Patent ID: 7502181

Claim:
An imaging lens comprising: in order from an object side of the imaging lens, a first lens of a positive lens with a convex surface directed to the object side thereof; a second lens having a negative refractive power and having a meniscus shape with a concave surface directed to an image side thereof; a third lens having a positive refractive power and having a meniscus shape with a convex surface directed to the image side thereof; a fourth lens with both surfaces being an aspheric surface, the fourth lens having a concave surface on the image side in the proximity of an optical axis thereof; and a fifth lens of a positive or negative lens with both surfaces being an aspheric surface, wherein the imaging lens satisfies conditional expressions: vd1>50 (1) vd2<30 (2) vd4<30 (3) wherein vd 1 is an Abbe number of the first lens, vd 2 is an Abbe number of the second lens, and vd 4 is an Abbe number of the fourth lens.