Patent ID: 7535658

Claim:
An imaging lens comprising: in order from an object side of the imaging lens, a first lens having a convex surface on the object side and having a positive power; a second lens having a concave surface on the object side and having negative power; a third lens having positive power; and a fourth lens having a convex surface on the object side near a paraxial axis and having a meniscus shape, wherein the imaging lens has an air distance between the first lens and the second lens, and the imaging lens satisfies conditional expression (5): 1.9 <f 3 /f< 20 (5) wherein f designates a total focal length: and f 3 designates a focal length of the third lens, and wherein each of the second to fourth lenses is made of a resin material, the imaging lens further satisfying conditional expression (1): 0.7 <f 1 /f< 1.1 (1) wherein f 1 designates a focal length of the first lens.