Method and apparatus for noncontact surface contour measurement

Details Method and apparatus for noncontact surface contour measurement Method and apparatus for noncontact surface contour measurement

1993-01-14

1995-08-29

Evans, F. L.

Optics: measuring and testing

By polarized light examination

With light attenuation

382141, G01B 1124

Patent

active

054465494

ABSTRACT:
Light at known angles is impinged onto an object whose contour is to be mured and a camera is used to receive the reflected light which is then recorded. A computer processes the images, mathematically manipulating them so that surface slopes are known. The slopes are than integrated to obtain local elevations which represent the object contour.

REFERENCES:
patent: 4912336 (1990-03-01), Nayar et al.
patent: 5067817 (1991-11-01), Glenn
patent: 5106183 (1992-04-01), Voder

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