Liquid-immersion type objective lens system for microscopes

Details Liquid-immersion type objective lens system for microscopes Liquid-immersion type objective lens system for microscopes

1994-03-28

1996-06-25

Nelms, David C.

Optical: systems and elements

Lens

Microscope objective

359657, G02B 2102

Patent

active

055305903

ABSTRACT:
A liquid-immersion type objective lens system for microscopes comprising a first lens unit which comprises a plano-convex lens component or a plano-convex lens component having a cemented surface strongly convex on the image side and a positive lens component, a second lens unit which has a positive refractive power, and comprises a cemented surface having a strongly negative refractive power and allows a converging light bundle to emerge therefrom, and a third lens unit having a negative refractive power. The object system is configured so as to be capable of correcting variations of aberrations by moving the second lens unit relative to the first lens unit and the third lens unit in accordance with a thickness of a cover glass plate used in combination with the objective lens system.

REFERENCES:
patent: 2644943 (1951-07-01), Klein
patent: 4373785 (1983-02-01), Shoemaker
patent: 4666256 (1987-05-01), Shimizu

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