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:
Feb. 25, 2025
Filed:
Oct. 19, 2021
Sekonix Co., Ltd., Gyeonggi-do, KR;
Ki Youn Noh, Gyeonggi-do, KR;
Soon Cheol Choi, Gyeonggi-do, KR;
Sung Nyun Kim, Incheon, KR;
Seong Jun Bae, Gyeonggi-do, KR;
SEKONIX CO., LTD., Gyeonggi-do, KR;
Abstract
Disclosed is a small lens system including a first lens, a second lens, a third lens, and a fourth lens sequentially arranged from an object along an optical axis, wherein the thickness (ct) of the first lens, the thickness (ct) of the second lens, the thickness (ct) of the third lens, and the thickness (ct) of the fourth lens satisfy ct+ct>ct+ct, ct>ct, ct>ct, and ct>ct, the front surface of the first lens is convex toward the object while the sagittal amount of the first lens is increased depending on the height thereof, the refractive power (P) of the second lens satisfies −0.01 mm<P<0.01 mm, the front curvature (C) and the rear curvature (C) of the second lens satisfy |C|<0.1 mmand |C|<0.1 mm, and the f-number of the lens system is less than 1.4.