Patent ID: 7755853

Claim:
An imaging lens comprising: in order from an object side of the imaging lens, a first lens having a positive refractive power and having a convex surface on the object side; a second lens having a negative refractive power and having a concave surface on the object side; a third lens having a positive refractive power; and a fourth lens of a meniscus lens having a negative refractive power and having a convex surface on the object side, the imaging lens satisfying conditional expressions: 0.6 <f 1/ f <1.0 (1) 1.45<n1<1.6 (2) v1>60 (3) 0.4 <|f 2/ f |<1.2 (4) 0.7 <f 3/ f <1.9 (5) wherein f represents a focal length of the imaging lens; f 1 represents a focal length of the first lens; n 1 represents a refractive index of the first lens at the d-line; v 1 represents an Abbe number of the first lens at the d-line; f 2 represents a focal length of the second lens; and f 3 represents a focal length of a third lens, wherein an absolute value of a radius of curvature of an object side surface of the third lens in the vicinity of the optical axis is smaller than that of an image side surface of the third lens in the vicinity of the optical axis.