Illumination optical system for endoscopes

Details Illumination optical system for endoscopes Illumination optical system for endoscopes

1992-10-23

1996-01-16

Dzierzynski, Paul M.

Optical: systems and elements

Lens

Including a nonspherical surface

359362, 385 33, G02B 302, G02B 1318, G02B 632

Patent

active

054853168

ABSTRACT:
An illumination optical system for endoscopes which comprises a lens component having at least one aspherical surface in a shape F(h) satisfying the condition mentioned below, and satisfies relationship of h=f.cndot..theta. or h=f.cndot.sin.theta.. This illumination optical system is capable of providing favorable luminance distributions on all planar surfaces, spherical surfaces and tubular surfaces. ##EQU1##

REFERENCES:
patent: 4610513 (1986-09-01), Nishioka et al.
patent: 4662725 (1987-05-01), Nisioka
patent: 4784118 (1988-11-01), Fantone et al.
patent: 4824225 (1989-04-01), Nishioka
patent: 4878745 (1989-11-01), Endo et al.
patent: 4929070 (1990-05-01), Yokota et al.
patent: 4952040 (1990-08-01), Igarashi
patent: 4953937 (1990-09-01), Kikuchi et al.

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