Optics: measuring and testing – By dispersed light spectroscopy – With synchronized spectrum repetitive scanning
Patent
1989-04-17
1990-10-23
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
049647253
ABSTRACT:
The correlational gas analyzer comprises a light source passed through the gas under study, which features a quasiperiodic pattern of the specified spectral band, and an optical system with sequentially positioned along the optical path condensor, input slit iris, dispersing means to decomposed the specified spectral band of the gas under study, and rotatably mounted output slit iris configures as a disc with a plurality of slits, uniformly distributed along its circumference and equidistant from the disc center. The spacing between the centers of adjacent slits 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 output signal whereof drives two electric signal amplifiers. One of the amplifiers is designed as a tuned amplifier, with the resonant frequency thereof defined by a preset relation between the disc rotation speed, the number of maxima or minima in the specified spectral band, and the number of slits in the disc.
REFERENCES:
patent: 2849618 (1958-08-01), Smith
patent: 3700331 (1972-10-01), White
Prikladnaya infrakrasnaya spektroskipiya Ed. D. Kendall, Moscos, MIR Publishers 1970.
R. Haulet, C. Vasseur "Teledetection des pollutants gaseoux de l'atmospher" Bull, inform. sci, et techn, 19/8, 230/231 p. 59.
Goldovsky Viktor L.
Stetsovich Viktor I.
Zayats Andrei J.
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