Immersion microscope objective lens

Details Immersion microscope objective lens Immersion microscope objective lens

2007-08-28

2007-08-28

Schwartz, Jordan M. (Department: 2873)

Optical: systems and elements

Lens

Microscope objective

C359S754000

Reexamination Certificate

active

11081517

ABSTRACT:
An immersion microscope objective lens includes, in the following order from an object side to an image side, a first lens group having positive refractive power as a whole, including a first lens component composed of a first meniscus lens and a second meniscus lens cemented to each other with their concave surfaces facing the object side, a second lens composed of a single lens having positive refractive power and a third lens composed of a negative lens and a positive lens cemented to each other, a second lens group having positive refractive power as a whole, including a fourth lens component composed of a negative lens and a positive lens cemented to each other, and a third lens group having a negative refractive power as a whole. Predetermined conditions are satisfied.

REFERENCES:
patent: 3530436 (1970-09-01), Bertele et al.
patent: 5659425 (1997-08-01), Suzuki
patent: 6700710 (2004-03-01), Watanabe
patent: 6747804 (2004-06-01), Fujimoto et al.
patent: 8-292374 (1996-11-01), None
patent: 2003-121750 (2003-04-01), None

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