Surface curvature measurement

Details Surface curvature measurement Surface curvature measurement

1996-02-05

1997-05-27

Gonzalez, Frank

Optics: measuring and testing

By polarized light examination

With light attenuation

356375, 356371, 356 401, G01B 1124

Patent

active

056337183

ABSTRACT:
The apparatus measure the radius of curvature of a reflective or partially reflective surface 18, and comprises first and second lasers 2, 4 which generate two parallel beams a known distance apart. A lens 12 focuses the beams, which are passed via a beam splitter 14 and transform lens 16 to the surface 18. The beams are reflected back via the transform lens 16 and the beam splitter 14 onto a detector 20. A processor 22 calculates the radius of curvature of the surface in dependence of the known distance X separating the beams and the positions of the beams on the detector 20.

REFERENCES:
patent: 4735508 (1988-04-01), Bellio
patent: 5067817 (1991-11-01), Glenn

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