Patent ID: 7295386

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 a negative power; a third lens having a 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 satisfies conditional expressions (1) to (5): 0.7 <f 1 /f <1.1 (1) 1.45<n1<1.6 (2) ν1>60 (3) 0.8 <|f 2 /f 51 <1.8 (4) 1.9 <f 3 /f <20 (5) wherein f1 designates a focal length of the first lens; f designates a total focal length; n1 designates a refractive index of the first lens at the d-line; ν1 designates an Abbe number of the first lens at the d-line; f2 designates a focal length of the second lens; and f3 designates a focal length of the third lens.