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. 04, 2022
Filed:
Apr. 05, 2019
Tokyo Visionary Optics Co., Ltd., Tokyo, JP;
Kaoru Yamazaki, Sukagawa, JP;
TOKYO VISIONARY OPTICS CO., LTD., Tokyo, JP;
Abstract
There is provided an imaging lens with high-resolution which satisfies demand of wide field of view, low-profileness and low F-number in well balance, and excellently corrects aberrations. An imaging lens comprises, in order from an object side to an image side, a first lens, a second lens having negative refractive power near the optical axis, a third lens having a convex surface facing the image side near the optical axis, a fourth lens and a fifth lens, wherein said first lens has negative refractive power near the optical axis, an image-side surface of said fifth lens has a convex surface facing the image side near the optical axis, and below conditional expressions are satisfied:3.00<(4/)×100<5.900.40<2/5<1.45whereT4: a distance along the optical axis from the image-side surface of the fourth lens to the object-side surface of the fifth lens,f: a focal length of the overall optical system of the imaging lens,f2: a focal length of the second lens,f5: a focal length of the fifth lens.