Patent ID: 6985309

Claim:
An imaging lens comprising four lens components, arranged in order from the object side, as follows: a first lens component of negative refractive power, having an aspheric surface on the image side that is concave near the optical axis, and having an aspheric surface on the object side; a second lens component of positive refractive power and having a convex surface on the object side; a third lens component of positive refractive power and that includes, in order from the object side, a lens element of positive refractive power and a lens element of negative refractive power; a fourth lens component having a surface on the object side that is convex near the optical axis, and having an aspheric surface on the image side that is convex near the optical axis and that becomes concave at the periphery; wherein the following condition is satisfied: −1.0<( P 1 + P 5 )/ P<− 0.4 where P 1 is the refractive power of said first lens component, P 5 is the refractive power of said fourth lens component, and P is the refractive power of the imaging lens.