Apparatus and method for providing spot lighting for...

Details Apparatus and method for providing spot lighting for... Apparatus and method for providing spot lighting for...

2006-03-21

2008-10-14

Punnoose, Roy M. (Department: 2886)

Optics: measuring and testing

Crystal or gem examination

Reexamination Certificate

active

07436497

ABSTRACT:
An apparatus, system and method for providing spot lighting for observing a gemstone is presented. In particular, the spot lighting provided by the invention allows for observing of the fire of a gemstone, i.e. the visible effects of light dispersion into separate colors. The apparatus includes a tube for receiving a portion of a multi-spectral light source, and a mask coupled to the tube for blocking other portions of the light source. By selecting the proper tube dimensions and aligning the tube with both the light source at an inlet and a gemstone at an outlet, the spot lighting source provides direct lighting for isolating and accentuating the effects of fire.

REFERENCES:
patent: 3751162 (1973-08-01), Long
patent: 3989379 (1976-11-01), Eickhorst
patent: 4906083 (1990-03-01), Sattler
T. Scott Hemphill, Modeling the Appearance of the Round Brilliant Cut Diamond: An Analysis of Fire of Brilliance, Fall 1998, Gems & Gemology, pp. 158-183.
Irene M. Reinitz, Modeling the Appearance of the Round Brilliant Cut Diamond: An Analysis of Fire, and More about Brilliance, Fall 2001, Gems & Gemology, pp. 174-197.

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