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    Optical spectrum analyzer and optical spectrum detecting method
    91.
    发明申请
    Optical spectrum analyzer and optical spectrum detecting method 有权
    光谱分析仪和光谱检测方法

    公开(公告)号：US20020131042A1

    公开(公告)日：2002-09-19

    申请号：US09938483

    申请日：2001-08-27

    Applicant: FUJITSU LIMITED

    Inventor： Takeo Iwama

    IPC: G01J003/28

    CPC classification number: G01J9/0246 ,  G01J3/1256 ,  G01J3/2803

    Abstract: In an optical spectrum analyzer comprising a spectrograph and a photodevice array, and an optical spectrum detecting method, a wavelength deviation, from an assigned wavelength, of a light detected by a photodevice array which detects a wavelength of a diffraction light or a non-diffraction light from an acoustooptic device, is detected and a feedback control to a diffraction angle of the acoustooptic device is performed. Also, without using a feedback control, an exit light and a diffraction light from the acoustooptic device are respectively received by two photodevice arrays and the photodevices are arranged in order to mutually compensate gaps between the photodevices, whereby a center of each photodevice is similarly made coincide with a peak of an optical beam to be received.

    Abstract translation: 在包括光谱仪和光器件阵列以及光谱检测方法的光谱分析仪中，从检测衍射光的波长的光器件阵列检测到的光的波长偏差，或非衍射 检测来自声光装置的光，并执行对声光装置的衍射角的反馈控制。 此外，不使用反馈控制，来自声光装置的出射光和衍射光分别由两个光器件阵列接收，并且设置光器件以相互补偿光器件之间的间隙，由此类似地制造每个光器件的中心 与要接收的光束的峰值一致。

    Spectrometric method and apparatus for spectrometry
    94.
    发明授权
    Spectrometric method and apparatus for spectrometry 失效
    光谱测定法和仪器

    公开(公告)号：US5946090A

    公开(公告)日：1999-08-31

    申请号：US974680

    申请日：1997-11-19

    Applicant: Hideo Tashiro ,  Satoshi Wada ,  Kazuyuki Akagawa

    Inventor： Hideo Tashiro ,  Satoshi Wada ,  Kazuyuki Akagawa

    IPC: G01J3/10 ,  G01J3/12 ,  G01J3/28 ,  G01J3/44

    CPC classification number: G01J3/28 ,  G01J3/10 ,  G01J3/1256 ,  G01J3/44

    Abstract: A spectrometric method is disclosed which uses a novel tunable laser as a monochromatic light source to carrying out spectrometry efficiently. As the tunable laser, a tunable laser is used which comprises a laser resonator so provided therein with a laser medium 14 capable of laser oscillation in a predetermined range of wavelength and a birefringent acousto-optic element 100 and which is capable of wavelength selection by selecting a frequency of an acoustic wave to be generated in the birefringent acousto-optic element 100 by means of a piezoelectric element 22 connected to a RF power source 20. The tunable laser is used instead of a spectroscopic light source and a monochromator in a conventional spectrophotometer to thereby carry out spectrometry efficiently. In case of detecting Raman scattered light no influence of fluorescence without using a spectroscope, a tunable laser 140 is controlled by a controlling device 141 to sweep a wavelength of a monochromatic light beam LB with which a sample S is irradiated while alternately switching the wavelength between a first frequency .upsilon..sub.ex1 and a second frequency .upsilon..sub.ex2 having a frequency difference .DELTA..upsilon..sub.ex relative to the first frequency .upsilon..sub.ex1. The resulting scattered light emanated from the sample S is detected by a photodetector 145 through an interference filter 144 which transmits light having an obsrvation frequency .upsilon..sub.ob. Output of the photodetector 145 is subjected to phase synchronous detection by a lock-in amplifier 146 and processed by a signal processor 147 to obtain a Raman spectrum ot the sample S.

