Method and apparatus for determining the surface quality of an o

Details Method and apparatus for determining the surface quality of an o Method and apparatus for determining the surface quality of an o

1988-01-13

1990-01-23

Evans, F. L.

Optics: measuring and testing

By polarized light examination

With light attenuation

356237, G01B 1124

Patent

active

048954489

ABSTRACT:
A method for determining the surface quality of an object includes the steps of providing an object having a surface and projecting a series of spaced parallel lines onto the surface of the object from a first axis. The pattern formed by the lines on the object surface is viewed and any non-uniformlty of the object's surface is ascertained by observing a variation of the line spacing on the object's surface.

REFERENCES:
patent: 3627427 (1971-12-01), Johnson et al.
patent: 4742237 (1988-05-01), Ozawa
Hammond et al, IBM Technical Disclosure Bulletin, vol. 14, No. 1, Jun. 1971, pp. 49 and 50.
Herman et al., Technical Digest, No. 44, Oct. 1976, pp. 27 and 28.

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