Method of and apparatus for monitoring gaseous pollutants

Details Method of and apparatus for monitoring gaseous pollutants Method of and apparatus for monitoring gaseous pollutants

1982-03-02

1985-07-16

Evans, F. L.

Optics: measuring and testing

By shade or color

With sample responsive to plural colors applied simultaneously

356 51, 356437, 250338, 250339, G01N 2135

Patent

active

045293171

ABSTRACT:
Laser scanning apparatus for monitoring gaseous pollutants uses two intersecting scanning beams so that the point of intersection (which is monitored by both scanning beams) can be identified by triangulation.

REFERENCES:
patent: 3766380 (1973-10-01), Menzies
patent: 3998557 (1976-12-01), Javan
patent: 4426640 (1984-01-01), Becconsall et al.
Marthinsson et al., Optical and Quantum Electronics, vol. 12, No. 4, Jul. 1980, pp. 327-334.
Journal of Applied Physics, vol. 46, No. 7, Jul. 1975, W. B. Grant and R. D. Hake, Jr., pp. 3019-3023.
Optical Engineering, vol. 17, No. 6, Nov.-Dec. 1978, pp. 658-660.
Eagle-Elliott Absorption Gas Laser Equipment, GP-Elliott Electronic Systems Ltd., 4 pages.

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