OPTICAL LENS
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United States of America Patent
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Issued Date -
Sep 15, 2016
app pub date -
Dec 8, 2015
filing date -
Mar 10, 2015
priority date (Note) -
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Abstract
This invention provides an optical lens, which comprises, in order from an object side to an image-forming side, a first lens group having positive refractive power and a second lens group having negative refractive power. The first lens group includes: in order from the object side to the image-forming side, a first lens having refractive power and a second lens having refractive power. The second lens group includes: in order from the object side to the image-forming side, a third lens having refractive power and a fourth lens having refractive power, wherein the fourth lens has a concave surface toward the object side.
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