Objective lens system for fluorescence microscopes

Details Objective lens system for fluorescence microscopes Objective lens system for fluorescence microscopes

1995-02-17

1998-04-14

Nelms, David C.

Optical: systems and elements

Lens

Microscope objective

359658, G02B 2102

Patent

active

057399573

ABSTRACT:
A semi-apochromatic or apochromatic objective lens system for fluorescence microscopes comprising: a first lens unit which comprises a cemented lens component consisting of a meniscus lens element having a concave surface on the object side and a positive refractive power or a plano-convex lens element, and a meniscus lens element having a concave surface on the object side; a second lens unit which comprises a plurality of cemented lens components; and a third lens unit composed of a cemented lens component which consists, in order from the object side, of a positive lens element and a negative lens element, and has a weak refractive power, This objective lens system has a medium to high magnificaiton and a large numerical aperture, thereby being capable of forming an image having high resolution and high contrast.

REFERENCES:
patent: 3118964 (1964-01-01), Buzawa
patent: 5444573 (1995-08-01), Saito
patent: 5517360 (1996-05-01), Suzuki

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