Optical readhead

Details Optical readhead Optical readhead

1985-02-21

1986-12-30

Evans, F. L.

Optics: measuring and testing

By shade or color

With color transmitting filter

356446, G01J 351, G01N 2147

Patent

active

046325590

ABSTRACT:
Reflectance apparatus is disclosed for obtaining measurement of nonspecular reflected light in which controlled light rays are directed by means of a lens and transmission path from a light source through a light trap to expose or illuminate a specimen and nonspecular reflected light is passed from the specimen through the light trap along a transmission path to one or more detectors where the nonspecular reflected light is measured.

REFERENCES:
patent: 1834905 (1931-12-01), Sheldon
patent: 3999864 (1976-12-01), Mutter
patent: 4033698 (1977-07-01), Demsky et al.
patent: 4115067 (1978-09-01), Lyshkow
patent: 4171909 (1979-10-01), Kramer et al.

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