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. 29, 2018
Filed:
Jan. 07, 2016
Hiroshi Nakanuma, Kanagawa, JP;
Hiroshi Nakanuma, Kanagawa, JP;
RICOH COMPANY, LTD., Tokyo, JP;
Abstract
A single focal imaging optical system includes, in order from an object side, a first lens group with a positive power, an aperture stop, and a second lens group with a positive power. The first lens group includes a first front lens group and a first rear lens group. The first front lens group includes a negative lens having a concave surface on an image side and a positive meniscus lens having a concave surface on the object side. The first rear lens group includes a biconvex lens. The second lens group includes a second front lens group with a negative power and a second rear lens group with a positive power. The system satisfies a following condition: 3.2<f/f<9.0, where frepresents a composite focal length of the first lens group and frepresents a composite focal length of the second lens group.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile