Process and apparatus for ascertainment of the valuation data of

Details Process and apparatus for ascertainment of the valuation data of Process and apparatus for ascertainment of the valuation data of

1977-02-04

1979-05-01

Corbin, John K.

Optics: measuring and testing

Crystal or gem examination

356239, G01N 2132

Patent

active

041520696

ABSTRACT:
Process and apparatus for determining the presence and location of inclusions within gems. A gem is initially scanned or irradiated along X and Y co-ordinates by a light bundle whose cross-section perpendicular to the scanning tracks is at least equal to the spacing between adjacent tracks. The intensity of light passing through the gem is measured to determine the possible existence of any inclusions. The gem and the source of light are next moved relative to each other along the Z co-ordinate, so that the focal point of the light rays moves within the gem to pinpoint the location of any inclusions therein.

REFERENCES:
patent: 2960909 (1960-11-01), Shipley
patent: 3867032 (1975-02-01), Bruck
patent: 4049350 (1977-09-01), Bruck

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