    Abstract translation: 公开了一种使用新型可调激光器作为单色光源进行光谱测定的光谱测定方法。 作为可调谐激光器，使用可调激光器，其包括激光谐振器，其中设置有能够在预定波长范围内激光振荡的激光介质14和双折射声光元件100，并且能够通过选择波长选择 通过连接到RF电源20的压电元件22在双折射声光元件100中产生的声波的频率。在常规分光光度计中使用可调谐激光器代替分光光源和单色仪 从而有效地进行光谱测定。 在不使用分光镜的情况下检测到拉曼散射光不影响荧光，可调谐激光器140由控制装置141控制，以扫描照射样品S的单色光束LB的波长，同时交替地切换 具有相对于第一次上升频率ex1的频率差DELTA上升的第一频率上升ex1和第二频率上限2。 从样品S发出的所得到的散射光由光电检测器145通过干涉滤光片144检测，该干涉滤光片144透射具有观察频率上限的光。 光检测器145的输出由锁定放大器146进行相位同步检测，并由信号处理器147进行处理以获得样品S上的拉曼光谱。

    Dual beam tunable spectrometer
    95.
    发明授权
    Dual beam tunable spectrometer 失效
    双光束可调光谱仪

    公开(公告)号：US5477321A

    公开(公告)日：1995-12-19

    申请号：US298613

    申请日：1994-08-31

    Applicant: Rick J. Johnson

    Inventor： Rick J. Johnson

    IPC: G01J3/08 ,  G01J3/12 ,  G01J3/42 ,  G01N21/27 ,  G01N21/31

    CPC classification number: G01J3/1256 ,  G01J3/08 ,  G01J3/42

    Abstract: A dual beam tunable spectrometer comprises a radiation source, generating means, a detector, and a shutter arrangement. The radiation source generates an incident radiative beam. The generating means, which includes an acousto-optic tunable filter, receives the incident radiative beam and generates therefrom a reference beam and a sample beam. The detector detects at least part of the reference beam, and detects at least part of the sample beam emitted from a sample following illumination of the sample with the sample beam. The shutter arrangement includes a first shutter selectively permitting passage therethrough of the part of the reference beam and a second shutter selectively permitting passage therethrough of the part of the sample beam. The shutter arrangement opens the first shutter and closes the second shutter to permit the detector to detect only the part of the reference beam. Similarly, the shutter arrangement closes the first shutter and opens the second shutter to permit the detector to detect only the part of the sample beam.

    Abstract translation: 双光束可调光谱仪包括辐射源，发生装置，检测器和快门装置。 辐射源产生入射辐射束。 包括声光可调谐滤波器的发生装置接收入射的辐射束并由其产生参考光束和样本光束。 检测器检测参考光束的至少一部分，并且在用样品光束照射样品之后检测从样品发射的样品光束的至少一部分。 快门装置包括：第一快门，其选择性地允许通过其中参考光束的部分;以及第二快门，其选择性地允许通过其中的部分样本光束。 快门装置打开第一快门并且关闭第二快门以允许检测器仅检测参考光束的一部分。 类似地，快门装置关闭第一快门并打开第二快门以允许检测器仅检测样本波束的一部分。

    Solid-state laser Fourier-Transform Raman Spectrometer
    97.
    发明授权
    Solid-state laser Fourier-Transform Raman Spectrometer 失效
    固态激光傅里叶变换拉曼光谱仪

    公开(公告)号：US5351121A

    公开(公告)日：1994-09-27

    申请号：US9454

    申请日：1993-01-27

    Applicant: Thomas M. Baer ,  Kelly A. Cox ,  Phillip Gooding ,  John Cole ,  David F. Head ,  Gregory J. Kintz

    Inventor： Thomas M. Baer ,  Kelly A. Cox ,  Phillip Gooding ,  John Cole ,  David F. Head ,  Gregory J. Kintz

    IPC: G01J3/12 ,  G01J3/44 ,  G01J3/453 ,  H01S3/082 ,  H01S3/094 ,  H01S3/16 ,  G01N21/65

    CPC classification number: H01S3/082 ,  G01J3/44 ,  G01J3/1256 ,  G01J3/453 ,  G01N2201/06113 ,  H01S3/094038 ,  H01S3/1673

    Abstract: A Fourier Transform Raman Spectrometer system includes a folded V laser cavity. A first leg of the folded V laser cavity is defined by a highly reflective end mirror and a dichroic fold mirror and a second leg of the folded V laser cavity is defined by the fold mirror and an output coupler. A solid-state laser gain medium is disposed in the first leg of the folded V laser cavity and is pumped by a pump source aligned with the optical path of the first leg of the laser cavity and radiating through the fold mirror. The fold mirror is highly transmissive at the wavelength of pump radiation from the pump source and highly reflective at the laser output wavelength. An output beam from the laser is passed through a tuneable filter comprising an acousto-optic device and is directed at a sample to be analyzed. Light reflected from the sample is directed to a Raman Spectrometer for analysis.

