Objective lens system for endoscopes

Details Objective lens system for endoscopes Objective lens system for endoscopes

2000-02-01

2000-10-17

Epps, Georgia

Optical: systems and elements

Lens

Multiple component lenses

359753, 359660, 600101, 600176, 600181, G02B 912, G02B 1304, G02B 2102, A61B 100, A61B 106

Patent

active

061340561

ABSTRACT:
An objective lens system for endoscopes comprising a first lens component (L.sub.1) which has no or a negative refractive power, a second lens component (L.sub.2) which has a convex image side surface and a third lens component (L.sub.3) which has a convex object side surface, wherein a radius of curvature r.sub.3F on the object side surface of the third lens component and a thickness of the third lens component satisfy the following condition:

REFERENCES:
patent: 4858002 (1989-08-01), Zobel
patent: 5083223 (1992-01-01), Igarashi
patent: 5954633 (1999-09-01), Hirata
patent: 6038079 (2000-03-01), Michaels

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