公开(公告)号：US09681798B2

公开(公告)日：2017-06-20

申请号：US14933666

申请日：2015-11-05

Applicant: Ian W. Hunter ,  Yi Chen

Inventor： Ian W. Hunter ,  Yi Chen

IPC: A61B1/06 ,  G01J3/45 ,  G01J3/28 ,  G01J3/02 ,  G01J3/12 ,  G01J3/453

CPC classification number: A61B1/0638 ,  G01J3/0286 ,  G01J3/0291 ,  G01J3/1256 ,  G01J3/2823 ,  G01J3/45 ,  G01J3/453 ,  G01J3/4535

Abstract: Imaging spectrometers can be used to generate hyperspectral images for medical diagnoses, contaminant detection, and food safety inspections, among other applications. An exemplary imaging spectrometer includes an integrated position sensing array that measures the relative positions of the interferometer components based on an interference pattern generated by illuminating the interferometer with a reference beam. Such an imaging spectrometer includes a processor that controls the interferometer component position by actuating a voice coil and several piezo-electric elements to align the components with respect to each other and to provide a desired optical path length mismatch between the interferometer arms. In some cases, the processor may use feedback and feed forward control, possibly based on the actuators' transfer functions, for more precise positioning. The processor may also implement adaptive and recursive spectral sampling to reduce the image acquisition period.

公开(公告)号：US09677949B1

公开(公告)日：2017-06-13

申请号：US14526168

申请日：2014-10-28

Applicant: The Board of Regents of the University of Nebraska

Inventor： Ming Han

IPC: G01K11/32 ,  G01K1/26 ,  G01K11/12 ,  G01J3/45

CPC classification number: G01K11/3206 ,  G01J3/45 ,  G01J5/0821 ,  G01J5/602 ,  G01J2005/583 ,  G01K1/26 ,  G01K11/125

Abstract: An in-line fiber-optic temperature sensor is disclosed. In an implementation, the in-line fiber-optic temperature sensor includes an optically transmissive fiber, a reflector, a microstructured fiber defining a channel therein for receiving a fluid, and a Fabry-Perot cavity in fluid communication with the microstructured fiber. The microstructured fiber can be retained between the optically transmissive fiber and the reflector. The Fabry-Perot cavity defined by a material and configured to receive a gas having an index of refraction that changes in a known way with temperature and pressure changes in fluid communication with the channel of the microstructured fiber. The in-line fiber-optic temperature sensor also includes a chamber defined between the optically transmissive fiber and the microstructured fiber for connecting in fluid communication with a vacuum/pressure source for changing pressure. The in-line fiber-optic temperature sensor also includes a sensor for determining an optical interferometric reflection spectrum associated with the Fabry-Perot cavity.

公开(公告)号：US20170146401A1

公开(公告)日：2017-05-25

申请号：US15321757

申请日：2015-06-17

Applicant: Spectral Engines Oy

Inventor： Jarkko Antila

IPC: G01J3/26 ,  G01J3/45 ,  G01J3/02

CPC classification number: G01J3/26 ,  G01J3/0227 ,  G01J3/0286 ,  G01J3/28 ,  G01J3/45 ,  G01J9/0246 ,  G01J2003/2879 ,  G02B5/20 ,  G02F1/21

Abstract: A method for determining spectral calibration data (λcal(Sd), Sd,cal(λ)) of a Fabry-Perot interferometer (100) comprises: forming a spectral notch (NC2) by filtering input light (LB1) with a notch filter (60) such that the spectral notch (NC2) corresponds to a transmittance notch (NC1) of the notch filter (60), measuring a spectral intensity distribution (M(Sd)) of the spectral notch (NC2) by varying the mirror gap (dFP) of the Fabry-Perot interferometer (100), and by providing a control signal (Sd) indicative of the mirror gap (dFP), and determining the spectral calibration data (λcal(Sd), Sd,cal(λ)) by matching the measured spectral intensity distribution (M(Sd)) with the spectral transmittance (TN(λ)) of the notch filter (60).

