Patent ID: 8023202

Claim:
An imaging lens, comprising a first diaphragm, a first junction type compound lens, a second diaphragm, and a second junction type compound lens, characterized in that said first diaphragm, said first junction type compound lens, said second diaphragm and said second junction type compound lens are arranged in this sequence from an object side to an image side, said first junction type compound lens comprises a first lens, a second lens and a third lens arranged in this sequence from the object side to the image side, said second junction type compound lens comprises a fourth lens, a fifth lens and a sixth lens arranged in this sequence from the object side to the image side, said first lens, said third lens, said fourth lens and said sixth lens are formed of a curable resin material, said second lens and said fifth lens are formed of a high softening temperature optical glass material, said first lens and said second lens are bonded with adhesive, said second lens and said third lens are bonded with adhesive, said fourth lens and said fifth lens are bonded with adhesive, and said fifth lens and said sixth lens are bonded with adhesive, and the following Conditions (1) to (8) are satisfied: 0 ≦|N 3 −N 2 |≦0.1 (1) 0 ≦|N 3 −N 4 |≦0.1 (2) 0 ≦|v 3 −v 2 |≦30.0 (3) 0 ≦|v 3 −v 4 |≦30.0 (4) 0 ≦|N 9 −N 8 |≦0.1 (5) 0 ≦|N 9 −N 10 |≦0.1 (6) 0 ≦|v 9 −v 8 |≦30.0 (7) 0 ≦|v 9 −v 10 |≦30.0 (8) where N 2 : refractive index of said first lens N 3 : refractive index of said second lens N 4 : refractive index of said third lens v 2 : Abbe number of said first lens v 3 : Abbe number of said second lens v 4 : Abbe number of said third lens N 8 : refractive index of said fourth lens N 9 : refractive index of said fifth lens N 10 : refractive index of said sixth lens v 8 : Abbe number of said fourth lens v 9 : Abbe number of said fifth lens v 10 : Abbe number of said sixth lens.