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. 24, 2021
Filed:
Sep. 19, 2019
Sekonix Co., Ltd., Gyeonggi-do, KR;
Soon Cheol Choi, Gyeonggi-do, KR;
Ki Youn Noh, Gyeonggi-do, KR;
Seung Nam Nam, Gyeonggi-do, KR;
Sung Nyun Kim, Incheon, KR;
Abstract
A small lens system having five lenses arranged along an optical axis from a focal object side in order of a first, a second, a third, a fourth, and a fifth lens is proposed. A center interval (T) of the first and the second lens is T<0.2 mm, and an effective outermost interval (T) satisfies T<0.2 mm. The fifth lens has a positive refractive power, a front surface convex toward the focal object, a rear curvature (C10) satisfying −0.01<C10<0.01, and the periphery of a rear surface convex upwards. A center interval (T) of the fourth and the fifth lens is T<0.1 mm and an effective outermost distance (T45e) thereof satisfies T45e>0.35 mm. Thicknesses of each lens from the first to the fifth lens and a distance (TL) from the front to the rear surface of the lens system satisfy (ct1+ct2+ct3+ct4+ct5)/TL<0.47.