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:
May. 28, 2013
Filed:
Nov. 08, 2011
Xiao-na Liu, Guangdong, CN;
Hai-jo Huang, New Taipei, TW;
Fang-ying Peng, New Taipei, TW;
An-tze Lee, New Taipei, TW;
Sheng-an Wang, New Taipei, TW;
Xiao-Na Liu, Guangdong, CN;
Hai-Jo Huang, New Taipei, TW;
Fang-Ying Peng, New Taipei, TW;
An-Tze Lee, New Taipei, TW;
Sheng-An Wang, New Taipei, TW;
Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Shenzhen, CN;
Hon Hai Precision Industry Co., Ltd., New Taipei, TW;
Abstract
A projection lens system includes, in order from the magnified side to the reduced side thereof, a first lens group with negative refractive power, a second lens group with a positive refracting power, and a spatial light modulator. The projection lens system satisfies the following condition: 3.478<BFL/F<3.528. Wherein: BFL is a back focal length of the projection lens system; F is an effective focal length of the projection lens system.