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:
Jan. 29, 2019
Filed:
Nov. 01, 2017
Olympus Corporation, Hachioji-shi, Tokyo, JP;
Keisuke Ichikawa, Tama, JP;
Shinichi Mihara, Tama, JP;
OLYMPUS CORPRATION, Tokyo, JP;
Abstract
A single-focus optical system includes a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, and a third lens unit having a positive refractive power. The first lens unit includes at least a first sub-unit, a second sub-unit, and a third sub-unit. The first sub-unit includes a negative lens component, the second sub-unit includes two meniscus lens components, and the third sub-unit includes a plurality of positive lens components. The third lens unit includes a front side sub-unit and a rear side sub-unit, and the front side sub-unit includes only a positive lens component. At the time of focusing, the first lens unit is fixed, the second lens unit is movable, and the rear side sub-unit is fixed.