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. 19, 2020
Filed:
Sep. 04, 2018
Kantatsu Co., Ltd., Yaita-shi, Tochigi, JP;
Kaoru Yamazaki, Sukagawa, JP;
KANTATSU CO., LTD., Yaita-shi, JP;
Abstract
There is provided an imaging lens with high-resolution which satisfies, in well balance, demand of the wide field of view, the low-profileness and the low F-number and excellently corrects aberrations. An imaging lens comprises in order from an object side to an image side, a first lens having negative refractive power, a second lens, a third lens, a fourth lens, and a fifth lens, wherein said second lens has the negative refractive power, and below conditional expressions are satisfied:0.1<2/3<1.169<3/4<20−0.1<5/6<1.4whereT2: distance along an optical axis from an image-side surface of the second lens to an object-side surface of the third lens,T3: distance along the optical axis from an image-side surface of the third lens to an object-side surface of the fourth lens,r3: paraxial curvature radius of an object-side surface of the second lens,r4: paraxial curvature radius of an image-side surface of the second lens,r5: paraxial curvature radius of an object-side surface of the third lens, andr6: paraxial curvature radius of an image-side surface of the third lens.