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:
Oct. 24, 2023
Filed:
Dec. 09, 2020
Nidec Sankyo Corporation, Nagano, JP;
Tadashi Komiyama, Nagano, JP;
Yosuke Kanzaki, Nagano, JP;
NIDEC SANKYO CORPORATION, Nagano, JP;
Abstract
Provided is a wide-angle lens, including a lens group and a diaphragm. Lenses in the lens group are sequentially arranged from an object side in a manner sandwiching the diaphragm. A maximum half field of view of the wide-angle lens as a whole is set to ω, 98°<ω<120° is satisfied. An effective focal length and an entrance pupil diameter of the wide-angle lens as a whole are set to f and HEP respectively, f/HEP<2.3 is satisfied. The lens group includes a first lens that is located closest to the object side and that is a negative lens with a concave surface facing an image side. An effective radius and a radius of curvature of an image side lens surface of the first lens are set to sd12 and R12 respectively, 0.890<sd12/R12<0.970 is satisfied.