Imaging lens and imaging apparatus
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United States of America Patent
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Feb 3, 2015
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N/A
app pub date -
Sep 17, 2013
filing date -
Mar 18, 2011
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Abstract
An imaging lens has a negative first-lens, a first-cemented-lens of a second-lens and a third-lens, a stop, a positive fourth-lens, and a second-cemented-lens of a fifth-lens and a sixth-lens in this order from an object-side. The first-lens has a plano-concave or meniscus shape with a concave image-side surface. One of the second-lens and the third-lens is a positive lens and the other one is a negative lens. An object-side surface of the fourth-lens is a flat surface or a surface with a curvature radius having an absolute value greater than that of its image-side surface. One of the fifth-lens and the sixth-lens is a positive lens and the other one is a negative lens.
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