Optical sensing arrangements

Details Optical sensing arrangements Optical sensing arrangements

1989-02-10

1990-07-17

Willis, Davis L.

Optics: measuring and testing

By particle light scattering

With photocell detection

356352, G01J 326, G01B 902

Patent

active

049417479

ABSTRACT:
An optical scanning arrangement for gas sensing, in which scanned light source means produces a spectrum of regularly spaced wavelengths or lines which correspond as regards spacing to the absorption line spectrum of a gas to be monitored and in which the multi-line output from the light source means propagates through a region to be sensed for gas and means for determining the light output from the region for detecting the attenuation of the components of the multi-line output from the light source means due to absorption by said gas being monitored.

REFERENCES:
patent: 4730112 (1988-03-01), Wong

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