公开(公告)号：US09625320B2

公开(公告)日：2017-04-18

申请号：US14856389

申请日：2015-09-16

Applicant: University of Southern California

Inventor： Mohammad Reza Chitgarha ,  Alan E. Willner ,  Amirhossein Mohajerin-Ariaei ,  Morteza Ziyadi ,  Salman Khaleghi

IPC: G01J3/45

CPC classification number: G01J3/45 ,  G02F1/35 ,  G02F1/37 ,  G02F2001/3507 ,  G02F2001/3548 ,  H04B10/00 ,  H04B10/613 ,  H04B10/63

Abstract: Systems and techniques relating to automatically-locked homodyne detection are described. A described system includes a first nonlinear element, a filter, and second nonlinear elements. The first nonlinear element can produce, based on an input signal and a first continuous wave (CW) signal, a first output signal that includes the input signal and a phase conjugate copy of the input signal. The filter can produce a filtered signal based on the first output signal and can be programmable to adjust an induced delay between the input signal and the phase conjugate signal. The second nonlinear elements can produce second output signals based on a second CW signal and differently weighted combinations of signal components within the filtered signal. The second output signals can include an in-phase output signal based on an in-phase version of the filtered signal and a quadrature output signal based on a quadrature version of the filtered signal.

公开(公告)号：US20160370227A1

公开(公告)日：2016-12-22

申请号：US15104905

申请日：2015-02-10

Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Tianxu ZHANG ,  Xiaobing DAI ,  Xiangyan LIU ,  Jindong FEI ,  Li LIU ,  Hongtao YU ,  Shoukui YAO

IPC: G01J3/02 ,  H04N5/232 ,  G01J3/28 ,  G01J3/45 ,  G01H9/00 ,  H04N5/33 ,  H04N5/225

CPC classification number: G01J3/0202 ,  G01H9/004 ,  G01J3/0208 ,  G01J3/021 ,  G01J3/0218 ,  G01J3/0264 ,  G01J3/2823 ,  G01J3/45 ,  G01J2003/2836 ,  H04N5/2251 ,  H04N5/2252 ,  H04N5/2254 ,  H04N5/23241 ,  H04N5/33

Abstract: The present invention discloses a moving platform infrared image-spectrum associated detection system, including an optical hood, a broadband optical system, a two-dimensional servo system, an infrared optical fiber, a Fourier interference spectrum module, an image-spectrum associated detection processing module, a power supply module, and a display module. Incident light enters from the optical hood to the broadband optical system, and is split by a spectroscope. Transmitted light is focused by a long-wave imaging lens group on an infrared detector for imaging. Reflected light is focused by a broadband spectrum lens group to an optical fiber coupler, enters the Fourier interference spectrum module through the infrared optical fiber to form an interference pattern, and undergoes Fourier transform to obtain spectral data. The image-spectrum associated detection processing module effectively merges infrared imaging and broadband spectral data, and the two-dimensional servo system is used to control a center orientation of the broadband optical system, thereby implementing target detection, tracking and spectrum measurement in a moving platform condition. The present invention can effectively isolate the system from disturbance of the moving platform, has the capability of simultaneously performing scene imaging, local area spectrum measurement, and multi-target tracking spectrum measurement, has a high speed and an adequate data amount, and has a broad application prospect.

Abstract translation: 本发明公开了一种移动平台红外图像相关检测系统，包括光学罩，宽带光学系统，二维伺服系统，红外光纤，傅里叶干涉光谱模块，图像相关检测处理 模块，电源模块和显示模块。 入射光从光学罩进入宽带光学系统，并被分光镜分离。 透射光通过长波成像透镜组聚焦在用于成像的红外检测器上。 反射光由宽带光谱透镜组聚焦到光纤耦合器，通过红外光纤进入傅里叶干涉光谱模块，形成干涉图案，进行傅里叶变换，得到光谱数据。 图像相关检测处理模块有效地融合了红外成像和宽带光谱数据，二维伺服系统用于控制宽带光学系统的中心定向，从而在移动平台中实现目标检测，跟踪和频谱测量 条件。 本发明可以有效地隔离系统与移动平台的干扰，具有同时执行场景成像，局域频谱测量和多目标跟踪频谱测量的能力，具有高速度和足够的数据量，并具有 广泛的应用前景。

公开(公告)号：US09459149B2

公开(公告)日：2016-10-04

申请号：US15023914

申请日：2014-09-26

Applicant: Universite de Technologie de Troyes

Inventor： Laurent Arnaud ,  Yassine Hadjar ,  Mikael Renault ,  Aurelien Bruyant ,  Sylvain Blaize

IPC: G01J3/28 ,  G01J3/45

CPC classification number: G01J3/45 ,  G01J3/0205 ,  G01J3/453 ,  G01J2003/283

Abstract: An evanescent wave microspectrometer includes a planar diopter separating two transparent media, an optical sensor with a pixel array, and disposed in the second transparent medium, and an interference device disposed such that at least a part of the interference device is in contact with evanescent waves generated at the surface of the diopter. The micro-spectrometer also includes a memory storing a map having a set of set of data grids including the optical response of said sensor for a set of quasi-monochromatic wavelengths of a calibration light source, and a calculator configured to determine the spectrum (ψ) of a test light source configured to generate evanescent waves at the surface of the diopter, on the basis of the map and the optical response of the sensor.

