Objective lens design for miniature endoscope

Details Objective lens design for miniature endoscope Objective lens design for miniature endoscope

A - Human Necessities

61

B

A61B 1/00 (2006.01) G02B 23/24 (2006.01) A61B 1/002 (2006.01)

Patent

CA 2621882

An endoscope objective lens system design is disclosed, generally comprising a first lens group having overall negative refractive power, a second lens group having overall positive refractive power, and an aperture diaphragm disposed between the first and second lens groups wherein the first lens group includes a plano-concave lens with its concave surface facing the objective end of the endoscope.

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