW信号，该信号集中于并经由 目标; 以及检测器，用于从从目标接收的信号中获取光谱信息，并使用多光谱外差处理产生表示目标的某些特性的电信号。 将激光器调谐到不同的频率，并且在一个激光束的路径中的频移器允许在一个或多个所选频带中微调太赫兹波束。

公开(公告)号：US20140347659A1

公开(公告)日：2014-11-27

申请号：US14115575

申请日：2012-04-27

Applicant: Dominic Murphy ,  Kieran O'Manhoney

Inventor： Dominic Murphy ,  Kieran O'Manhoney

IPC: G01J3/02 ,  G01J3/28

CPC classification number: G01J3/0218 ,  G01J3/2803 ,  G01J3/2823 ,  G01J3/4531 ,  G01J9/02 ,  G01J9/0246 ,  G01J2009/0226

Abstract: A waveguide spectrum analyser comprises an input waveguide (10) for receiving a beam of electromagnetic radiation to be spectrally analysed, a plurality of output waveguides (14, 16) which are single mode for wavelengths longer than a certain minimum, a substantially wavelength independent splitter (18) for splitting the input radiation between the single-mode output waveguides, and an array (24) of radiation-sensitive detector elements (30). Each output waveguide has a respective exit port (20, 22) facing the detector array so that radiation from the exit port is diffracted onto the array. The separation of the exit ports and the distance to the detector array is selected such that at least for a range of wavelengths longer than the certain minimum a plurality of interference fringes are produced at the array each extending across sufficient detector elements to allow spatial sampling of the fringes above the Nyquist rate. Data processing means (26) is provided for sampling the detector array to capture an image of the fringes and transforming the captured image data to the frequency domain, preferably using HTP and/or DFTS processing techniques.

Abstract translation: 波导频谱分析仪包括用于接收要被频谱分析的电磁辐射束的输入波导（10），多于一个波长长于特定最小值的单模的多个输出波导（14,16），基本上不依赖于波长的分离器 （18），用于在单模输出波导之间分割输入辐射，以及辐射敏感检测器元件（30）的阵列（24）。 每个输出波导具有面向检测器阵列的相应出口（20,22），使得来自出口的辐射被衍射到阵列上。 选择出口的分离和到检测器阵列的距离，使得至少对于长于某一最小值的波长范围，在阵列处产生多个干涉条纹，每个干涉条纹遍及足够的检测器元件，以允许空间取样 奈奎斯特价格以上的边缘。 提供数据处理装置（26），用于对检测器阵列进行采样以捕获条纹图像，并优选使用HTP和/或DFTS处理技术将捕获的图像数据变换到频域。

公开(公告)号：US08830475B1

公开(公告)日：2014-09-09

申请号：US13969634

申请日：2013-08-19

Applicant: National Cheng Kung University

Inventor： Wei-Chih Wang ,  Benjamin Estroff ,  Chih-Han Chang ,  Fong-Chin Su

IPC: G01J3/45 ,  G01B9/02

CPC classification number: G01J3/45 ,  G01J3/021 ,  G01J3/4531 ,  G01J3/4532

Abstract: Disclosed is an interferometer comprising a light source, a reflective element, and a photodetector. The light source is configured to emit a light beam, and an angle is formed by inclusion between a direction to which the light beam travels and the reflective element, the photodetector is configured to be substantially perpendicular to the reflective element. The light beam is halved into a first light beam propagating by the included angle, and a second light beam reflected off the reflective element, the first light beam and the second light beam interfere each other to form an interferogram on the photodetector, which detects the interferogram. By benefit of above, the interferometer does not need to reposition its parts in order to make adjustment to interferogram, thereby simplifying optical element setup and minimizing physical volume of the interferomger. Also disclosed is a spectrometer including the same interferometer and a Fourier-transform-capable analyzer.

Abstract translation: 公开了一种包括光源，反射元件和光电检测器的干涉仪。 光源被配置为发射光束，并且通过在光束行进的方向与反射元件之间包含形成角度，光电检测器被配置为基本上垂直于反射元件。 光束被分成一个以夹角传播的第一光束，并且从反射元件反射的第二光束，第一光束和第二光束彼此相互干涉以在光电检测器上形成干涉图，该光检测器检测 干涉图。 受益于上述，干涉仪不需要重新定位其部件以便调整干涉图，从而简化了光学元件的设置并使干涉仪的体积最小化。 还公开了包括相同干涉仪和具有傅里叶变换的分析仪的光谱仪。

公开(公告)号：US20140247447A1

公开(公告)日：2014-09-04

申请号：US14067244

申请日：2013-10-30

Applicant: University of South Carolina

Inventor： Stanley Michael Angel ,  Jerry Chance Carter

IPC: G01J3/02 ,  G01J3/45 ,  G01J3/44

CPC classification number: G01J3/44 ,  G01J3/14 ,  G01J3/4531 ,  G01J2003/451 ,  G01N21/65

Abstract: The present subject matter is directed to a device for spectroscopy. The device includes an excitation source and a first spatial heterodyne interferometer configured to receive wavelengths from the excitation source and filter the wavelengths to produce fringes on a sample. The device also includes a second heterodyne interferometer configured to receive Raman wavelengths from the sample.

Abstract translation: 本发明涉及用于光谱学的装置。 该装置包括激发源和第一空间外差干涉仪，其被配置为从激发源接收波长并滤波波长以在样本上产生条纹。 该装置还包括配置成从样品接收拉曼波长的第二外差干涉仪。