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    Spectrometer with direct drive high speed oscillating grating
    2.
    发明公开
    Spectrometer with direct drive high speed oscillating grating 失效
    Spektrometer mit einem direkt angetriebenen mit hoher Geschwindigkeit oszillierenden Raster。

    公开(公告)号：EP0378108A2

    公开(公告)日：1990-07-18

    申请号：EP90100152.9

    申请日：1990-01-04

    Applicant: NIRSYSTEMS INCORPORATED

    Inventor： McGee, Philip A.

    IPC: G01J3/06 ,  H02P7/00

    CPC classification number: G01J3/06 ,  G01J3/18 ,  G01J2003/062 ,  G01J2003/1213 ,  G01J2003/1273 ,  H02P7/04

    Abstract: An optical grating is oscillated at a high rate to scan a narrow wavelength band of light through the spectrum dispersed by the grating. The grating is connected integrally with the rotor of a motor, which is energized to oscillate its rotor between selected limits. The direction of rotation of the motor is controlled by an H drive circuit connected to a coil of the motor. The speed of the motor is controlled by a pulse train applied to the motor coil through the H drive. The pulse train has a duty cycle varying inversely with the motor speed. The duty cycle of the pulse train is controlled by a counter which is connected to count high frequency pulses and which is reset each time the grating rotates through an angular increment. The limits of the oscillation of the grating and the rate of rotation of the grating between the limits are selectively variable. Output readings from the spectrophotometer are taken at equal angular increments of the grating and these readings are converted to values occurring at equal wavelength increments by a computer.

    Abstract translation: 光栅以高速率振荡，以通过由光栅分散的光谱扫描窄的波长带的光。 光栅与电动机的转子一体地连接，该电动机被激励以使其转子在选定的极限之间振荡。 马达的旋转方向由连接到马达的线圈的H驱动电路控制。 电机的速度由通过H驱动器施加到电机线圈的脉冲串控制。 脉冲串具有与电机速度成反比变化的占空比。 脉冲串的占空比由连接计数高频脉冲的计数器控制，每当光栅旋转角度增量时，该计数器被复位。 光栅的振荡极限和光栅在极限之间的旋转速率是有选择性的。 来自分光光度计的输出读数以光栅的相等的角度增量进行，这些读数被转换成计算机以相等波长增量出现的值。

    Spectrophotometric instrument with rapid scanning distortion correction
    5.
    发明公开
    Spectrophotometric instrument with rapid scanning distortion correction 失效
    Spektrophotometer mit Fehlerkorrektur durch schnelle Abtastung。

    公开(公告)号：EP0420135A1

    公开(公告)日：1991-04-03

    申请号：EP90118365.7

    申请日：1990-09-25

    Applicant: NIRSYSTEMS INCORPORATED

    Inventor： Norris, Carl

    IPC: G01J3/06 ,  G01J3/28

    CPC classification number: G01J3/2889 ,  G01J3/433 ,  G01J2003/2866 ,  G01J2003/2876 ,  G01N21/4738

    Abstract: In a spectrophotometric instrument, a system is provided to correct for distortion caused by rapid scanning of the spectrum. In the instrument, photodetectors (19) detect light energy which is scanned through a spectrum at a rapid rate. An amplifier (20) amplifies the output signal generated by the photodetectors (19). The output signal of the amplifier (20) is sampled at increments and the samples are converted to digital values. A first derivative is determined from the digital values by subtracting from each value the value from the preceding increment. The first derivative values are multiplied times a constant selected to correct for the distortion and the resulting product values are added to the amplitude digital values to provide a set of corrected values representing the intensity detected by the photo­detectors.

    Abstract translation: 在分光光度计中，提供了一种系统来校正由于光谱的快速扫描引起的失真。 在仪器中，光电检测器（19）检测以快速扫描频谱的光能。 放大器（20）放大由光检测器（19）产生的输出信号。 放大器（20）的输出信号以增量取样，样本被转换为数字值。 通过从每个值减去前一增量的值，从数字值确定一阶导数。 一阶导数值乘以选定的常数以校正失真，并将所得到的乘积值加到幅度数字值上，以提供一组校正值，这些校正值表示由光电检测器检测到的强度。

    Fiber optic probe with truncated cone window block for infrared spectral analysis instrument
    6.
    发明公开
    Fiber optic probe with truncated cone window block for infrared spectral analysis instrument 失效
    光纤传感器具有截头圆锥形的窗部，用于IR光谱分析的工具。

    公开(公告)号：EP0652429A3

    公开(公告)日：1997-01-22

    申请号：EP94117258.7

    申请日：1994-11-02

    Applicant: NIRSYSTEMS INCORPORATED

    Inventor： Von Bargen, Kenneth P.

