Moire contouring camera

Details Moire contouring camera Moire contouring camera

1991-10-21

1993-02-23

Evans, F. L.

Optics: measuring and testing

By polarized light examination

With light attenuation

250237G, G01B 1124

Patent

active

051894939

ABSTRACT:
A moire contouring imaging device for small field moire imaging in which both the illumination and viewing optical beam paths pass through a common primary lens and optical grating. The use of such common optical elements improves optical stability and accuracy since magnification and focal length and other mismatching between discrete optical elements in the viewing and illumination paths are avoided. The device is assembled in a rugged elongated housing. The device further incorporates mechanisms for either translating the grating to generate a moire phase shift, or translating the folding mirror of the system to provide a moire field shift.

REFERENCES:
patent: 3614237 (1971-10-01), Kyle et al.
patent: 4212073 (1980-07-01), Balasubramanian
patent: 4564295 (1986-01-01), Halioua
patent: 4794550 (1988-12-01), Greivenkamp, Jr.

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