中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

327 records (took 0.015 seconds)

    Digitisation of interferograms in fourier transform spectroscopy
    91.
    发明公开
    Digitisation of interferograms in fourier transform spectroscopy 无效
    干涉图在傅里叶变换光谱学中的数字化

    公开(公告)号：EP0836083A1

    公开(公告)日：1998-04-15

    申请号：EP96307360.6

    申请日：1996-10-09

    Applicant: PERKIN-ELMER LIMITED

    Inventor： Turner, Andrew James ,  Hoult, Robert Alan, Stable Cottage ,  Forster, Michael Dall

    IPC: G01J3/453

    CPC classification number: G01J3/453

    Abstract: Interferograms produced by a Michelson type interferometer used in Fourier Transform spectroscopy are processed by an arrangement which includes an analogue-to-digital converter (12) which is sampled by a fixed frequency clock signal to provide a digital representation of the interferogram. This signal is processed by a digital data processor (18) which also receives a digital representation of the reference fringe waveform to provide a digital output representing the interferogram. The digital representation of the reference fringe waveform may be produced by a second analogue-to-digital converter or by a timer. The analogue-to-digital converter may be arranged to produce oversampled representations of the interferogram or reference fringe waveforms. In one form of the invention the analogue-to-digital converter or converters include a delta sigma modulator.

    Abstract translation: 由傅里叶变换光谱仪中使用的迈克尔逊型干涉仪产生的干涉图通过包括模数转换器（12）的装置进行处理，所述模数转换器由固定频率时钟信号采样以提供干涉图的数字表示。 该信号由数字数据处理器（18）处理，数字数据处理器（18）还接收参考条纹波形的数字表示以提供表示干涉图的数字输出。 参考条纹波形的数字表示可以由第二模拟数字转换器或定时器产生。 模数转换器可以被布置成产生干涉图或参考条纹波形的过采样表示。 在本发明的一种形式中，模数转换器或转换器包括Δ-Σ调制器。

    OPTICAL CORRELATION GAS ANALYZER
    92.
    发明公开
    OPTICAL CORRELATION GAS ANALYZER 失效
    光学相关气体分析仪

    公开(公告)号：EP0815432A1

    公开(公告)日：1998-01-07

    申请号：EP96905635.0

    申请日：1996-03-20

    Applicant: Sci-Tec Instruments Inc.

    Inventor： IVANOV, Evgeniy, Vladimirovich

    IPC: G01J3 ,  G01N21

    CPC classification number: G01J3/453 ,  G01J3/26 ,  G01N21/3518 ,  G01N2021/451

    Abstract: An optical gas analyzer includes optical, mechanical and electronic systems. The optical system includes a collimator, a light filter, a modulated interference polarization filter (IPF), and a photo detector. The modulated IPF has two polarizers, crossed or parallel to each other, with an optical modulator and a birefringent plate mounted between them. The birefringent plate has a variable thickness which is mechanically driven and controlled by the electronic system via the electro-mechanical driver. The photo detector has its output connected to the electronic system and is placed after IPF. The gas analyzer has the advantage of allowing the minimum detectable limit of the concentration of measured gas to be decreased by greatly reducing the influence of parasitic modulation. Parasitic modulation is induced by the optical modulator into the optical and electronic units of the gas analyzer and affects the output signal. However, synchronous modulation of the modulated IPF cancels the parasitic effect in the final output, based upon the difference of two such measurements.

    Abstract translation: 光学气体分析仪包括光学，机械和电子系统。 光学系统包括准直器，滤光器，调制干涉偏振滤光器（IPF）和光检测器。 调制的IPF具有两个彼此交叉或平行的偏振器，在它们之间安装有光学调制器和双折射板。 双折射板具有可变的厚度，该厚度由电子系统通过机电驱动器机械驱动和控制。 光电检测器的输出连接到电子系统，并放置在IPF之后。 气体分析仪的优点是，通过大大降低寄生调制的影响，可以降低测量气体浓度的最小可检测极限。 由光学调制器引起的寄生调制进入气体分析仪的光学和电子单元并影响输出信号。 然而，基于两次这种测量的差异，调制IPF的同步调制消除了最终输出中的寄生效应。

    Base plate unit for fourier transform infrared spectrometers and the like
    98.
    发明公开
    Base plate unit for fourier transform infrared spectrometers and the like 失效
    GrundplattefürInfrarot-Fourier-Spektrometer und dergleichen。

    公开(公告)号：EP0596600A1

    公开(公告)日：1994-05-11

    申请号：EP93307318.1

    申请日：1993-09-16

    Applicant: NICOLET INSTRUMENT CORPORATION

    Inventor： Zerbel, Allen J.

