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:
Jun. 19, 2012
Filed:
Sep. 22, 2010
Applicants:
Chao-yi Yeh, Miao-Li Hsien, TW;
Jyh-long Chern, Miao-Li Hsien, TW;
Inventors:
Chao-Yi Yeh, Miao-Li Hsien, TW;
Jyh-Long Chern, Miao-Li Hsien, TW;
Assignee:
Foxsemicon Integrated Technology, Inc., Chu-Nan, Miao-Li Hsien, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 3/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A projection lens comprises, from a long conjugate side to a short conjugate side, a first lens unit with positive optical power, a second lens unit with negative optical power, and a third lens unit with negative optical power. The first lens unit is configured for correcting chromatic aberration of the projection lens. The third lens unit comprises a meniscus lens which is convex toward to the short conjugate side of the projection lens.