公开(公告)号：US5002395A

公开(公告)日：1991-03-26

申请号：US305196

申请日：1989-02-02

Applicant: Manhar L. Shah

Inventor： Manhar L. Shah

IPC: G01R23/17

CPC classification number: G01J3/1256 ,  G01J3/02 ,  G01J3/0224 ,  G01J3/2803 ,  G01J3/453 ,  G01J3/457 ,  G01R23/17

Abstract: An interferometric spectrum analyzer employs a pair of Bragg cells arranged in an optically cascaded configuration such that both the signal beam and the reference beam travel along a common optical path. The beam-modifying properties of the Bragg cells are such that within a prescribed bandwidth of operation, the deflection properties of the respective cells are frequency complementary, namely different frequencies applied to the respective cells deflect the beam passing therethrough along the same optical path, to produce a beat frequency at the Fourier transform plane. In accordance with a first embodiment, complementary deflection action is achieved by using Bragg cells having respectively different acoustic velocites. In a second embodiment, each Bragg cell has the same acoustic velocity. The deflection/frequency complementary effect is obtained by the use of a birefringent material prism interposed between the Bragg cells, which produces angular deviation that depends upon the polarization and the direction of propagation of light passing through the prism.

Abstract translation: 干涉测量频谱分析仪采用布置在光级联配置中的一对布拉格单元，使得信号光束和参考光束沿着公共光路传播。 布拉格单元的波束修正特性使得在规定的操作带宽内，各个单元的偏转特性是频率互补的，即施加到各个单元的不同频率将沿着相同光路偏转的光束偏转到 在傅立叶变换平面产生拍频。 根据第一实施例，通过使用具有不同声速的布拉格电池来实现互补偏转动作。 在第二实施例中，每个布拉格单元具有相同的声速。 偏转/频率互补效应通过使用插入在布拉格单元之间的双折射材料棱镜获得，其产生取决于通过棱镜的光的偏振和传播方向的角度偏差。

公开(公告)号：US4652756A

公开(公告)日：1987-03-24

申请号：US736199

申请日：1985-05-20

Applicant: Frederick M. Ryan ,  Robert L. Nelson

Inventor： Frederick M. Ryan ,  Robert L. Nelson

IPC: G01N21/35 ,  G01J3/12 ,  G01J3/42 ,  G01N21/53 ,  G02F1/11

CPC classification number: G01J3/1256 ,  G01J3/42 ,  G01N2021/536 ,  G01N21/3504

Abstract: An improved automated acousto-optic analyzer system includes an acousto-optic tunable filter which is coupled with a source of radiation to produce pulsed light at predetermined wavelengths. This light is transmitted through a gas stack containing gases to be analyzed, to a distant detector. The configuration of the acousto-optic tunable filter, radiation source on one side of an environment of interest and a detector on the opposite side of an environment of interest produces spatial separation of the tuned, diffracted light from the undiffracted broad spectrum of the light source at the detector. This configuration eliminates the need for polarizers in the system. It also combines the tuning function of the AOTF with a chopping function, allowing extraneous radiation to be discriminated against. Thus the improved configuration of the disclosed invention permits effective operation of the gas analysis system in a gas stack characterized by extremely high ambient temperatures.

Abstract translation: 改进的自动声光分析仪系统包括声光可调滤波器，其与辐射源耦合以产生预定波长的脉冲光。 该光通过包含待分析气体的气体堆叠传输到远距离检测器。 声光可调谐滤波器，感兴趣环境一侧的辐射源和感兴趣的环境相对侧上的检测器的配置产生了调谐的衍射光与光源的未衍射广谱的空间分离 在检测器。 该配置消除了系统中偏振器的需要。 它还将AOTF的调谐功能与斩波功能结合在一起，允许对外部辐射进行区分。 因此，所公开的发明的改进的构造允许气体分析系统在特征在于极高的环境温度的气体堆叠中的有效操作。

