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:
Feb. 23, 1982
Filed:
Mar. 12, 1979
Yoshiyuki Shimizu, Miura, JP;
Nippon Kogaku K.K., Tokyo, JP;
Abstract
A condenser optical system for a microscope comprises, in order from the light ray entrance side, a forward group and a rearward group. The forward group includes a negative lens component and a positive lens component either cemented to or separated from the negative lens component. The rearward group consists of a plurality of lens components and has a totally positive refractive power. The air separation between the forward group and the rearward group is smaller than the total center thickness of the rearward group. The front focus of the rearward group lies in the air separation. The condenser optical system is of high magnification and yet can perform good optical compensation for the light source.