Apparatus for the spectroscopical examination of light transmitt

Details Apparatus for the spectroscopical examination of light transmitt Apparatus for the spectroscopical examination of light transmitt

1975-05-27

1976-11-02

Stern, Ronald J.

Optics: measuring and testing

Crystal or gem examination

G01N 2100

Patent

active

039893790

ABSTRACT:
Apparatus for the spectroscopical examination of light transmitting objects such as gems comprising a spectroscope unit, receptacle means for the gem provided with a light transmitting support, and a light source, the gem in the receptacle being situated at the point of intersection of the optical axes of the spectroscope and of the light source, the latter comprising a first overhead light source shining light onto the stone from above and a second, transillumination light source shining light through the stone, the angles between the optical axes of the spectroscope and the light sources being adjustable. The light emerging from the light sources is produced by a cold light projector and conducted to the light sources via fibre optics.

REFERENCES:
patent: 1744485 (1930-01-01), Michel et al.
patent: 2494078 (1950-01-01), Woodruff
patent: 3610756 (1971-10-01), Lenzen et al.
patent: 3751162 (1973-08-01), Long

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