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:
Aug. 27, 2024
Filed:
Jun. 24, 2020
Nidec Sankyo Corporation, Nagano, JP;
Yosuke Kanzaki, Nagano, JP;
NIDEC SANKYO CORPORATION, Nagano, JP;
Abstract
The present invention provides a wide-angle lens capable of obtaining a suitable negative power even when a thickness of a first lens is increased in order to increase strength against impact. The wide-angle lenshas a front group, an aperture, and a rear group. Assuming that a central thickness in an optical axis direction of a first lensis T1 (mm) and a focal length of the entire lens system is f0 (mm), the following conditional expression:1.500≤1/0≤2.000 Conditional expression (1)is satisfied. Therefore, it is possible to suppress the first lensfrom being damaged by impact. In addition, it is possible to prevent the first lensfrom becoming too thick to obtain suitable negative power.