The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 30, 2000
Filed:
Apr. 14, 1998
Applicant:
Inventors:
Assignee:
Olympus Optical Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
359692 ; 359691 ;
Abstract
The invention provides a microscope objective having a working distance longer than achieved so far in the prior art even at more than 100 magnifications. The objective comprises a lens group A that comprises a positive meniscus lens concave toward an object side thereof and a plurality of cemented lenses, has positive refractive power and converts light rays from an object to a converging light beam, and a lens group B having negative refractive power, and satisfies condition (1):