Image pickup lens, image pickup apparatus and mobile terminal
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United States of America Patent
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Jan 6, 2009
Grant Date -
Oct 18, 2007
app pub date -
Apr 10, 2007
filing date -
Apr 13, 2006
priority date (Note) -
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Abstract
The present invention provides an image pickup lens for forming a light flux from a subject into an image on an image pickup element, and the image pickup lens includes, in order from an object side thereof: an aperture stop; a first lens having a positive refractive power; a second lens having a negative refractive power and comprising a concave surface facing an image side of the image pickup lens; a third lens having a positive refractive power; and a fourth lens having a negative refractive power and comprising a concave surface facing the image side. The image pickup lens satisfies the predetermined condition according to a curvature radius of the surface facing the image side on the second lens, and a focal length of the image pickup lens.
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