    Abstract translation: 傅里叶变换拉曼光谱仪系统包括折叠的V激光腔。 折叠的V激光腔的第一段由高反射端镜和二向色折射镜限定，折叠的V激光腔的第二支腿由折叠镜和输出耦合器限定。 固态激光增益介质设置在折叠的V激光腔的第一支腿中，并且通过与激光腔的第一支腿的光路对齐并且通过折叠镜辐射的泵浦源来泵浦。 折射镜在来自泵浦源的泵浦辐射的波长处是高度透射的，并且在激光输出波长处具有高反射性。 来自激光器的输出光束通过包括声光器件的可调谐滤光器，并且被引导到待分析的样品。 从样品反射的光被引导到拉曼光谱仪进行分析。

    Real-time imaging spectrometer
    98.
    发明授权
    Real-time imaging spectrometer 失效
    实时成像光谱仪

    公开(公告)号：US5216484A

    公开(公告)日：1993-06-01

    申请号：US805341

    申请日：1991-12-09

    Applicant: Tien-Hsin Chao ,  Li-Jen Cheng Cheng ,  Jeffrey W. Yu ,  James L. Lambert

    Inventor： Tien-Hsin Chao ,  Li-Jen Cheng Cheng ,  Jeffrey W. Yu ,  James L. Lambert

    IPC: G01J3/12 ,  G01J3/28 ,  G01N21/35

    CPC classification number: G01J3/1256 ,  G01J3/2823 ,  G01N21/35 ,  G01N21/3563 ,  G01N21/359

    Abstract: An improved AOTF-based imaging spectrometer that has ability to electronically set the bandpass wavelength of an AOTF to any desired value in its wide tuning range, provides significant observational flexibility. This allows observations to be tailored in real-time and enables the spectrometer to address a wide range of objectives and permits real-time modification of the observational parameters, such as in flight or in other situations in which only remote control is possible. Various improvements in optical architecture provide simplified magnification variability, improved image resolution and light throughput efficiency and reduced sensitivity to ambient light. A preferred embodiment employs a camera zoom lens as the input lens. A TeO.sub.2 AOTF and a relay lens are placed at selected distances behind the back focal plane of the input lens, respectively. A charge coupled device (CCD) camera, which comprises a camera, camera zoom lens and a CCD detector is placed at a selected distance behind the relay lens. An RF signal generator is used to drive the AOTF. Two embodiments of the invention are disclosed herein. One operates in the visible/near-infrared domain, in the wavelength range of 0.48 to 0.76 microns. The other operates in the infrared wavelength range of 1.2 to 2.5 microns.

    Abstract translation: 一种改进的基于AOTF的成像光谱仪具有将AOTF的带通波长电子设置为其宽调谐范围内任何所需值的能力，提供了显着的观察灵活性。 这样可以实时观察观察结果，并使光谱仪能够处理各种各样的目标，并允许观察参数的实时修改，例如飞行中或只能进行遥控的其他情况。 光学架构的各种改进提供了简化的放大变化，提高了图像分辨率和光通量效率，降低了对环境光的敏感性。 优选实施例采用相机变焦镜头作为输入透镜。 TeO2 AOTF和中继透镜分别放置在输入透镜的后焦平面后面的选定距离处。 将相机，相机变焦镜头和CCD检测器的电荷耦合器件（CCD）照相机放置在中继透镜后面选定的距离处。 使用RF信号发生器来驱动AOTF。 本文公开了本发明的两个实施例。 一个在0.48到0.76微米的波长范围内在可见光/近红外区域工作。 另一个工作在1.2到2.5微米的红外波长范围内。

    Gas spectrometer construction having an improved alignment feature
    99.
    发明授权
    Gas spectrometer construction having an improved alignment feature 失效
    气体光谱仪结构具有改进的对准特征

    公开(公告)号：US4787750A

    公开(公告)日：1988-11-29

    申请号：US35835

    申请日：1987-04-08

    Applicant: Robert L. Nelson ,  William H. McIntyre ,  William J. Danley

    Inventor： Robert L. Nelson ,  William H. McIntyre ,  William J. Danley

    IPC: G01J3/12 ,  G01N21/15 ,  G01N21/35 ,  G01N21/53 ,  G01N21/31

    CPC classification number: G01N21/3504 ,  G01J3/1256 ,  G01N2021/151 ,  G01N2021/536

