Light absorbers

Details Light absorbers Light absorbers

1984-08-13

1986-08-26

Corbin, John K.

350276SL, G02B 0000

Patent

active

046079157

ABSTRACT:
A light absorber for use in a sampling tube used with sensitive optical pollution detectors the light absorber including a central light receiving conical surface inclined by at least one annular truncated conical surface to provide at least one annular groove or valley surrounding the central cone and wherein one wall of the groove or valley is undercut to shade the base of the groove or valley from direct impinging light.

REFERENCES:
patent: 3185975 (1965-05-01), Kompelien
patent: 4166960 (1979-09-01), Meili
patent: 4315158 (1982-02-01), Kakigi et al.

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