Patent ID: 7345830

Claim:
An imaging lens comprising, in order from an object side of the imaging lens: a first lens of a positive lens; a second lens of a negative lens; a third lens, both surfaces of which are aspheric surfaces, wherein an image-side surface of the third lens has an extreme point at a position other than an optical axis of the imaging lens; and a fourth lens, both surfaces of which are aspheric surfaces, wherein an object-side surface of the fourth lens has an extreme point at a position other than the optical axis, wherein the imaging lens satisfies Conditional Expressions (1) and (2): R 3R >R 4F >0 (1) PH 3R >PH 4F (2) wherein R 3R represents a radius of curvature at a center of the image-side surface of the third lens; R 4F represents a radius of curvature at a center of the object-side surface of the fourth lens; PH 3R represents a distance from the optical axis to the extreme point on the image-side surface of the third lens; and PH 4F represents a distance from the optical axis to the extreme point on the object-side surface of the fourth lens.