Microscope photography lens system

U.S. Patent Number: 5847869

Abstract: The present invention allows one to take an intermediate image formed by a microscope objective lens system and reform a clear image of it, at relatively low magnification, on a film surface. The present invention provides for a lens system which comprises, in order, from the observed object end, a first lens group having a convex surface facing toward the objective lens system end, and having positive refractive power, a second lens group, positioned to the rear of the intermediate image, and having negative refractive power, and a third lens group having positive refractive power. The lenses in the system are set to follow predetermined parameters.

Inventors: Ouchi; Yumiko (Tokyo, JP)

Assignee: Nikon Corporation (Tokyo, JP)

Application Number: 08/912,013

Issued: 1998-12-08

Expired: 2006-12-08

Classes: 359/434 ; 359/362; 359/645

Field of search: 359/362-382,420-422,431-435,643-645,656,661,689,690,719,744,748,753,784-790

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