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:
Nov. 05, 2013
Filed:
Sep. 22, 2008
Keiji Matsusaka, Osaka, JP;
Toru Nakatani, Uda, JP;
Keiji Matsusaka, Osaka, JP;
Toru Nakatani, Uda, JP;
Konica Minolta Opto, Inc., Tokyo, JP;
Abstract
A wide-angle optical system comprises a front lens group (), and a rear lens group (), with an aperture stop () interposed between. The front lens group () includes at least two negative lenses () and at least one positive lens (). At least one of the positive lenses included in the front lens group () has at least one aspherical surface. The front lens group () satisfies the conditional expression vdp<29 where vdp is the minimum value of the Abbe number of the positive lens(es) included in the front lens group ().
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile