Objective lens system for microscopes

Details Objective lens system for microscopes Objective lens system for microscopes

1984-03-05

1985-09-10

Corbin, John K.

G02B 2102

Patent

active

045402485

ABSTRACT:
An objective lens system for microscopes comprising a first positive lens component, a second positive cemented doublet, a third lens unit comprising at least one cemented lens, a fourth meniscus cemented doublet having a convex surface on the object side and a fifth negative cemented doublet. Said objective lens system has a working distance longer than twice of its focal length and an image surface which is flat over a wide range up to a field number of 27.

REFERENCES:
patent: 3525562 (1970-08-01), Klein
patent: 4231637 (1980-11-01), Sussman
patent: 4261654 (1981-04-01), Rybicki
patent: 4384765 (1983-05-01), Danner

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