Objective lens system for endoscopes

Details Objective lens system for endoscopes Objective lens system for endoscopes

1989-12-28

1992-01-21

Dzierzynski, Paul M.

Optical: systems and elements

Lens

Including a nonspherical surface

359664, G02B 1318

Patent

active

050832239

ABSTRACT:
An objective lens system includes, in order from the object side, a first lens component whose image side surface has a positive power and a second lens component whose image side surface has a positive power, said objective lens system having a wide field angle and sufficiently small inclination angles of the principal ray at all image heights.

REFERENCES:
patent: 4354734 (1982-10-01), Nakahashi
patent: 4867546 (1989-09-01), Nishioka et al.

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