Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Chun-Hsiang Huang0
Chun-Ling Lin0
Chung Lee0
Date of Patent
October 28, 2008
0Patent Application Number
119529620
Date Filed
December 7, 2007
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A lens system comprises a first lens positive in power, a second lens positive in power, a third lens negative in power, a fourth lens positive in power, and a fifth lens negative in power. The lens system meets a criteria of 1.6<TT/f<1.8, 1.6<f/f2<1.8, and −0.6<f/f5<−0.4, wherein TT denotes a distance between an object-side surface of the first lens and an image plane of the lens system; f2 denoting an effective focal length of the second lens; f denoting an effective focal length of the entire lens system.
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