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. 12, 2021
Filed:
Dec. 19, 2019
Sintai Optical (Shenzhen) Co., Ltd., ShenZhen, CN;
Asia Optical Co., Inc., Taichung, TW;
An-Kai Chang, Taichung, TW;
SINTAI OPTICAL (SHENZHEN) CO., LTD., Shenzhen, CN;
ASIA OPTICAL CO., INC., Taichung, TW;
Abstract
An optical lens includes a first lens, a second lens and a third lens in an order from an object side to an image side along an optical axis. The first lens is a lens having negative refractive power, and an object-side surface of the first lens is concave; the second lens is a lens having positive refractive power, and an image-side surface of the second lens is convex; the third lens is a lens having positive refractive power, and an image-side surface of the third lens is convex. The optical lens satisfies a condition. i.e., 3<D1/f<6, wherein D1 is an optical effective diameter of the first lens and f is effective focal length of the optical lens. The optical lens is characterized by wide-angle and short distance.