Folded path absorption cell gas sensor

Details Folded path absorption cell gas sensor Folded path absorption cell gas sensor

1980-05-05

1982-03-30

Smith, Alfred E.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250353, 250373, 350293, 350299, 356440, G01J 100, G01J 142, G02B 510

Patent

active

043226213

ABSTRACT:
In an optical absorption gas sensor there is a practical problem of obtaining a sufficiently long optical path necessary to provide the required sensitivity within a compact space. In the present invention the path length can be multiplied to about 2 meters in a hemispheric like chamber having a radius about 8 cm. A novel, compact and inexpensive cell structure for increasing the optical path length by multiple reflections is provided.

REFERENCES:
patent: 3319071 (1967-05-01), Werth et al.
patent: 3394253 (1968-07-01), Harrick et al.
patent: 3792272 (1974-02-01), Harte et al.
patent: 4111531 (1978-09-01), Lavelle et al.
patent: 4180734 (1979-12-01), Gedeon

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