Imaging lens, and imaging apparatus and mobile terminal apparatus using the same
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United States of America Patent
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Oct 19, 2010
Grant Date -
Mar 4, 2010
app pub date -
Dec 21, 2007
filing date -
Dec 22, 2006
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An imaging lens comprises a first lens (L1), a second lens (L2), a third lens (L3), and a fourth lens (L4), which are arranged in ascending sequence, starting from the lens nearest to the object. The first lens (L1) has a double-convex shape and positive refractive power. The second lens (L2) has a double-concave shape and negative refractive power. The third lens (L3) has a meniscus shape with its convex surface facing an image plane, and has positive refractive power. The fourth lens (L4) has a meniscus shape with its convex surface facing the object. A chromatic aberration occurred in the first lens (L1) is corrected by the second lens (L2). A chromatic aberration occurred in the third lens (L3) is corrected by the fourth lens (L4).
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