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:
Feb. 09, 2016
Filed:
Nov. 11, 2013
Applicants:
Sintai Optical (Shenzhen) Co., Ltd., Shenzhen, Guandong Province, CN;
Asia Optical International Ltd., Tortola, GB;
Inventor:
Tsan-Haw Lee, Taichung, TW;
Assignees:
SINTAI OPTICAL (SHENZHEN) CO., LTD., Shenzhen, Guandong Province, CN;
ASIA OPTICAL INTERNATIONAL LTD., Tortola, VG;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 3/02 (2006.01); G02B 13/04 (2006.01);
U.S. Cl.
CPC ...
G02B 13/04 (2013.01);
Abstract
A projection lens includes a first lens group, a second lens group and a third lens group, all of which are arranged in sequence from an projection side to an image source side along an optical axis. The first lens group is with negative refractive power and includes four lenses. The second lens group is with positive refractive power and includes two lenses. The third lens group is with positive refractive power and includes a stop and six lenses.