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:
Oct. 14, 1980
Filed:
Aug. 24, 1978
Applicant:
Inventors:
Tsutomu Tojo, Hachiouji, JP;
Toshifumi Uetake, Hachiouji, JP;
Assignee:
Olympus Optical Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; G02B / ;
U.S. Cl.
CPC ...
3501 / ; 350217 ; 350222 ;
Abstract
An objective lens system for microscopes consisting of a front lens group comprising a positive lens component and a meniscus lens component having a concave surface on the image side, and a rear lens group comprising at least a meniscus cemented lens component, a positive lens component and at least one cemented three-element lens component. Said objective lens system is so designed as to have a large numerical aperture, secondary spectrum sufficiently minimized, a long working distance and curvature of field, coma etc. favorably corrected over a wide range of visual field.