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:
Apr. 10, 2018
Filed:
Dec. 10, 2014
Applicants:
Ching-sheng Chang, Hsinchu, TW;
Yen-te Lee, Hsinchu, TW;
Kuo-chuan Wang, Hsinchu, TW;
Inventors:
Assignee:
Young Optics Inc., Hsinchu, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 9/64 (2006.01); G02B 13/00 (2006.01); G02B 17/08 (2006.01); G02B 13/06 (2006.01);
U.S. Cl.
CPC ...
G02B 9/64 (2013.01); G02B 13/006 (2013.01); G02B 13/0045 (2013.01); G02B 13/06 (2013.01); G02B 17/08 (2013.01);
Abstract
An optical lens including a first lens group and a second lens group is provided. The first lens group is disposed between a magnified side and a reduced side and has a negative refractive power. The first lens group includes four lenses. Two lenses closest to the magnified side in the first lens group are aspheric lenses. The second lens group is disposed between the first lens group and the reduced side and has a positive refractive power. The second lens group includes at least seven lenses.