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:
Dec. 30, 2025
Filed:
Dec. 06, 2022
Sintai Optical (Shenzhen) Co., Ltd., ShenZhen, CN;
Asia Optical Co., Inc., Taichung, TW;
Po-Yuan Shih, Taichung, TW;
SINTÁI OPTICAL (SHENZHEN) CO., LTD., Shenzhen, CN;
ASIA OPTICAL CO., INC., Taichung, TW;
Abstract
A lens assembly includes a first lens, a second lens, and a third lens arranged sequentially from an object side to an image side along an optical axis. The first lens has positive refractive power. The second lens has a convex surface facing the image side and negative refractive power. The third lens has a convex surface facing the object side and negative refractive power. The lens assembly satisfies at least one of the following conditions: 2<f/D1<3.5; −3<f3/f<−1; 0.5 mm<D1+D3<2.4 mm; 0.7<f1/D1<2; wherein f is an effective focal length of the lens assembly, D1 is a maximum effective optical diameter of the first lens, D3 is a maximum effective optical diameter of the third lens, and f1 and f3 are an effective focal length of the first lens and the third lens, respectively.