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:
Nov. 21, 2017
Filed:
Oct. 25, 2016
Glory Science Co., Ltd., Changhua Hsien, TW;
Feng-Chao Chung, Changhua Hsien, TW;
Kun-Ti Liu, Changhua Hsien, TW;
Glory Science Co., Ltd., Changhua Hsien, TW;
Abstract
An optical telephoto imaging lens includes an aperture stop and a lens group, the lens group includes, in order from an object side to the image side: a first lens element with a positive refractive power; a second lens element with a negative refractive power; a third lens element with a refractive power; a fourth lens element with a negative refractive power; a fifth lens element with a positive refractive power. The first, second, third, fourth and fifth lens elements each have a focal length: f1, f2, f3, f4 and f5, the object-side and the image-side surfaces of the second lens element each have a radius of curvature R3, R4, and they satisfy the relations: |fn|>|f4|>|f2|>|f1|, wherein n=3 and 5; 0<(R3+R4)/(R3−R4)<0.5.