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. 20, 2016
Filed:
Oct. 23, 2015
Sintai Optical (Shenzhen) Co., Ltd., Shenzhen, Guangdong Province, CN;
AO Ether Corporation, Taichung, TW;
Yuan-Fan Liang, Taichung, TW;
SINTAI OPTICAL (SHENZHEN) CO., LTD., Shenzhen, Guangdong Province, CN;
AO ETHER CORPORATION, Taichung, TW;
Abstract
A lens assembly includes a first lens, a second lens, a stop, a third lens and a fourth lens, all of which are arranged in sequence from an object side to an image side along an optical axis. The first lens and the fourth lens are with negative refractive power. The second lens and the third lens are biconvex lenses with positive refractive power. The first, third, fourth lens include an object side surface and an image side surface respectively, wherein at least one of the object side surface and the image side surface is an aspheric surface. The lens assembly satisfies: 0<|f/f|<|f/f|<2, f/D>1 wherein f, f, f, f, and f is an effective focal length of the first, second, third, fourth lens and the lens assembly, and Dis an interval from the first lens to the second lens along the optical axis.