Objective lens for microscopes

Details Objective lens for microscopes Objective lens for microscopes

1989-06-05

1991-02-05

Dzierzynski, Paul M.

350478, G02B 2102

Patent

active

049899570

ABSTRACT:
An objective lens for microscopes comprises a first lens unit, a second lens unit which is movable along an optical axis, and a third lens unit. The second lens unit includes elements of a compound lens component cemented to each other to dispose an optical modulator consisting of an annular phase diaphragm on their cemented surface. The objective lens is capable of canceling variation of aberration caused by a thickness of a cover glass and bringing about a modulated image with favorable contrast.

REFERENCES:
patent: 4403835 (1983-09-01), Ushida
patent: 4666256 (1987-05-01), Shimizu et al.

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