    IPC: G01M11/04 ,  G01J3/453 ,  B23B3/12

    CPC classification number: G01J3/453 ,  G01M11/04

    Abstract: A base plate unit for infrared spectrometers and the like includes a series of lightweight components which are combined to provide great rigidity. A light weight but rigid channel core is adhered to a vibration dampening layer which, in turn, is adhered to a pan to form a sandwich with the vibration dampening layer firmly affixed between the pan and the channel core. This configuration reduces the transmission of high frequency vibrations produced by machinery or loud noise to the pan. The channel core includes walls defining internal channels, preferably hexagonal in cross-sectional shape, thus allowing the channel core to achieve very high structural rigidity with minimum weight. The pan has a substantially planar top with skirts which depend from each of its edges to provide added rigidity. A series of bores and fastener casings are embedded in the pan and the channel core to allow mounting of various optical components to the base plate unit.

    Abstract translation: 用于红外光谱仪等的基板单元包括一系列轻质组件，其被组合以提供很大的刚性。 一个重量轻但刚性的通道芯被粘附到一个减振层上，该阻尼层依次粘在一个锅上，形成一个三明治，其中防振层牢固地固定在盘和通道芯之间。 这种配置减少了由机械产生的高频振动或大噪声传播到锅底。 通道芯包括限定内部通道的壁，优选为六边形的横截面形状，从而允许通道芯以最小的重量实现非常高的结构刚性。 平底锅具有基本平坦的顶部，裙部具有从其每个边缘依赖的边缘以提供附加的刚度。 一系列孔和紧固件外壳嵌入锅和通道芯中，以允许将各种光学部件安装到基板单元。

    Interferometer and beamsplitter holder therefor
    99.
    发明公开
    Interferometer and beamsplitter holder therefor 失效
    干涉仪和dafürgeeignete Strahlenteilerhalterung。

    公开(公告)号：EP0587284A2

    公开(公告)日：1994-03-16

    申请号：EP93305558.4

    申请日：1993-07-15

    Applicant: NICOLET INSTRUMENT CORPORATION

    Inventor： Jones, George D.

    IPC: G01J3/453 ,  G02B7/182

    CPC classification number: G01J3/453 ,  G02B7/1825

    Abstract: A beamsplitter holder for an interferometer such as that used in a Fourier transform infrared spectrometer has a holder body with coplanar mounting surfaces formed about a main opening, a beamsplitter mounted against the mounting surfaces, and locating surfaces on the holder body which may be coplanar with the mounting surfaces. The holder is mounted in an interferometer housing which has positioning surfaces formed therein which are positioned to mate with the locating surfaces on the holder body. When plungers within the interferometer housing are engaged against the surface of the holder opposite the locating surfaces, the locating surfaces are pressed into contact with the coplanar positioning surfaces in the interferometer housing to precisely locate the semi-transparent surface of the beamsplitter within the interferometer with minimal distortion of the various parts. The beamsplitter and an adjacent compensator disk may be mounted in the beamsplitter holder using clips positioned around the beamsplitter and compensator which are connected together by springs which extend through holes in the body of the holder. The clips apply a controlled pressure against the surfaces of the beamsplitter and the compensator to press these elements inwardly to hold them in place in the beamsplitter holder, again with minimal distortion.

    Abstract translation: 用于傅里叶变换红外光谱仪中使用的干涉仪的分束器支架具有保持器主体，其具有围绕主开口形成的共面安装表面，安装在安装表面上的分束器和可与壳体共面的保持器主体上的定位表面 安装面。 保持器安装在具有形成在其中的定位表面的干涉仪壳体中，定位表面定位成与保持器主体上的定位表面配合。 当干涉仪壳体内的柱塞与定位表面相对的保持器表面接合时，定位表面被压接成与干涉仪壳体中的共面定位表面接触，从而精确地将干涉仪内的分束器的半透明表面定位在干涉仪内， 最小变形的各部分。 分束器和相邻的补偿盘可以使用夹在分束器和补偿器周围的夹子安装在分束器支架中，所述夹子通过弹簧连接在一起，所述弹簧延伸穿过保持器主体中的孔。 夹子对分束器和补偿器的表面施加受控的压力，以将这些元件向内按压以将它们保持在分束器支架中的适当位置，同时具有最小的变形。

    METHOD AND SYSTEM FOR PHOTODETECTOR SIGNAL CORRECTION
    100.
    发明公开
    METHOD AND SYSTEM FOR PHOTODETECTOR SIGNAL CORRECTION 失效
    方法和设备，用于校正光电探测器的信号。

    公开(公告)号：EP0583402A1

    公开(公告)日：1994-02-23

    申请号：EP92912897.0

    申请日：1992-05-07

    Applicant: ON-LINE TECHNOLOGIES, INC.

    Inventor： CARANGELO, Robert, M. ,  HAMBLEN, David, G. ,  BROUILLETTE, Carl, R.

    IPC: G01J1 ,  G01J3

    CPC classification number: G01J1/44 ,  G01J3/453

    Abstract: On applique un facteur correcteur afin de supprimer des particularités anormales du signal généré par un détecteur à photoconduction (10), et de produire un signal de sortie très linéaire, en fonction de l'énergie de radiation incidente, variable dans le temps. Le facteur correcteur peut être appliqué par l'intermédiaire d'éléments de traitement de données électroniques numériques ou de circuits analogues, ou par une combinaison de ces effets.

Patent Agency Ranking