Patent ID: 7453654

Claim:
An imaging lens comprising: in order from an object side of the imaging lens, a first lens of a positive lens having a convex surface on the object side thereof; a second lens of a negative lens in a meniscus shape having a concave surface on an image side thereof; a third lens of a positive lens in a meniscus shape having a convex surface on the image side thereof; and a fourth lens of a positive or negative lens, wherein both surfaces of the fourth lens are aspheric and the fourth lens has a concave surface on the image side in a vicinity of an optical axis of the fourth lens, wherein the imaging lens satisfies formulae (1) to (4): vd1>50 (1) vd2<30 (2) |f2/f1|>1 (3) 0.5<|f3/f4|<1.5 (4) wherein vd 1 represents an Abbe number of the first lens; vd 2 represents an Abbe number of the second lens; f 1 represents a focal length of the first lens; f 2 represents a focal length of the second lens; f 3 represents a focal length of the third lens; and f 4 represents a focal length of the fourth lens.