Abstract translation: 消逝波显微光谱仪包括分离两个透明介质的平面屈光度，具有像素阵列的光学传感器，并且设置在第二透明介质中，以及干涉装置，其设置成使得干扰装置的至少一部分与ev逝波接触 在屈光度表面产生。 微型光谱仪还包括存储器，存储具有一组数据网格的地图，所述一组数据网格包括用于校准光源的一组准单色波长的所述传感器的光学响应，以及被配置为确定光谱（ψ ），其被配置为基于所述地图和所述传感器的光学响应在所述屈光度的所述表面处产生ev逝波。

公开(公告)号：US20160282277A1

公开(公告)日：2016-09-29

申请号：US14667607

申请日：2015-03-24

Applicant: Sebastien Tixier ,  Frank Martin Haran

Inventor： Sebastien Tixier ,  Frank Martin Haran

IPC: G01N21/84 ,  G01J3/45 ,  G01N21/3563 ,  G01B11/06 ,  G01G9/00

CPC classification number: G01N21/8422 ,  G01B11/0625 ,  G01B11/0675 ,  G01G9/00 ,  G01G9/005 ,  G01J3/45 ,  G01N21/031 ,  G01N21/31 ,  G01N21/3559 ,  G01N21/3563 ,  G01N21/86 ,  G01N2021/3155 ,  G01N2021/8427 ,  G01N2021/8609 ,  G01N2201/061 ,  G01N2201/068

Abstract: Continuous on-line thin film measurements employ a sensor having a spectrometer for interferometric measurements and a stack of single channel detectors for adsorption measurements. The stack is separated from the spectrometer, which analyzes radiation that emerges (transmitted pass or reflected from) the film, whereas the stack analyzes radiation that has passed through the film multiple times. The spectrometer is (i) positioned directly opposite the source of radiation so that it detects transmitted radiation or (ii) disposed on the same side of the film as is the source of radiation so that the spectrometer detects radiation that is specularly reflected from the film. The sensor includes a broadband radiation source emitting visible to far infrared light which propagates through a measurement cell defined by reflective surfaces exhibiting Lambertian-type scattering. The sensor is capable of measuring thin plastic films with thicknesses down to 1 micron or less.

Abstract translation: 连续在线薄膜测量使用具有用于干涉测量的光谱仪的传感器和用于吸附测量的单通道检测器的堆叠。 堆叠与光谱仪分离，光谱仪分析出现（辐射通过或从膜反射）的辐射，而堆叠分析已经通过膜的辐射多次。 光谱仪是（i）直接与辐射源相对放置，以便它检测透射辐射，或（ii）设置在与辐射源相同的膜侧，使得光谱仪检测从膜的镜面反射的辐射 。 传感器包括向远红外光发射可见的宽带辐射源，其传播通过表现朗伯型散射的反射表面限定的测量单元。 传感器能够测量厚度低于1微米或更小的薄塑料薄膜。

公开(公告)号：US20160245697A1

公开(公告)日：2016-08-25

申请号：US15031786

申请日：2014-10-31

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Katsumi SHIBAYAMA ,  Takashi KASAHARA ,  Masaki HIROSE ,  Toshimitsu KAWAI

IPC: G01J3/26

CPC classification number: G01J3/26 ,  G01J3/0286 ,  G01J3/45 ,  G01J5/04 ,  G01J5/20 ,  G02B26/001

Abstract: A spectral sensor includes a Fabry-Perot interference filter which is provided with an opening to pass light transmitted according to a distance between a first mirror and a second mirror along a facing direction; a light detector which has a light reception unit to receive the light having passed through the opening; a wiring substrate on which the light detector is mounted; and a plurality of spacers which support the filter on the wiring substrate, such that a second space continuous with a first space in the opening and including the first space when viewed from the facing direction is formed between the filter and the wiring substrate. The light detector is disposed in the second space. The light reception unit is disposed in a region corresponding to the first space in the second space, when viewed from the facing direction.

