Optical detector assembly

Details Optical detector assembly Optical detector assembly

1984-05-17

1987-05-05

Rosenberger, R. A.

Optics: measuring and testing

For light transmission or absorption

Of fluent material

250573, 165 42, G01N 2117

Patent

active

046627588

ABSTRACT:
An optical detector assembly comprises a casing formed therein with a through bore having front and rear openings and a pair of opposite cavities located at both sides of the through bore, an air duct member disposed within the through bore to permit the flow of air passing therethrough, the duct member being formed at its peripheral wall with a pair of radial holes opening toward the cavities respectively, a light emission element arranged within one of the cavities to emit a luminous ray and pass it through the radial holes of the duct member toward the other cavity, a light receiving element arranged within the other cavity to receive the luminous ray emitted from the light emission element and passed through the radial holes, and an air induction assembly coupled over the front opening of the through bore for preventing entry of alien particles such as dirt, water, snow and the like into the duct member.

REFERENCES:
patent: 3170068 (1965-02-01), Petriw et al.
patent: 3524707 (1970-08-01), Hansen et al.
patent: 4113386 (1978-09-01), Lepper
patent: 4238194 (1980-12-01), Dunham
patent: 4259722 (1981-03-01), Iwata et al.
patent: 4437391 (1984-03-01), Eguchi et al.

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