Micro-camera lens system
Title：
Micro-camera lens system
Application Number：
 200410051451
Application Date：
 2004/09/08
Announcement Date：
 2006/03/15
Pub. Date：
Publication Number：
 1746716
Announcement Number：
Grant Date：
Granted Pub. Date：
ApplicationType：
 Invention
State/Country：
 11[China|beijing]
IPC：
 G02B 13/18, G02B 1/04, H04N 5/225
Applicant(s)：
 Tsinghua Univ.
Inventor(s)：
 Zeng Jiyong, Yan Yingbai, Jin Guofan, Wang Minqiang, Wang Zhuo
Key Words：
 Micro-camera lens system
Abstract：
 A micro video camera lens system consists of shutter and meniscus shaped thick lens with its concave surface towards to objective side and its convex surface towards to imaging surface. It is featured as using no spherical surface as surface towards to objective side and using convex surface with diffraction grating as surface towards to imaging surface, applying condition formula of ( 1 ) 0.1£¼R2 / R1 £¼0.5 for said system whether R1 ¨C curvity of surface top near to objective side and R2 ¨C curvity of surface top near to imaging surface.
Claim：
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PCT：
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2008-4-17
  Selected patents owned by Tsinghua University filed in 2005 are loaded.
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