Backscatter haze measurement using a distributed light source

Details Backscatter haze measurement using a distributed light source Backscatter haze measurement using a distributed light source

1995-04-04

1997-06-03

Gregory, Bernarr E.

Optics: measuring and testing

Of light reflection

With diffusion

G01N 2147

Patent

active

H00016551

ABSTRACT:
System and method for in situ measurement of haze in a transparency, such as an aircraft windscreen, canopies, windows or the like are described which comprise an annular light source for illuminating a selected test area of the transparency along a selected optical axis, a photodetector, and a lens for projecting an image of the illuminated test area along the axis onto the photodetector.

REFERENCES:
patent: 3327583 (1967-06-01), Vanderschmidt et al.
patent: 3771877 (1973-11-01), Rosencranz
patent: 4029420 (1977-06-01), Simms
patent: 4076421 (1978-02-01), Kishner
patent: 4623258 (1986-11-01), Task et al.
patent: 4687338 (1987-08-01), Task et al.

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