High mangification objective lens system

Details High mangification objective lens system High mangification objective lens system

1991-07-05

1992-07-21

Sugarman, Scott J.

Optical: systems and elements

Lens

Microscope objective

359754, G02B 2102, G02B 964

Patent

active

051328453

ABSTRACT:
A high magnification objective lens system comprising, in the order from the object side, a first positive lens unit which comprises a positive meniscus lens component having a concave surface on the object side and a plurality of positive cemented lens components, and has a function to converge a light bundle coming from an object, a second negative lens unit which comprises a negative lens component having a concave surface on the object side, a third lens unit which comprises a positive cemented lens component and has a positive refractive power, and a fourth lens unit which has a negative refractive power. This objective lens system has magnification on the order of 250.times. and a long working distance, and is of the apochromatic grade.

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