公开(公告)号：US4622845A

公开(公告)日：1986-11-18

申请号：US714582

申请日：1985-03-21

Applicant: Frederick M. Ryan ,  Donald W. Feldman

Inventor： Frederick M. Ryan ,  Donald W. Feldman

IPC: G01N21/00 ,  G01J3/12 ,  G01N21/17 ,  G01N29/00

CPC classification number: G01N21/1702 ,  G01J3/1256 ,  G01N2021/1704

Abstract: The invention provides an apparatus for the detection of a selected species in a gas sample and includes a photo-acoustic detector coupled to an infrared radiation source with an acousto-optic tunable filter disposed between the source of infrared radiation and photo-acoustic detector. This combination is capable of measuring concentrations of controlled vapors in the parts-per-million range. These measurements may be performed in a few seconds via the portable gas detection and measurement device of this invention.

Abstract translation: 本发明提供了一种用于检测气体样品中所选物种的装置，并且包括耦合到红外辐射源的光声检测器，其中设置在红外辐射源和光声检测器之间的声光可调谐滤光器。 这种组合能够测量百万分之几的受控蒸气浓度。 这些测量可以在几秒钟内通过本发明的便携式气体检测和测量装置进行。

公开(公告)号：US12007323B2

公开(公告)日：2024-06-11

申请号：US17991721

申请日：2022-11-21

Applicant: EPIR, Inc.

Inventor： Wei Gao ,  Chang Yong ,  Silviu Velicu ,  Sivalingam Sivananthan

IPC: G01J3/10 ,  G01J3/12 ,  G01N21/25 ,  G01N21/35

CPC classification number: G01N21/255 ,  G01J3/108 ,  G01J3/1256 ,  G01N21/35

Abstract: A multiband IR adjunct (MIRA) sensor to spectroscopically determine the content and the concentration of chemical composition of a targeted object, includes a sensor housing, a first front optics in a first optical channel, a second front optics in the first optical channel, an acousto-optic tunable filter (AOTF), a photo detector (PD), a set of back optics in the first optical channel that focuses polarized narrow-band light beams received from the AOTF device onto the PD, the PD converting the polarized narrow-band light beams into an electrical signal, and a data acquisition unit signal-connected to the PD, the data acquisition unit collecting the electrical signals. Multiple optical channels can be provided within the housing to analyze UV/VIS/near infrared (NIR), short-wavelength infrared (SWIR), mid-wavelength infrared (MWIR), and LWIR wavelength ranges respectively.

公开(公告)号：US20180364158A1

公开(公告)日：2018-12-20

申请号：US15628566

申请日：2017-06-20

Applicant: KONICA MINOLTA LABORATORY U.S.A., INC.

Inventor： Leiming Wang ,  Jun Amano

IPC: G01N21/3581 ,  G06K9/00 ,  G01J3/12

CPC classification number: G01N21/3581 ,  G01J3/108 ,  G01J3/1256 ,  G01J2003/423 ,  G06K9/0063

Abstract: A terahertz (THz) spectral imaging system includes a THz 2D imaging camera, a tunable THz bandpass filter before the THz camera, and a broadband THz light source. The tunable THz bandpass filter includes a visible or infrared laser source, a spatial light modulator modulating the light to generate a spatially structured light pattern, and a semiconductor plate onto which the light pattern is projected. The light pattern generates carriers in the semiconductor plate to turn it into a metamaterial THz bandpass filter, which is tunable by changing the light patterns. A controller controls the light patterns and the THz camera in a timing sequence to acquire multiple 2D THz images at different THz frequencies. Such THz spectral image data can be further combined with visible images and LiDAR images in a security surveillance system to automatically detect security threats using image fusion and deep learning techniques.

