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. 29, 2020
Filed:
Jan. 23, 2019
Coretronic Corporation, Hsin-Chu, TW;
Yi-Chin Chen, Hsin-Chu, TW;
Tao-Hung Kuo, Hsin-Chu, TW;
Wen-Chieh Chung, Hsin-Chu, TW;
Chuan-Te Cheng, Hsin-Chu, TW;
Coretronic Corporation, Hsin-Chu, TW;
Abstract
A fixed-focus projection lens including a first lens group, an aperture stop and a second lens group arranged sequentially along an optical axis of the fixed-focus projection lens in a direction from an outgoing side to an incoming side. The first lens group includes a first lens element to the sixth lens element arranged sequentially along the optical axis in a direction from the outgoing side to the incoming side. The second lens group includes a seventh lens element to an eleventh lens element arranged sequentially along the optical axis in a direction from the outgoing side to the incoming side. The material of the first lens element is plastic. The material of the second lens element to the eleventh lens element is glass. The fixed-focus projection lens of the disclosure has a smaller size, good optical quality and good durability of high temperature.