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US 4,877,314 AGranted
Objective lens system for endoscopes
AssigneeOlympus Optical Co., Ltd.
InventorIwao Kanamori
Life of this patent
Estimating the term…
Abstract
A compact objective lens system for endoscopes designed for a field angle smaller than 40.degree., having favorable corrected aberrations and comprising a plural number of lens components, the first lens component arranged on the extreme object side out of said plural number of lens components having positive refractive power.
Claims16
An objective lens system for endoscopes having a field angle of 40.degree. or smaller and comprising a first lens component arranged on the extreme object side in said objective lens system and having positive refractive power as a whole;
- a master lens arranged on the extreme image side in said objective lens system and having positive refractive power and comprising a lens component arranged on the extreme object side in said master lens and having positive refractive power and an aperture stop arranged between said first lens component and said master lens.
Dependencies are inferred from the claim text.