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公开(公告)号：US5114232A
公开(公告)日：1992-05-19
申请号：US635023
申请日：1990-12-28
Applicant: Fumio Tsuji , Osamu Yoshikawa
Inventor： Fumio Tsuji , Osamu Yoshikawa
CPC classification number: G01J3/4535 , G01J3/453 , G01N2021/3595
Abstract: There is disclosed an interference spectrophotometer which collects data while monitoring the position of a movable mirror by providing quadrature control to accurately perform coherent addition of data. The spectrophotometer includes a main interferometer, a control interferometer, a sliding controller controlling movement of the movable mirror, an A/D converter converting analog data obtained by the main interferometer into digital form, a register for holding data obtained by one scan of the movable mirror, a memory for accumulating data obtained by numerous scans of the movable mirror, an up/down counter receiving the output signals from two detectors included in the control interferometer, and a decision part. When the counter's value varies, the counter causes the A/D converter to perform its A/D conversion. Then, the decision part checks the counter's value after the A/D conversion. If this value differs from the count value obtained prior to the A/D conversion, the data held in the register is discarded.
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公开(公告)号：US5061854A
公开(公告)日：1991-10-29
申请号：US513536
申请日：1990-04-10
Applicant: Robert T. Kroutil , John T. Ditillo , William R. Loerop , Dennis M. Davis , Lynn D. Hoffland , Michael S. Desha
Inventor： Robert T. Kroutil , John T. Ditillo , William R. Loerop , Dennis M. Davis , Lynn D. Hoffland , Michael S. Desha
CPC classification number: G01J3/4535 , G01N2021/1793 , G01N2021/3531
Abstract: A short scan passive infrared remote sensor for detecting a target chemicalpecies, located some distance from the center burst, includes a telescope for targeting a remote gas, a beam splitter means for splitting a beam from the target gas and sending one portion along a first path to an infrared detector and sending a second portion along a second path longer than the first path to the infrared detector. The second path is variable by providing a moving mirror a first distance away from the beam splitter which is 0.5 mm farther away from the beam splitter than the fixed mirror. By this arrangement, a mirror movement of only 0.5 mm is required to obtain an equivalent of 8 cm.sup.-1 spectral information for processing with time domain digital filters. The information from the infrared detector is converted from analog to digital and fed to a digital signal processor. The resulting interferogram is then filtered by a microprocessor using a FIR linear digital filter.
Abstract translation: 一种用于检测距离中心脉冲一些距离的目标化学物质的短扫描被动红外遥感器包括用于瞄准远程气体的望远镜，用于从目标气体分离光束的分束器装置，并沿着第一 到达红外检测器的路径，并且沿着比通过红外检测器的第一路径更长的第二路径发送第二部分。 第二路径是可变的，通过提供离开分束器的第一距离的移动镜，其比固定镜远离分束器0.5mm。 通过这种布置，仅需要0.5mm的反射镜移动以获得用于使用时域数字滤波器进行处理的等效的8cm -1光谱信息。 来自红外探测器的信息从模拟转换为数字信号，并送入数字信号处理器。 然后通过使用FIR线性数字滤波器的微处理器对所得到的干涉图进行滤波。
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公开(公告)号：US4932780A
公开(公告)日：1990-06-12
申请号：US116233
申请日：1987-11-03
Applicant: Akio Izumi
Inventor： Akio Izumi
IPC: G01B9/02
CPC classification number: G01B9/02019 , G01B9/02028 , G01J3/021 , G01J3/0213 , G01J3/4535
Abstract: In an interferometer comprising a beam splitter made up of a parallel planar plate and translucent (that is, semi-reflecting) films formed on both sides thereof, and a pair of reverse reflectors disposed at predetermined distances from the two surfaces of the beam splitter, an incident beam is split into two beams by one of the translucent films, and the two beams are reflected by the reverse reflectors, thus interfering with each other at the other translucent film.
Abstract translation: 在包括由平行平面板和形成在其两侧上的半透明（即半反射））膜构成的分束器的干涉仪中，以及以与分束器的两个表面预定距离设置的一对反向反射器， 入射光束被半透明膜之一分成两束光束，两束光被反射镜反射，从而在另一半透明膜处彼此干涉。
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公开(公告)号：US4828367A
公开(公告)日：1989-05-09
申请号：US156258
申请日：1988-02-16
Applicant: Raul Curbelo , David C. Brown
Inventor： Raul Curbelo , David C. Brown
CPC classification number: G02B7/1828 , G01J3/4535
Abstract: An interferometer bearing assembly including a fixed glass rail, a movable carriage that carries both the movable interferometer mirror and the drive coil for the linear motor, and a mechanism for biasing the carriage onto the rail. The glass rail has two optically flat faces defining a normally horizontal line of intersection. The carriage is a rigid structure with plastic surface portions that provide a bearing interface for contacting the flat faces of the glass rail. To improve stability and reduce the possibility of any transverse movement, the carriage is downward biased, preferably by providing an overlying glass plate with a downwardly-facing flat surface, and mounting a spring-loaded plastic element to the top of the carriage. The plastic element contacts (and slides along) the flat glass surface and transmits a downward force to the carriage.
