Illumination optical system for microscopes

Details Illumination optical system for microscopes Illumination optical system for microscopes

1995-09-29

1997-08-05

Nguyen, Thong

Optical: systems and elements

Lens

Multiple component lenses

359385, G02B 906, G02B 2106

Patent

active

056548320

ABSTRACT:
An illumination optical system for microscopes is constructed so that in a transmissive Kohler illumination optical system having a light source, a condenser lens system, and an aperture stop, the condenser lens system includes, in order from the side of incidence of light, a first lens unit having a positive lens and a negative lens, with a positive power as a whole, and a second lens unit having a negative lens and a positive lens, with a positive power as a whole. The aperture stop is placed between the first and second lens units, and the illumination optical system satisfies the condition:

REFERENCES:
patent: 2738708 (1956-03-01), Rosin

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