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:
Jul. 04, 2017
Filed:
Oct. 06, 2015
Sintai Optical (Shenzhen) Co., Ltd., Shenzhen, Guandong Province, CN;
AO Ether Corporation, Taichung, TW;
Yuan-Fan Liang, Taichung, TW;
Tsan-Haw Lee, Taichung, TW;
SINTAI OPTICAL (SHENZHEN) CO., LTD., Shenzhen, Guangdong Province, CN;
AO ETHER CORPORATION, Taichung, TW;
Abstract
A wide-angle lens, from an object side to an image side along an optical axis, includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens. The first, second and third lens are with negative refractive power. The fourth, fifth, sixth and seventh lens are with refractive power. The eighth lens is a biconvex lens with positive refractive power. The ninth lens is a biconvex lens with positive refractive power. The first lens, the second lens and the third lens satisfy: −26<f/f<f/f<f/f<−3 and −1.64<f/f<−1.6 wherein fand fare effective focal lengths of the first and second lenses, fand f are an effective focal lengths of the third lens and the wide-angle lens, and fis an effective focal length of the combination of the first lens, second lens and third lens.