Endoscope objective lens system

Details Endoscope objective lens system Endoscope objective lens system

2008-05-27

2008-05-27

Schwartz, Jordan M. (Department: 2873)

Optical: systems and elements

Lens

Reverse telephoto

C359S740000

Reexamination Certificate

active

07379252

ABSTRACT:
An endoscope objective lens system includes a negative front lens group, a diaphragm, and a positive rear lens group, in this order from the object. The negative front lens group includes one lens element, or a plurality of non-cemented lens elements; and the most object-side lens element is constituted by a negative lens element. The positive rear lens group includes a plurality of non-cemented lens elements; and at least one negative lens element is provided in the positive rear lens group.

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English Language Abstract of JP 10-020189.
English Language Abstract of JP 2001-100091.
English Language Abstract of JP 2002-228926.
English Language Abstract of JP 2002-277734.
English Language Abstract of JP 2002-303789.
English Language Abstract of JP 2004-117607.

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