Abstract translation: 光谱传感器包括法布里 - 珀罗干涉滤光器，其设置有开口，以沿着沿着相对方向的第一反射镜和第二反射镜之间的距离传播的光; 光检测器，其具有用于接收已经穿过所述开口的光的光接收单元; 其上安装有光检测器的布线基板; 以及多个间隔件，其在所述布线基板上支撑所述滤波器，使得在所述滤波器和所述布线基板之间形成有与所述开口中的第一空间连续并且在从所述相对方向观察时包括所述第一空间的第二空间。 光检测器设置在第二空间中。 当从相对的方向观察时，光接收单元设置在与第二空间中的第一空间对应的区域中。

公开(公告)号：US20160224016A1

公开(公告)日：2016-08-04

申请号：US14414653

申请日：2014-02-14

Applicant: Halliburton Energy Servies, Inc.

Inventor： James M Price ,  Aditya B. Nayak ,  David L. Perkins

IPC: G05B19/4099

CPC classification number: G05B19/4099 ,  B29D11/0073 ,  B32B3/266 ,  B32B2307/40 ,  B32B2307/418 ,  B32B2307/732 ,  B32B2551/00 ,  G01J3/0264 ,  G01J3/0286 ,  G01J3/08 ,  G01J3/12 ,  G01J3/28 ,  G01J3/45 ,  G01J2003/1226 ,  G01N21/31 ,  G01N21/8422 ,  G01N2021/8438 ,  G02B5/285 ,  G02B5/287 ,  G05B2219/49023

Abstract: Technologies are described for monitoring characteristics of layers of integrated computational elements (ICEs) during fabrication using an in-situ spectrometer operated in step-scan mode in combination with lock-in or time-gated detection. As part of the step-scan mode, a wavelength selecting element of the spectrometer is discretely scanned to provide spectrally different instances of probe-light, such that each of the spectrally different instances of the probe-light is provided for a finite time interval. Additionally, an instance of the probe-light interacted during the finite time interval with the ICE layers includes a modulation that is being detected by the lock-in or time-gated detection over the finite time interval.

Abstract translation: 描述了技术，用于在使用以逐步扫描模式操作的原位光谱仪结合锁定或时间门控检测在制造期间监测集成计算元件（ICE）的层的特性。 作为步进扫描模式的一部分，离子扫描光谱仪的波长选择元件以提供光谱不同的探测光的实例，使得探针光的每个光谱不同的实例被提供有限的时间间隔。 另外，在与ICE层的有限时间间隔期间相互作用的探测光的实例包括在有限时间间隔内通过锁定或时间选通检测来检测的调制。

公开(公告)号：US09377359B1

公开(公告)日：2016-06-28

申请号：US14613482

申请日：2015-02-04

Applicant: Axetris AG

Inventor： Andreas Wittmann ,  Marc-Oliver Zufferey ,  Urs Boegli ,  Kai Hassler

IPC: G01N21/00 ,  G01J3/45 ,  G01J3/28 ,  G01J3/44

CPC classification number: G01J3/45 ,  G01J3/0262 ,  G01J3/2803 ,  G01J3/4338 ,  G01J3/4412 ,  G01N21/3504 ,  G01N21/39

Abstract: An optical measuring system and a method for gas detection, the optical measuring system including a light emitter and at least one light detector arranged in at least one housing, wherein the light emitter emits a modulated main light beam with a mean wave length λ0 with a modulation span Δλ. At least one opto-mechanical component, e.g. a housing window including optically effective boundary surfaces, is arranged between the light emitter and the light detector and causes scatter light beams which interfere with the main light beam so that self-mixing occurs and/or etalons are caused. According to the invention the at least one opto-mechanical component is arranged relative to the light emitter and/or the light detector at an optimized distance L which is a function of the wave length λ0 and the modulation span Δλ of the main light beam.

Abstract translation: 一种光学测量系统和用于气体检测的方法，所述光学测量系统包括光发射器和布置在至少一个壳体中的至少一个光检测器，其中所述发光器发射具有平均波长λ0的调制主光束，其具有 调制范围＆Dgr;λ。 至少一个光机械部件，例如。 在光发射器和光检测器之间设置包括光学有效边界面的外壳窗，并引起与主光束干涉的散射光束，从而引起自发混合和/或标准具。 根据本发明，至少一个光机械部件相对于光发射器和/或光检测器以优化距离L布置，该距离L是主光的波长λ0和调制范围＆Dgr;λ的函数 光束。