Optical cell

Details Optical cell Optical cell

1990-01-16

1991-06-04

Hille, Rolf

350319, 350267, 350312, G02B 523, G02B 500, G02B 2602, G02B 524

Patent

active

050208845

ABSTRACT:
There is provided by this invention an optical filter comprised of a transparent housing having an inner cavity with frosted sides that diffuse and scatter incident light beams. For transmission of light the cavity is filled with an index of refraction matching fluid which offsets the diffusing and scattering effect of the frosted surfaces to make the optical filter appear optically clear at a predetermined frequency. The fluid has a vaporization coefficient wherein at excessive energy levels the fluid vaporizes and escapes from the orifice such that the high energy light beams are diffused and scattered so that the shutter prevents transmission of high energy light beams.

REFERENCES:
patent: 3614211 (1971-10-01), Letter
patent: 3711189 (1973-01-01), Novotny et al.
patent: 4288953 (1981-09-01), Whiteford
patent: 4337998 (1982-07-01), Basiulis
patent: 4521077 (1985-06-01), Minahan

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