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    Scanning optical spectral analyzer employing plural detectors
    161.
    发明授权
    Scanning optical spectral analyzer employing plural detectors 失效
    采用多个检测器的扫描光谱分析仪

    公开(公告)号：US3992101A

    公开(公告)日：1976-11-16

    申请号：US540531

    申请日：1975-01-13

    Applicant: James C. Dapper ,  Paul A. Niemi

    Inventor： James C. Dapper ,  Paul A. Niemi

    IPC: F41G7/30 ,  G01J3/00 ,  G01J3/14 ,  G01J3/36 ,  G01S3/789 ,  G02B26/12 ,  G01J3/30

    CPC classification number: G01J3/14 ,  F41G7/303 ,  G01J3/02 ,  G01J3/021 ,  G01J3/0235 ,  G01J3/36 ,  G01S3/789 ,  G02B26/12 ,  G01J2003/1213

    Abstract: A scanner having an instantaneous narrow field of view determines spectral and positional information of a point source of optical radiation in a relatively wide field of view. A first optical path includes the scanning means, a dispersion means, and a first detector means so that different wavelengths of the source are convoluted to impinge on the first detector means at different times during a scan of the field of view. A second optical path includes the scanning means, the second detector means, and a narrow bandpass filter for enabling approximately monochromatic energy of the source to impinge on a second detector means displaced from the first detector means. Thereby, a predetermined wavelength is imaged on the second detector means at a time during a scan that differs from the time when that wavelength is imaged on the first detector means, even though the source angular position in the field of view is substantially the same for both of the optical paths. To enable the system to be responsive only to point sources, to the exclusion of nonpoint sources, each of the first and second detector means is divided into a multiplicity of separate, spaced detector elements. Each of the detector elements has a length in the direction of scan no greater than the length of the point source imaged on the first and second detector means. In response to the amplitude of energy impinging on the elements of the second detector means, a signal replica of the convoluted spectral energy impinging on one of the elements of the first detector means is coupled to a signal processing network that recognizes point sources having a predetermined spectral signature and enables the position of the recognized sources to be determined.

    Abstract translation: 具有瞬时窄视场的扫描仪在相对宽的视场中确定光辐射的点光源的光谱和位置信息。 第一光路包括扫描装置，分散装置和第一检测器装置，使得在视场的扫描期间的不同时间，源的不同波长被卷积以撞击在第一检测器装置上。 第二光路包括扫描装置，第二检测器装置和窄带通滤光器，用于使源的大致单色能量撞击从第一检测器装置移位的第二检测器装置。 因此，即使在视场中的源角位置基本相同的扫描期间，第二检测器装置上的预定波长成像在与第一检测器装置上的波长成像时间不同的时间， 两个光路。 为了使系统仅响应于点源，排除非点源，第一和第二检测器装置中的每一个被分成多个分开的间隔的检测器元件。 每个检测器元件具有不大于在第一和第二检测器装置上成像的点源的长度的扫描方向上的长度。 响应于冲击第二检测器装置的元件的能量的幅度，入射在第一检测器装置的元件之一上的卷积频谱能量的信号副本耦合到信号处理网络，该信号处理网络识别具有预定 光谱签名，并确定识别的源的位置。

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