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:
Mar. 18, 2014
Filed:
Oct. 13, 2011
Kuo-chuan Wang, Hsinchu, TW;
Yi-hao Kang, Hsinchu, TW;
Chi-tang Hsieh, Hsinchu, TW;
Chia-chang Lee, Hsinchu, TW;
Kuo-Chuan Wang, Hsinchu, TW;
Yi-Hao Kang, Hsinchu, TW;
Chi-Tang Hsieh, Hsinchu, TW;
Chia-Chang Lee, Hsinchu, TW;
Young Optics Inc., Hsinchu, TW;
Abstract
A projection lens for projecting an image beam is provided. The image beam is converted by a light valve from an illumination beam irradiating the light valve. The projection lens includes a first lens group, a second lens group, and a third lens group. The first lens group is disposed on a transmission path of the image beam, and has a first optical axis. The second lens group is disposed on both a transmission path of the illumination beam and the transmission path of the image beam, and between the light valve and the first lens group. The second lens group has a second optical axis. The second optical axis is inclined with respect to the first optical axis. The third lens group is disposed on the transmission path of the image beam, and between the first lens group and the second lens group. A projection apparatus is also provided.