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:
Aug. 06, 2013
Filed:
Dec. 07, 2010
Hai-jo Huang, Taipei Hsien, TW;
Fang-ying Peng, Taipei Hsien, TW;
Sheng-an Wang, Taipei Hzien, TW;
Xiao-na Liu, Guangdong, CN;
Hai-Jo Huang, Taipei Hsien, TW;
Fang-Ying Peng, Taipei Hsien, TW;
Sheng-An Wang, Taipei Hzien, TW;
Xiao-Na Liu, Guangdong, CN;
Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Shenzhen, CN;
Hon Hai Precision Industry Co., Ltd., New Taipei, TW;
Abstract
A relay lens is used for an imaging system having a main lens. The main lens has a pupil plane. The relay lens, in the order from the subject side to the image side thereof, includes a first lens of negative refractive power, and a second lens of positive refractive power. The first lens has a first principal plane and a second principal plane. The second lens has a third principal plane and a fourth principal plane. The relay lens system satisfies the following formulas: 0.53<|ƒ1/ƒ2|<0.57; 1.54<ν1/ν2<3.11; 0.22<D1/D2<0.65, where f1 and f2 are the effective focal lengths of the first and second lenses, v1 and v2 are the Abbe numbers of the first and second lenses, D1 is the distance between the second principal plane and the third principal plane, D2 is the distance between the fourth principal plane and the pupil plane.