Surface inspection apparatus and method
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United States of America Patent
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Jul 6, 1993
Grant Date -
N/A
app pub date -
Oct 28, 1991
filing date -
Oct 28, 1991
priority date (Note) -
Expired
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Abstract
An apparatus for inspecting a reflective surface of an article for defects includes a point light source for generally uniformly illuminating the entire surface of the article under inspection, and a diffusing screen for intercepting the light rays reflected from the surface under inspection of the article. The intercepted light rays produce a high resolution image on the screen consisting of bright and dark areas or spots corresponding to surface defects in the article under inspection.
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