Optics: measuring and testing – By dispersed light spectroscopy – With synchronized spectrum repetitive scanning
Patent
1989-04-17
1990-10-16
McGraw, Vincent P.
Optics: measuring and testing
By dispersed light spectroscopy
With synchronized spectrum repetitive scanning
250339, 356328, G01J 306, G01J 332, G01N 2135
Patent
active
049630237
ABSTRACT:
A correlational gas analyzer, comprising a light source with the light beam passed through the gas under study with a quasiperiodic pattern of the spectral band, and an optical system with sequentially positioned along the light beam condensor, input slit iris, beam dispering element and rotatably mounted output slit iris configured as a disc with a slit shaped as an Archimedes spiral. The Archimedes spiral center is coincident with the disc center and its pitch is approximately equal to the scan length of the specified spectral band of the gas under study. The output slit iris scans the specified spectral band of the gas under study across a photoreceiver, the outputs whereof drive the inputs of a first and second electric signal amplifier, with the outputs thereof connected to connected in series corrector unit and recorder. The first amplifier is a tuned amplifier with resonant frequency defined by the speed of disc rotation and by the number of maxima or minima in the specified spectral band of the gas under study.
REFERENCES:
patent: 2849618 (1958-08-01), Smith
patent: 4575243 (1986-03-01), Witte
Prikladnaya infrakrasnaya spektroskopiya, Ed. D. Kendall, Moscow, MIR Publishers 1970.
R. Haulet, C. Vavasseur, "Teledetection des pollutants gaseoux de l'atmospher", Bull. inform. sci, et techn, 1978, 230/231, p. 59.
Goldovsky Viktor L.
Stetsovich Viktor I.
Zayats Andrei J.
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