Abstract translation: 包括固定玻璃轨道的干涉仪轴承组件，承载用于线性电动机的可移动干涉仪反射镜和驱动线圈的可移动滑架以及用于将滑架偏置在轨道上的机构。 玻璃导轨具有两个光学平面，用于限定正常水平的交叉线。 滑架是具有塑料表面部分的刚性结构，其提供用于接触玻璃导轨的平坦表面的支承界面。 为了提高稳定性并降低任何横向移动的可能性，滑架向下偏置，优选地通过提供具有向下的平坦表面的上覆的玻璃板，并将弹簧加载的塑料元件安装到滑架的顶部。 塑料元件与扁平玻璃表面接触（并滑动）并向托架传递向下的力。
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95.发明授权
公开(公告)号：US4732482A
公开(公告)日：1988-03-22
申请号：US935412
申请日：1986-11-26
Applicant: Harald Rippel
Inventor： Harald Rippel
CPC classification number: G01J3/4535
Abstract: To reduce the data rate of a digitalized measuring signal produced in Fourier spectroscopy, the analog signal representing the interferogram is mixed with a second electrical signal whose frequency is modulated in proportion to the deviation of the instantaneous actual speed of the moving mirror of a double beam interferometer from its constant desired speed. Only the difference frequencies produced as a result of the frequency mixing are digitalized and supplied to an associated computer for analysis of the interferogram. The digital measuring signal thus obtained is distinguished by a substantially reduced data rate without giving rise to additional errors in the frequency transformation. To produce the second frequency modulated electrical signal, a laser source is used which supplies a laser beam into the interferometer parallel to the measuring beam. The interferogram of the laser beam produced in the interferometer is converted by a second optoelectrical converter into an electrical signal frequency modulated in a desired manner and is supplied to a frequency mixer.
Abstract translation: 为了降低在傅里叶谱中产生的数字化测量信号的数据速率，表示干涉图的模拟信号与第二电信号混合，第二电信号的频率与双光束的移动镜的瞬时实际速度的偏差成比例地调制 干涉仪从其恒定的所需速度。 作为频率混合产生的差分频率仅被数字化并提供给相关联的计算机以分析干涉图。 如此获得的数字测量信号通过基本上减小的数据速率来区分，而不会引起频率变换中的附加误差。 为了产生第二调频电信号，使用激光源，其将激光束提供给平行于测量光束的干涉仪。 在干涉仪中产生的激光束的干涉图被第二光电转换器转换成以期望的方式调制的电信号并被提供给混频器。
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Patent Agency Ranking
公开(公告)号：US4655587A
公开(公告)日：1987-04-07
申请号：US781185
申请日：1985-09-25
Applicant: Geert Wijntjes , Michael Hercher
Inventor： Geert Wijntjes , Michael Hercher
CPC classification number: G01J3/4535
Abstract: An improved mirror scan control for driving a movable mirror in an interferometer with a constant scan velocity comprises a closed loop servo control which provides constant velocity mirror scan in response to a phase comparison of a signal derived from the beat frequency of a two frequency laser beam passing through the interferometer and a selected frequency reference signal, wherein the difference in frequencies or beat frequency of the two frequency laser beam is stabilized at a specified difference in frequencies. The mirror scan control employs a phase lock control loop which locks the frequency of the referenced signal with the frequency of the signal derived from the laser beam to provide precise mirror velocity control.
