Patent ID: 7656593
Filing Date: 2010-02-02
Classification: G02B

Abstract:
1. An imaging lens comprising a first junction type compound lens, an aperture diaphragm, a second junction type compound lens, and a third junction type compound lens, wherein said first junction type compound lens, said aperture diaphragm, said second junction type compound lens, and said third 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, the third junction type compound lens comprises a seventh lens, an eighth lens and a ninth lens arranged in this sequence from the object side to the image side, said first lens, said third lens, said fourth lens, said sixth lens, said seventh lens and said ninth lens are formed of a curable resin material, said second lens, said fifth lens and said eighth lens are formed of a high softening temperature glass material, said first lens and said second lens are directly bonded, said second lens and said third lens are directly bonded, said fourth lens and said fifth lens are directly bonded, said fifth lens and said sixth lens are directly bonded, said seventh lens and said eighth lens are directly bonded, and said eighth lens and said ninth lens are directly bonded, and the following conditions (1) to (12) are satisfied, where N N N ν ν ν N N N ν ν ν N N N ν ν ν