Apparatus for geometrical testing of spherical bodies, in partic

Details Apparatus for geometrical testing of spherical bodies, in partic Apparatus for geometrical testing of spherical bodies, in partic

1988-06-30

1990-10-02

Evans, F. L.

Optics: measuring and testing

By polarized light examination

With light attenuation

356391, 356237, G01B 1130

Patent

active

049603329

ABSTRACT:
An apparatus for the testing of spheres for geometric exactness, which comprises a light source, a projectable image within or outside of said light source, optical means for simultaneously directing light in two different directions wherein one of said directions is onto a sphere to be tested and the other of said directions in onto an imaging means, and means for directing light onto said imaging means either as reflected from the sphere to be tested, or both from the sphere and from the light source without the optical interposition of the sphere.

REFERENCES:
patent: 3907438 (1975-09-01), Holeman

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