Taking lens system
Title：
Taking lens system
Application Number：
 200410027254
Application Date：
 2004/05/15
Announcement Date：
 2005/11/16
Pub. Date：
 2007/07/25
Publication Number：
 1696758
Announcement Number：
 1328609
Grant Date：
 2007-7-25
Granted Pub. Date：
 2007-7-25
ApplicationType：
 Invention
State/Country：
 11[China|beijing]
IPC：
 G02B 13/18, G02B 9/04
Applicant(s)：
 Tsinghua Univ.
Inventor(s)：
 Jin Guofan, Wang Minqiang, Wang Zhuo, Yan Yingbai, Zeng Jiyong
Key Words：
 Taking lens system
Abstract：
 A video camera lens system sets shutter, the first lens with double convex surfaces and the second lens with moon shaped concave surface being bended towards to object side in sequence from object side to imaging face. At least one surface of both the first lens and the second lens is prepared as aspheric surface satisfying condition formula of ( 1 ) 1 < T / f < 1.62 and ( 2 ) 0.5 < f L / f < 0.9 where T - distance between shutter and image face, f - focal distance of complete video camera lens and f 1 - focal distance of the first lens.
Claim：
Priority：
PCT：
LegalStatus：

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  Selected patents owned by Tsinghua University filed in 2005 are loaded.
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