Moire contouring camera

Details Moire contouring camera Moire contouring camera

1990-11-02

1991-12-03

Evans, F. L.

Optics: measuring and testing

By polarized light examination

With light attenuation

250237G, G01B 1124

Patent

active

050695495

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. Additional features are provided to avoid the effects of unwanted stray light reflected off rear surfaces of optical elements within the system.

REFERENCES:
patent: 3245307 (1966-04-01), De Lang
patent: 3614237 (1971-10-01), Kyle et al.
patent: 4525858 (1985-06-01), Cline et al.
patent: 4564295 (1986-01-01), Halioua
patent: 4577940 (1986-03-01), Krasinski et al.
patent: 4641972 (1972-02-01), Halioua et al.
Cline et al., "Automatic Moire Contouring", Applied Optics, vol. 23, No. 10, 15 May 1984, pp. 1454-1459.
Harding et al--Small Angle Moire Contouring, SPIE, vol. 85-Optics, Illumination, and Image Sensing for Machine Vision II, 1987, pp. 166-173.

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