Patent ID: 8456564

Claim:
An imaging lens, comprising, in order from an object side: a first lens having a positive refracting power; a second lens having a concave shape toward an object side; and (i−2) number of lens, where i is an integer equal to 3 or more, wherein an i-th lens, which is counted from the object side, is on the most image side and includes: an i-th lens flat plate; and an if-th lens element which is formed on an object-side surface of the i-th lens flat plate, has a different refractive index than the i-th lens flat plate, and has a convex shape toward the object side at a position where a principal ray of a maximum image height passes through, wherein the following relationship is satisfied: 0.01 <Di/Dt< 0.15 (A) where: Di is an optical axis distance, which is a lens interval, between an (i−1)th lens counted from the object side and the i-th lens; and Dt is an optical axis distance, which is an overall optical distance, from an object-side surface of the first lens and an image plane.