Imaging lens
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United States of America Patent
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Aug 29, 2017
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N/A
app pub date -
Aug 27, 2015
filing date -
Jan 10, 2014
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Abstract
An imaging lens includes a first lens group having positive refractive power; a second lens group having negative refractive power; and a third lens group having negative refractive power, arranged in this order from an object side to an image plane side. The first lens group includes a first lens having positive refractive power, a second lens having negative refractive power, and a third lens having positive refractive power. The second lens group includes a fourth lens and a fifth lens. The third lens group includes a sixth lens having negative refractive power and a seventh lens.
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