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公开(公告)号：US3267699A
公开(公告)日：1966-08-23
申请号：US30963863
申请日：1963-09-18
发明人： KNISELEY RICHARD N
IPC分类号： G01N21/72
CPC分类号： G01N21/72
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2.发明授权
公开(公告)号：US3563657A
公开(公告)日：1971-02-16
申请号：US3563657D
申请日：1968-08-09
摘要： AN ELECTRON IMAGE OF THE DISPERSED SPECTRAL LINES CHARACTERISTIC OF A CHEMICAL ELEMENT BEING ANALYZED IS PERIODICALLY SCANNED ACROSS A SLIT-LIKE APERTURE OF AN IMAGE DISSECTOR PHOTOTUBE. A GATING PULSE IS DELAYED RELATIVE TO THE START OF EACH SWEEP TO SIGNAL THE TIME WHEN THE NARROW RANGE OF INTEREST IN THE ELECTRON IMAGE IS PASSING THROUGH THE SLIT; AND THE GATING PULSE ENABLES AN AMPLIFIER RECEIV-
ING THE OUTPUT SIGNAL OF THE PHOTUBE TO SELECTIVELY AMPLIFY ONLY THIS NARROW RANGE. THE SIGNAL FROM THE GATED AMPLIFIER IS THEN FED TO AN INTEGRATOR CIRCUIT WHICH STORES THE GATED SIGNAL FOR A KNOWN NUMBER OF SWEEPS.
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