Optical testing system for distinguishing a silicon carbide gems

Details Optical testing system for distinguishing a silicon carbide gems Optical testing system for distinguishing a silicon carbide gems

1997-02-10

1998-11-10

Rosenberger, Richard A.

Optics: measuring and testing

Crystal or gem examination

356432, G01N 2187, G01N 2127

Patent

active

058352058

ABSTRACT:
Diamond gemstones and gemstones formed of crystals of silicon carbide are distinguished from each other by introducing a band of ultraviolet light into a target gemstone and measuring the transmissivity of that band of light by the gemstone. A diamond will transmit light within a certain band of the ultraviolet spectrum, while a silicon carbide gemstone will block light within this band. Several instruments for carrying out this procedure are described, including an instrument that utilizes a fiberoptic strand to convey ultraviolet light that has passed through the gemstone to a solid state photodetector.

REFERENCES:
patent: 1799604 (1931-04-01), Read
patent: 2869417 (1959-01-01), Allen
patent: 3610756 (1971-10-01), Lenzen et al.
patent: 3740142 (1973-06-01), Takubo
patent: 3794424 (1974-02-01), Eickhorst et al.
patent: 4255962 (1981-03-01), Ashman
patent: 4394580 (1983-07-01), Gielisse
patent: 4776917 (1988-10-01), Ogihara et al.
patent: 4906083 (1990-03-01), Sattler
patent: 4906093 (1990-03-01), Trossarelli
patent: 4907875 (1990-03-01), Bowley et al.
patent: 5118181 (1992-06-01), Yifrach et al.
patent: 5146288 (1992-09-01), Russell
patent: 5164586 (1992-11-01), Hohberg et al.
patent: 5260763 (1993-11-01), Yamashita
patent: 5379102 (1995-01-01), Takeuchi
patent: 5406367 (1995-04-01), Sopori
patent: 5468326 (1995-11-01), Cuomo et al.
patent: 5536943 (1996-07-01), Smith et al.

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