Patent ID: 8054562

Claim:
An imaging lens comprising: a first lens that is made of glass, has a negative power and includes a concave surface facing an image side; a second lens having a positive power; a third lens having a negative power; a fourth lens having a positive power; a fifth lens that has a positive power and includes a convex surface facing the image side; a sixth lens having a negative power; and a stop positioned in rear of the second lens or the third lens, wherein the first to sixth lenses are arranged in this order from an object side, and when the curvature radius of an image-side surface of the third lens is R 3 r and the curvature radius of an object-side surface of the fourth lens is R 4 f , the imaging lens satisfies the following conditional expression: | R 3 r/R 4 f|< 1.0; wherein the Abbe number of the fourth lens with respect to the d-line is equal to or greater than 35, the Abbe number of the fifth lens with respect to the d-line is equal to or greater than 35, and the Abbe number of the sixth lens with respect to the d-line is equal to or less than 30.