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:
Jan. 10, 2017
Filed:
Dec. 25, 2013
Yu-hung Chou, Hsinchu, TW;
Pei-ching Liu, Hsinchu, TW;
Yu-Hung Chou, Hsinchu, TW;
Pei-Ching Liu, Hsinchu, TW;
Young Optics Inc., Hsinchu, TW;
Abstract
A zoom lens including a first lens group and a second lens group is provided. Refractive powers of the first lens group and the second lens group are respectively negative and positive. The first lens group includes a first lens, a second lens, and a third lens arranged in sequence from an object side to an image side. The second lens group is disposed between the first lens group and the image side, and includes a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens arranged in sequence from the object side to the image side. The zoom lens satisfies −2.4<f1/f<−1.0, wherein f1 is the effective focal length of the first lens group, and fis the effective focal length of the zoom lens at a wide end.