    Abstract: An across-the-stack gas analyzing spectrometer has a radiation source assembly including a cylindrical tube 22 having, in succession from its outer end toward the stack end a radiation emission assembly 28, a first lens assembly 30, and an AOTF assembly, all in optically aligned arrangement because of the circular perimeter of the elements in the circular tube, the arrangement also including a projecting second lens nozzle 98 received in an air window assembly 104 which forms a venturi with the second lens, the air window having a ball joint arrangement 120 for easy alignment of the directed beam, and also including a small diameter air window tube 142 through which clean air is directed into the stack through a larger diameter stack opening.

    Abstract translation: 跨堆叠气体分析光谱仪具有辐射源组件，该辐射源组件包括圆柱形管22，圆柱形管22从其外端朝向堆叠端部依次具有辐射发射组件28，第一透镜组件30和AOTF组件，全部在 由于圆形管中的元件的圆形周长，光学对准的布置，该布置还包括容纳在与第二透镜形成文丘里管的空气窗组件104中的突出的第二透镜喷嘴98，空气窗具有球接头布置 120，用于易于对准定向梁，并且还包括小直径的空气窗管142，清洁空气通过该小直径空气窗管通过较大直径的堆叠开口引导到堆叠中。

    System for chemical analysis
    100.
    发明授权
    System for chemical analysis 失效
    化学分析系统

    公开(公告)号：US4771629A

    公开(公告)日：1988-09-20

    申请号：US24297

    申请日：1987-03-10

    Applicant: Gerald L. Carlson ,  Frederick M. Ryan

    Inventor： Gerald L. Carlson ,  Frederick M. Ryan

    IPC: G01N21/35 ,  G01J3/12 ,  G01J3/28 ,  G01J3/42 ,  G01N29/02 ,  G01N31/08

    CPC classification number: G01J3/42 ,  G01J2003/2866 ,  G01J3/1256 ,  G01J3/2803 ,  G01N21/35 ,  G01N21/3504 ,  G01N21/3577 ,  G01N2201/08

    Abstract: An improved system for quantitative chemical analysis incorporates a chromatographic column. A radiation source of a predetermined range of wavelengths is in optical communication with an emerging specie from the chromatographic column by of a first optical path whereby radiation is modified by characteristic of the specie. A detector is in optical communication with the emerging specie by a second optical path whereby a first output signal reflective of the detected radiation is generated. An acousto-optic tunable filter system is disposed in one of either the first or second optical paths. The radiation is passed through the crystal at a predetermined angle relative to the crystal's optic axis. An acoustic transducer is coupled to the crystal to launch acoustic waves into the crystal to interact with a selected narrow bandwidth portion of the radiation to make it distinguishable from the remaining radiation. A computer to which the detector output signal is applied determines the emerging specie by the identifiable characteristics. An auxiliary detector responsive to the emerging specie can be associated with the chromatographic column. A parallel optical path can also be included to define a reference cell. A second output signal reflective of the detected radiation passing through the parallel optical path is generated. The difference between the first and second output signals represents a measure of the emerging specie's absorption characteristic. In an alternative embodiment, an acoustooptic dispersive light filter can be inserted in the system.

    Abstract translation: 改进的定量化学分析系统包含色谱柱。 预定波长范围的辐射源通过第一光路与来自色谱柱的出现物质光学通信，由此通过特征的特征改变辐射。 检测器通过第二光路与新出现的物体进行光通信，由此产生反映检测到的辐射的第一输出信号。 声光可调滤波器系统设置在第一或第二光路之一中。 相对于晶体的光轴，辐射以预定的角度通过晶体。 声换能器耦合到晶体以将声波发射到晶体中以与所选辐射的窄带宽部分相互作用，使其与剩余辐射区分开。 应用检测器输出信号的计算机通过可识别的特性确定新出现的特征。 响应于出现的物种的辅助检测器可以与色谱柱相关联。 还可以包括并行光路以限定参考单元。 产生反映通过并行光路的检测到的辐射的第二输出信号。 第一和第二输出信号之间的差异表示出现的物种的吸收特性的量度。 在替代实施例中，可以在系统中插入声光色散光滤光器。

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