Flexible light guide having a liquid core and illuminating devic

Details Flexible light guide having a liquid core and illuminating devic Flexible light guide having a liquid core and illuminating devic

1991-07-31

1992-11-24

Cole, Richard R.

Illumination

Revolving

362318, 385125, F21V 800

Patent

active

051657732

ABSTRACT:
A flexible light guide consists essentially of a flexible tube made of an amorphous fluoropolymer based on a combination of terafluoroethylene and a fluorinated cyclical ether, and a transparent liquid filling the tube. The liquid has an index of refraction which is higher than that of the material of the tube. The light guide may be provided with means for continously passing the liquid through the tube. In this case, the liquid may be physiological sodium chloride solution and the light guide may be a part of an endoscopic illumination device useful for endoscopic coagulation.

REFERENCES:
patent: 3740113 (1973-06-01), Cass
patent: 3920980 (1975-11-01), Nath
patent: 3995934 (1976-12-01), Nath
patent: 4009382 (1977-02-01), Nath
patent: 4045119 (1977-08-01), Eastgate
patent: 4685766 (1987-08-01), Nishimura et al.
patent: 4747662 (1988-05-01), Fitz
patent: 4927231 (1990-05-01), Levatter
Brochure entitled Teflon Amorphous Fluoropolymer distributed by DuPont.

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