Patent ID: 7595939

Claim:
An imaging lens comprising: a first lens having a biconvex shape in a vicinity of an optical axis; a second lens having a concave surface facing a object side, the second lens having a negative refractive power; and a third lens having a positive or negative refractive power and having a meniscus shape containing, in a vicinity of the optical axis, a convex surface facing the object side, wherein: the first lens, the second lens and the third lens are arranged in order from the object side, at least one of surfaces of the first to third lenses is aspherical, and the following conditional expression is satisfied: 0.7 <f 1 /f< 1.3 0.2 ≦D 2 /f< 0.5 where f denotes a focal length of the entire system of the imaging lens, f 1 denotes a focal length of the first lens and D 2 denotes an interval on the optical axis between the first lens and the second lens, wherein, in said imaging lens, there is no lens, between said first and second lenses, contributing to said focal length f.