    IPC: G01N21/47

    CPC classification number: G01N21/474

    Abstract: In a fiber optic probe for an infrared analysis instrument, a window block (37) made of sapphire is provided having an inner face (4) in the shape of a truncated cone. A fiber optic cable has its distal end adjacent to the inner face of the window block and the optic fibers in the distal end are segregated into transmitting fibers (13) adjacent to said conical section of the inner face of the window block and receiving fibers (17) abutting the central circular portion formed by the truncated cone shape of the inner face. A cylindrical separator (47) separates the receiving and transmitting fibers at the distal end of the fiber optic cable.

    An improved system for measuring the moisture content of powder and fiber optic probe therefor
    7.
    发明公开
    An improved system for measuring the moisture content of powder and fiber optic probe therefor 失效
    改进的系统，用于测量粉末的水分并为其光纤探针。

    公开(公告)号：EP0585691A1

    公开(公告)日：1994-03-09

    申请号：EP93112984.5

    申请日：1993-08-13

    Applicant: NIRSYSTEMS INCORPORATED

    Inventor： DeThomas, Frank A. ,  VonBargen, Kenneth P.

    IPC: G01N21/85 ,  G01N33/04 ,  B01J8/18 ,  G01N21/47

    CPC classification number: F26B25/22 ,  G01N21/3554 ,  G01N21/359

    Abstract: In a system for measuring moisture content of powder, such as powdered milk while the powder is being dried, the powder is contained in a fluidized bed and a fiber optic probe is inserted through the wall of the container of said bed to be immersed in the fluidized bed. The fluidized bed continuously scrubs the outer surface of the probe window and prevents it from being coated with the powder. Near infrared light is transmitted through a cable optic fiber and said probe to irradiate the powder in said fluidized bed and is reflected back from the powder into said probe and transmitted by said fiber optic cable to a spectroscopic analyzing instrument. The fiber optic probe includes a sapphire rod having a back surface abutting the end of the fiber optic cable and an angled front surface. The front of the probe is closed by a quartz window spaced from the angled front surface of the sapphire rod and held in position by an inwardly directed flange on the outer tubular casing of the fiber optic probe. The front window is provided with an outwardly directed flange and an O-ring is sandwiched between the flange on the window and the inwardly directed flange on the distal end of the probe to provide a seal to prevent powder from getting in the probe.

    Abstract translation: 在用于测量粉末，颜色的水分含量的系统：如奶粉在正在干燥的粉末，所述粉末包含在流化床和光纤探针通过所述床的容器的壁插入到将被浸没在 流化床。 流化床连续擦洗采样窗口的外表面，并从被涂覆有粉末，防止它。 近红外光为反式mitted通过电缆光纤和所述探针以照射在所述流化床的粉末和反射从所述粉末到所述样品和反式通过所述纤维光缆mitted到一个光谱分析仪回来。 光纤光探头包括具有背表面邻接所述光缆和倾斜的前表面的端部的蓝宝石杆。 样品的前面由从蓝宝石杆的倾斜的前表面在向内指向的凸缘上的光纤的外管状外壳隔开并保持在适当位置通过试用石英窗关闭。 设置有在向外定向的凸缘和O-环的探针上的前窗窗口上的凸缘和向内指向的凸缘之间夹在探针的远端到提供一个密封，以防止粉末从获得。

    Fiber optic probe with truncated cone window block for infrared spectral analysis instrument
    8.
    发明公开
    Fiber optic probe with truncated cone window block for infrared spectral analysis instrument 失效
    FiberoptischerMessfühlermit einemkegelstumpfförmigenFensterteilfürein Instrument zur IR-Spektralanalyse。

    公开(公告)号：EP0652429A2

    公开(公告)日：1995-05-10

    申请号：EP94117258.7

    申请日：1994-11-02

    Applicant: NIRSYSTEMS INCORPORATED

    Inventor： Von Bargen, Kenneth P.

    IPC: G01N21/47

    CPC classification number: G01N21/474

    Abstract: In a fiber optic probe for an infrared analysis instrument, a window block (37) made of sapphire is provided having an inner face (4) in the shape of a truncated cone. A fiber optic cable has its distal end adjacent to the inner face of the window block and the optic fibers in the distal end are segregated into transmitting fibers (13) adjacent to said conical section of the inner face of the window block and receiving fibers (17) abutting the central circular portion formed by the truncated cone shape of the inner face. A cylindrical separator (47) separates the receiving and transmitting fibers at the distal end of the fiber optic cable.

    Abstract translation: 在用于红外分析仪的光纤探针中，提供了由蓝宝石制成的窗框，其具有呈锥形的内表面。 光纤电缆的远端与窗框的内表面相邻，远端的光纤分隔成与窗框的内表面的所述圆锥形部分相邻的传输光纤，并接收与中心圆形接触的光纤 由内表面的截头圆锥形形成的部分。 圆柱形分离器将光纤电缆的远端处的接收和发射光纤分开。

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