Abstract translation: 用于以恒定扫描速度驱动干涉仪中的可移动反射镜的改进的反射镜扫描控制包括闭环伺服控制器，其响应于从两个频率激光束的拍频产生的信号的相位比较而提供恒定速度镜像扫描 通过干涉仪和选定的频率参考信号，其中两个频率激光束的频率或拍频的差异被稳定在特定的频率差。 镜像扫描控制采用锁相控制环路，其以参考信号的频率与从激光束得到的信号的频率进行锁定，以提供精确的镜像速度控制。
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公开(公告)号：US4575246A
公开(公告)日：1986-03-11
申请号：US586142
申请日：1984-03-05
Applicant: Seizi Nishizawa , Kikuo Shirawachi
Inventor： Seizi Nishizawa , Kikuo Shirawachi
CPC classification number: G01J3/4535
Abstract: A continuous drive type Michelson interferometer system for use in Fourier spectroscopy, having a main Michelson interferometer for obtaining the interferogram of a sample, an auxiliary Michelson interferometer for detecting the moving speed of a movable mirror of said main Michelson interferometer, and a control section for controlling the driving speed of said movable mirror. In said control section, the AC output signal of a photodetector is converted into a voltage corresponding to the frequency of the signal, said voltage is compared with a preset voltage by a voltage difference detection means, the phase of said AC output of said photodetector is compared with a phase of a reference signal by a phase comparison means, and said driving speed is controlled by both the outputs of said voltage difference detection means and said phase comparison means.
Abstract translation: 一种用于傅里叶谱的连续驱动型迈克尔逊干涉仪系统，具有用于获得样品干涉图的主迈克尔逊干涉仪，用于检测所述主迈克尔逊干涉仪的可移动反射镜的移动速度的辅助迈克尔逊干涉仪，以及用于 控制所述可移动镜的驱动速度。 在所述控制部分中，光电检测器的交流输出信号被转换为与信号频率相对应的电压，所述电压通过电压差检测装置与预设电压进行比较，所述光电检测器的所述交流输出的相位为 与相位比较装置的参考信号的相位相比，并且所述驱动速度由所述电压差检测装置和所述相位比较装置的输出两者来控制。
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公开(公告)号：US4556316A
公开(公告)日：1985-12-03
申请号：US470936
申请日：1983-03-01
Applicant: Walter M. Doyle
Inventor： Walter M. Doyle
CPC classification number: G01J3/4535
Abstract: A spectrometer is disclosed having an interferometer in which: (a) the variable-length arm has a moving retroreflector (copy A to A in summary). The pivoted linkage comprises three or more arms each having its upper end pivotally connected to a supporting structure and its lower end pivotally connected to a carrier for the retroreflector. The stationary folding mirror blocks approximately half of the open face of the retroreflector, causing the radiation which enters the unblocked half of the retroreflector to be reflected back to the retroreflector after it has traveled diagonally across the retroreflector and then been reflected toward the folding mirror.
Abstract translation: 公开了一种具有干涉仪的光谱仪，其中：（a）可变长度臂具有移动后向反射器（总之，A到A）。 枢转联动装置包括三个或更多个臂，每个臂的上端可枢转地连接到支撑结构，并且其下端枢转地连接到用于后向反射器的载体。 固定的折叠镜阻挡后向反射器的开放面的大约一半，使得进入后向反射器的未阻挡的一半的辐射在其沿对角线穿过后向反射器行进后被反射回到后向反射器，然后被反射到折叠反射镜。
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公开(公告)号：USRE31941E
公开(公告)日：1985-07-09
申请号：US812590
申请日：1977-07-05
Applicant: Gerald L. Auth
Inventor： Gerald L. Auth
CPC classification number: G02B7/1827 , G01J3/4535
Abstract: An interferometer for analyzing electromagnetic frequency spectra including a movable mirror supported on two air bearings such that the center of support of the bearings continuously coincides with the center of gravity of the movable mirror during the motion of the mirror. The air bearings engage two parallel, spaced apart lateral rods that maintain the optical alignment of the mirror. To facilitate making spectral measurements, the interferometer also incorporates a laser for producing monochromatic light that is directed through a primary beam splitter to provide a periodic fringe pattern as the mirror moves and a white light directed through a secondary beam splitter to provide a reproducible reference point.
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公开(公告)号：US3809481A
公开(公告)日：1974-05-07
申请号：US31123472
申请日：1972-12-01
Applicant: NASA
Inventor： SCHINDLER R
CPC classification number: G01J3/4535
Abstract: In a Fourier interference spectrometer of the double-pass retroreflector type, a single mirror is employed in the path of both split beams of an incoming ray to cause them to double back through separate retroreflectors. Changes in optical path length are achieved by linear displacement of both retroreflectors using a motor driven lead screw on one for large, low-frequency changes, a moving-coil actuator on the other for smaller, midfrequency changes and a piezoelectric actuator on one of these two for small, high-frequency changes.
Abstract translation: 在双通后向反射器类型的傅里叶干涉光谱仪中，在入射光束的两个分束的路径中采用单个反射镜，以使它们通过单独的后向反射器双向反射。 光路长度的变化通过两个回射器的线性位移来实现，该反射器使用马达驱动的导螺杆，用于大的，低频率的变化，另一个用于较小的中频变化的动圈式致动器和一个压电致动器 这两个为小，高频率的变化。
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