Optical measuring device for detecting surface characteristics o

Details Optical measuring device for detecting surface characteristics o Optical measuring device for detecting surface characteristics o

1986-06-18

1988-02-23

McGraw, Vincent P.

Optics: measuring and testing

Of light reflection

250201, 369 45, G01J 2155, G11B 709

Patent

active

047266856

ABSTRACT:
In an optical measuring device including a laser ray source, a polarization prism, an objective lens to condensing parallel ray to the surface of a substance to be measured, and divided photo-sensor means to detect reflected ray, the divided photo-sensor means is two divided photo-sensors, to eliminate noise effect caused by the laser ray source.

REFERENCES:
patent: 4037959 (1977-07-01), Bumgardner
patent: 4262208 (1981-04-01), Suzki et al.
patent: 4390781 (1983-06-01), Musha
patent: 4422168 (1983-12-01), Ito et al.
patent: 4423495 (1983-12-01), Musha et al.
patent: 4450547 (1984-05-01), Nakamura et al.
patent: 4453239 (1984-06-01), Musha et al.
patent: 4455085 (1984-06-01), Kato et al.
patent: 4464050 (1984-08-01), Katz et al.

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