Imaging lens
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United States of America Patent
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Aug 21, 2017
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Aug 29, 2016
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Abstract
An imaging lens includes a first lens having positive refractive power; a second lens having negative refractive power; a third lens having positive refractive power; a fourth lens having positive refractive power; a fifth lens; and a sixth lens having negative refractive power, arranged in this order from an object side to an image plane side. The second lens is formed in a shape so that surfaces on the both sides have positive curvature radii. The sixth lens is formed in a shape so that surfaces on the both sides have negative curvature radii. The fourth lens is arranged to be away from the fifth lens by a specific distance on an optical axis, and the imaging lens has a specific angle of view so that specific conditional expressions are satisfied.
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