Image pickup unit for endoscope

Details Image pickup unit for endoscope Image pickup unit for endoscope

2007-02-20

2007-02-20

Lester, Evelyn A. (Department: 2873)

Optical: systems and elements

Lens

Reverse telephoto

C359S749000, C359S740000, C359S771000, C359S781000, C359S782000, C359S798000

Reexamination Certificate

active

11372041

ABSTRACT:
An image pickup unit which consists of an objective optical system and a solid-state image pickup device: the objective optical system being composed of a first negative lens unit comprising a first meniscus lens element having a convex surface on the object side and negative power, a second positive lens unit comprising a convex lens element and an aperture stop disposed between the first lens unit and the second lens unit and this image pickup unit having a small outside diameter, allowing a field angle to be changed little due to variations of parts and an assembling variation, and having a maximum field angle of 150° or larger.

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