Optical system for endoscopes

Details Optical system for endoscopes Optical system for endoscopes

1989-09-11

1991-09-24

Arnold, Bruce Y.

Optical: systems and elements

Lens

With reflecting element

359708, 359663, B29D 1100, G02B 1700, G02B 960

Patent

active

050509748

ABSTRACT:
An optical system for endoscopes so adapted as to be usable with video endoscopes, comprising an imaging lens system equipped with an aperture stop and a field lens component arranged on the image side thereof, and so designed as to prevent the color shading from being produced by selecting an adequate focal length for the field lens component.

REFERENCES:
patent: 4403837 (1983-09-01), Nakahashi
patent: 4662725 (1987-05-01), Nisioka
patent: 4976524 (1990-11-01), Chiba
patent: 4986642 (1991-01-01), Yokota et al.

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