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    Multi channel radiation analyzer
    161.
    发明授权
    Multi channel radiation analyzer 失效
    多通道辐射分析仪

    公开(公告)号：US3820898A

    公开(公告)日：1974-06-28

    申请号：US28498072

    申请日：1972-08-30

    Applicant: SSR INSTR CO

    Inventor： OLSON G

    IPC: G01J3/28 ,  G01J3/36

    CPC classification number: G01J3/2889 ,  G01J3/2823

    Abstract: An improved analyzer utilizes electron scanning techniques to examine the spectrum of radiant energy. A comparable spectrum of the background is provided, and the two are alternately scanned. The spectrum can also be ''''folded'''' into a plurality of vertically aligned segments with an adjacent area of corresponding background spectra, and a conventional t v raster scan can be employed. Appropriate processing circuits subtract the background from the signal and store the result. Stored quantities can represent the intensity of incident radiation at each wavelength.

    Spectrometers
    162.
    发明授权
    Spectrometers 失效
    光谱仪

    公开(公告)号：US3819945A

    公开(公告)日：1974-06-25

    申请号：US37299373

    申请日：1973-06-25

    Applicant: ENVIRONMENTAL DATA CORP

    Inventor： EGAN D ,  HOLSTROM G ,  PORT D ,  HOWARD R ,  LORD H ,  STEVENS R

    IPC: G01J3/28 ,  G01J3/457 ,  G01N21/33 ,  G01J3/00 ,  G01J3/36

    CPC classification number: G01N21/33 ,  G01J3/457 ,  G01J2003/2866

    Abstract: The present disclosure relates to spectrometry. A method is disclosed for detecting nitric oxide (NO) without first converting it to nitrogen dioxide (NO2) by determining the intensity of a spectral signature in the range between 2,259 and 2,269 Angstroms. Apparatus is provided which, in one form, utilizes an output shutter arrangement having a plurality of reciprocating vanes operated at mutually exclusive frequencies for passing regions of absorption radiation and continuum radiation. Circuit means is provided for distinguishing the signals derived at the various frequencies to determine the relative amount of particular material in a sample. In another form of the invention, an output chopper is provided having at least three slit apertures, the center aperture being adapted to pass only radiation at an absorptive wavelength and the two outer apertures being adapted to pass radiation in the continuum. A vane is adapted to reciprocate between a first position wherein the chopper passes only radiation through the center aperture and a second position wherein the chopper passes only radiation through the two outer apertures. The area of each of the two outer apertures is preferably one-half the area of the center aperture. A detector viewing radiation passed by the chopper will average the radiation received from the two outer apertures. In yet another aspect of the invention, a window assembly is provided so that the spectrometer may be used as a a stack monitor, the window assembly having a slidable window which may be removed for cleaning purposes.

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