公开(公告)号：US09696568B2

公开(公告)日：2017-07-04

申请号：US15153569

申请日：2016-05-12

Applicant: Lasertec Corporation

Inventor： Jun Sakuma

IPC: G02F1/11 ,  G02F1/35 ,  H01S3/00 ,  G02F1/355 ,  G02B27/14 ,  G01N21/95 ,  G01J1/04 ,  G01J3/12 ,  G01N21/17 ,  G01N21/63

CPC classification number: G02F1/113 ,  G01J1/0407 ,  G01J3/1256 ,  G01N21/1702 ,  G01N21/636 ,  G01N21/9501 ,  G01N2201/06113 ,  G01N2201/068 ,  G02B27/141 ,  G02F1/116 ,  G02F1/3534 ,  G02F1/3551 ,  H01S3/005 ,  H01S3/0085 ,  H01S3/0092 ,  H01S3/1306 ,  H01S3/2391

Abstract: Provided are a light source apparatus and an inspection apparatus that can stably output a wavelength converted light beam. A light source apparatus includes a laser light source that generates a first fundamental light beam, at least one nonlinear optical crystal that generates a wavelength converted light beam using the fundamental light beam or a harmonic laser beam of the fundamental light beam as an incident light beam, a detector that detects the wavelength converted light beam, an acousto-optic modulator that is disposed in an optical path of the incident light beam in such a way that a zero-order light beam enters the nonlinear optical crystal, and a controller that controls an output intensity of the wavelength converted light beam according to a detection signal from the detector.

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：US20160278678A1

公开(公告)日：2016-09-29

申请号：US15044097

申请日：2016-02-15

Applicant: The Trustees of Dartmouth College

Inventor： Pablo Valdes ,  Frederic Leblone ,  Keith D. Paulsen ,  Brian Campbell Wilson ,  David W. Roberts ,  Michael Jermyn

IPC: A61B5/1455 ,  A61B5/00 ,  A61B1/04 ,  A61B5/055 ,  A61B5/1495 ,  A61B1/06 ,  A61B1/00 ,  A61B5/1459 ,  A61B5/145

CPC classification number: A61B5/14556 ,  A61B1/00009 ,  A61B1/00165 ,  A61B1/00193 ,  A61B1/042 ,  A61B1/043 ,  A61B1/05 ,  A61B1/0646 ,  A61B1/0669 ,  A61B1/0684 ,  A61B1/07 ,  A61B1/3132 ,  A61B5/0071 ,  A61B5/0077 ,  A61B5/055 ,  A61B5/14546 ,  A61B5/14553 ,  A61B5/1459 ,  A61B5/1495 ,  A61B5/4836 ,  A61B5/7264 ,  G01J3/0229 ,  G01J3/1256 ,  G01J3/2823 ,  G01J2003/1269 ,  G01J2003/2826

Abstract: An imaging system, such as a surgical microscope, laparoscope, or endoscope or integrated with these devices, includes an illuminator providing patterned white light and/or fluorescent stimulus light. The system receives and images light hyperspectrally, in embodiments using a hyperspectral imaging array, and/or using narrowband tunable filters for passing filtered received light to an imager. Embodiments may construct a 3-D surface model from stereo images, and will estimate optical properties of the target using images taken in patterned light or using other approximations obtained from white light exposures. Hyperspectral images taken under stimulus light are displayed as fluorescent images, and corrected for optical properties of tissue to provide quantitative maps of fluorophore concentration. Spectral information from hyperspectral images is processed to provide depth of fluorophore below the tissue surface. Quantitative images of fluorescence at depth are also prepared. The images are displayed to a surgeon for use in surgery.

Abstract translation: 诸如手术显微镜，腹腔镜或内窥镜或与这些装置集成的成像系统包括提供图案化的白光和/或荧光激发光的照明器。 在使用高光谱成像阵列的实施例中，系统接收并高光图像光，并且/或使用窄带可调滤波器将滤波的接收光传递到成像器。 实施例可以从立体图像构造3-D表面模型，并且将使用在图案化光线中拍摄的图像或使用从白光曝光获得的其它近似来估计目标的光学性质。 在激发光下拍摄的高光谱图像显示为荧光图像，并对组织的光学性质进行校正，以提供荧光团浓度的定量图谱。 处理来自高光谱图像的光谱信息，以提供组织表面下方的荧光团的深度。 还准备了深度荧光的定量图像。 图像显示给外科医生用于手术。

