Objective lens system for use within microscope

Details Objective lens system for use within microscope Objective lens system for use within microscope

1991-04-24

1993-08-10

Arnold, Bruce Y.

Optical: systems and elements

Lens

Microscope objective

359656, 359657, 359658, G02B 2102

Patent

active

052354652

ABSTRACT:
An objective lens system for use within a microscope includes a first to an eleventh lens which are disposed in that order from an object side to an image side with predetermined air spacings therebetween. The first lens in the form of a meniscus is made of quartz, and has a concave surface which is directed toward an object side. The second lens in the form of a meniscus is made of quartz, and has a convex surface which is directed toward the object side. Each of the third, fifth, sixth and eighth lenses is made of fluorite, and has a positive power. Each of the fourth, seventh and ninth lenses is made of quartz, and has a negative power. The tenth lens is made of either quartz or fluorite, and has a positive power. The eleventh lens in the form of a meniscus is made of quartz, and has a concave surface which is directed toward the image side. The system transmits ultraviolet and/or far ultraviolet light and corrects chromatic aberration.

REFERENCES:
patent: 3711186 (1973-01-01), O'Connor
patent: 5076676 (1991-12-01), Saito
patent: 5144475 (1992-09-01), Hayashi

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