Optical lens
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United States of America Patent
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Oct 31, 2017
Grant Date -
Apr 28, 2016
app pub date -
Oct 14, 2015
filing date -
Oct 22, 2014
priority date (Note) -
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Abstract
An optical lens includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens arranged sequentially along an optical axis from an magnified side to a minified side. A center thickness of the first lens is TH1, a center thickness of the second lens is TH2, a center thickness of the third lens is TH3, a center thickness of the fourth lens is TH4, a center thickness of the fifth lens is TH5, and an effective focal length of the optical lens is EFL, wherein the optical lens fits at least one of the following conditions: (1) 0.52<(TH1+TH2+TH3)/EFL<1.0; (2) 0.5<(TH3+TH4+TH5)/EFL<0.65; and (3) (TH1+TH2+TH3)/(TH3+TH4+TH5)>1.20. The optical lens can reduce aberration and has high resolution.
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