Transmissivity inspection apparatus

Details Transmissivity inspection apparatus Transmissivity inspection apparatus

1987-02-02

1988-03-15

Rosenberger, R. A.

Optics: measuring and testing

For light transmission or absorption

356446, G01N 2117

Patent

active

047309326

ABSTRACT:
In a transmissivity inspection apparatus, laser beam is radiated onto an object to be inspected. Irregularly reflected laser light components produced from the object are detected by a photoelectric converter element. The transmissivity of the object with respect to the laser beam is inspected by a discriminator, based on a specific pattern of the irregularly reflected laser light components detected by the photoelectric converter element. The specific pattern of a transparent substance differs from that of a nontransparent substance, thereby to discriminate the nontransparent substance from the transparent substance.

REFERENCES:
patent: 3680965 (1972-08-01), Dilworth et al.
patent: 3693025 (1972-09-01), Brunton
patent: 3807870 (1974-04-01), Kalman

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