Light absorbers

Details Light absorbers Light absorbers

G - Physics

02

B

88/122

G02B 6/00 (2006.01) G01N 21/53 (2006.01) G08B 17/107 (2006.01)

Patent

CA 1242343

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 surrounded by at least one annular truncated conical surface to provide at least one annular groove or valley surrounding the central cone wherein one wall of the groove or valley is undercut to shade the base of the groove or valley from direct impinging light.

460904

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