Optical arrangement for microscope objective

Details Optical arrangement for microscope objective Optical arrangement for microscope objective

2005-07-05

2005-07-05

Schwartz, Jordan M. (Department: 2873)

Optical: systems and elements

Lens

Microscope objective

C359S656000

Reexamination Certificate

active

06914728

ABSTRACT:
This invention relates to a microscope having an infinity-corrected objective and providing a flat field of view. The present invention is an optical arrangement that broadly comprises a first lens element having positive power and comprising at least one lens, a second lens element having negative power and comprising at least one lens, a third lens element having positive power and comprising at least one lens, a fourth lens element having positive power and comprising at least one lens, and a fifth lens element comprising at least one lens and having positive power, and, in addition comprising a configuration in which the radius of curvature of the surface of the fifth lens element proximate to the object plane is less than the radius of curvature of the surface of the fifth lens element distal to the object plane, with the optical arrangement arrayed such that the distance from the first lens element to the second lens element is sufficient to reduce a ray height of a light ray entering the second lens element from the ray height of the same light ray entering said first lens element.

REFERENCES:
patent: 3137761 (1964-06-01), Conradi et al.
patent: 3380793 (1968-04-01), Klein
patent: 3530436 (1970-09-01), Bertele et al.
patent: 4009945 (1977-03-01), Klein
patent: 4563060 (1986-01-01), Yamagishi
patent: 5517360 (1996-05-01), Suzuki
patent: 6560032 (2003-05-01), Hatano
K.D. Sharma. “Medium Power Microobjective: A New Design”, Applied Optics, vol. 24, p. 299, Jan., 1985.

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