公开(公告)号：US20130003044A1

公开(公告)日：2013-01-03

申请号：US13541171

申请日：2012-07-03

Applicant: John Maier ,  Jeffrey Cohen ,  Ryan Priore

Inventor： John Maier ,  Jeffrey Cohen ,  Ryan Priore

IPC: G01J3/28 ,  G01J3/44

CPC classification number: G01N21/84 ,  G01J3/0208 ,  G01J3/021 ,  G01J3/0224 ,  G01J3/0248 ,  G01J3/027 ,  G01J3/0291 ,  G01J3/10 ,  G01J3/1256 ,  G01J3/26 ,  G01J3/2823 ,  G01J3/44 ,  G01J3/4406 ,  G01J5/0846 ,  G01J2005/0077 ,  G01N21/35 ,  G01N21/3581 ,  G01N21/359 ,  G01N21/65 ,  G01N21/658 ,  G01N2201/129 ,  G02B21/0092 ,  G02B21/14 ,  G02B21/16

Abstract: The present disclosure provides for a system and method for assessing chronic exposure of a biological sample, such as a bodily fluid, to an analyte of interest. A biological sample may be illuminated to thereby generate a one or more pluralities of interacted photons. These interacted photons may be detected to thereby generate one or more spectroscopic data sets representative of a biological sample. Spectroscopic data sets generated may be compared to at least one reference data set. Each reference data set may be associated with a known exposure to a known analyte. The present disclosure contemplates that the system and method disclosed herein may be used to analyze exposure of biological samples to at least one analyte over time. Data sets may be obtained at various time intervals to assess changes in a molecular composition as a result of chronic exposure to an analyte.

Abstract translation: 本公开提供了用于评估生物样品（例如体液）到感兴趣分析物的慢性暴露的系统和方法。 可以照射生物样品，从而产生一个或多个相互作用的光子。 可以检测这些相互作用的光子，从而生成代表生物样品的一个或多个光谱数据集。 可以将生成的光谱数据集与至少一个参考数据集进行比较。 每个参考数据集可以与已知分析物的已知暴露相关联。 本公开内容考虑到本文公开的系统和方法可用于分析生物样品随时间的至少一种分析物的暴露。 可以以不同的时间间隔获得数据集，以评估作为慢性暴露于分析物的结果的分子组成的变化。

公开(公告)号：US20120293803A1

公开(公告)日：2012-11-22

申请号：US13472052

申请日：2012-05-15

Applicant: Yoshifumi ARAI

Inventor： Yoshifumi ARAI

IPC: G01N21/27

CPC classification number: G01J3/1256 ,  G01J3/2823 ,  G01J3/462 ,  G01J3/506 ,  G01J3/51 ,  G01J3/524

Abstract: A device measures a spectral distribution with respect to each of a plurality of color charts, sets default values to band specification data, and computes a camera output signal based on spectral sensitivity of the multiband camera and spectral feature of light from each of the plurality of charts. The device computes a candidate value of a spectral estimation parameter from the measured spectral distribution of each color chart and the computed camera output signal. The device successively varies the band specification data from the default values to make an evaluation function approach a target value, determines a spectral estimation parameter corresponding to the band specification data when the evaluation function reaches the target value. The evaluation function is defined to correlate the measured spectral distribution of each color chart to a spectral estimation value computed from the candidate value of the spectral estimation parameter and the camera output signal.

Abstract translation: 设备测量相对于多个色彩图中的每一个的光谱分布，将默认值设置为频带指定数据，并且基于多频带相机的光谱灵敏度和多频带相机中的每一个的光谱特征来计算相机输出信号 图表。 该装置根据每个颜色图表的测量光谱分布和计算出的相机输出信号计算光谱估计参数的候选值。 该装置根据默认值连续地改变频带规格数据，使评估功能达到目标值，当评估功能达到目标值时，确定与频带规格数据对应的频谱估计参数。 该评估函数被定义为将每个颜色图表的测量光谱分布与从光谱估计参数和相机输出信号的候选值计算的光谱估计值相关联。