Microscope objective with ball lens and protection plate

Details Microscope objective with ball lens and protection plate Microscope objective with ball lens and protection plate

1996-12-04

1999-04-27

Sugarman, Scott J.

Optical: systems and elements

Lens

Microscope objective

359660, G02B 2102

Patent

active

058985247

ABSTRACT:
An objective lens system with protection glass for a microscope and having a numerical aperture of 1.25 and using an immersion oil, having a first, second, third and fourth lens groups, the first lens group being a plano-parallel plate cemented to a hemispherical lens, the second lens group being one aplanatic meniscus, the third lens group being three cemented doublets, and the fourth lens group being two lens components including a positive and a negative meniscus component which are arranged with their concave surface opposite each other. The objective lens system has a relatively small number of lens components, and the aberration, especially chromatic, spherical, coma, astigmatic difference and curvature of field, are corrected favorably.

REFERENCES:
patent: 3405993 (1968-10-01), Aklin et al.
patent: 3583789 (1971-06-01), Rosenberger
patent: 3743386 (1973-07-01), Aklin et al.

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