Optical illumination system for endoscope

Details Optical illumination system for endoscope Optical illumination system for endoscope

1993-01-19

1994-10-11

Sykes, Angela D.

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Light application

128 4, 606 17, A61B 106

Patent

active

053543220

ABSTRACT:
An endoscope illumination optical system includes a spherical lens element and a divergent lens element, positioned in order from a circular light exit end of a light guide fiber bundle. The spherical lens element has a refractive index n satisfying the following conditions when sin=r/R:

REFERENCES:
patent: 3494354 (1970-02-01), Yokota et al.
patent: 4446871 (1984-05-01), Imura
patent: 5167686 (1992-12-01), Wong

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