Patent ID: 7218461

Claim:
An image pickup lens for forming image of a subject on a solid-state image pickup element comprising: a first lens having a positive refractive power in a meniscus shape whose convex surface faces to an object side of the image pickup lens; an aperture stop; a second lens having a positive refractive power in a meniscus shape whose convex surface faces to an image side of the image pickup lens; a third lens having a negative refractive power whose concave surface faces to an object side of the image pickup lens, wherein the first lens, the aperture stop, the second lens and the third lens are arranged in this order form an object side of the image pickup lens, and the image pickup lens satisfies following expressions: 0.20 <R 1 /f< 0.40 −3.0<( R 5 +R 6 )/( R 5 −R 6 )<0, where R 1 is a curvature radius of the object side of the first lens, f is a focal length of a total system of the image pickup lens, R 5 is a curvature radius of the object side of the third lens, and R 6 is a curvature radius of the image side of the third lens.