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:
Aug. 18, 2015
Filed:
May. 10, 2013
Genius Electronic Optical Co., Ltd., Taichung, TW;
Wang-Ting Ho, Taichung, TW;
Shih-Han Chen, Taichung, TW;
Jun-Guang Zhang, Taichung, TW;
Yi-Ta Chiang, Taichung, TW;
Abstract
An imaging lens includes first, second, third, and fourth lens elements arranged from an object side to an image side in the given order. The first lens element has a positive refractive power, and both of the object-side and image-side surfaces thereof have a convex portion near an optical axis of the imaging lens. The object-side and image-side surfaces of the second lens element respectively have a convex portion and a concave portion near the optical axis. The fourth lens has a negative refractive power, and the object-side surface thereof has a concave portion near the optical axis. The imaging lens satisfies EFL/CT≧5.3, where EFL is an effective focal length of the imaging lens, and CTis a thickness of the first lens element.