Patent ID: 8064147
Filing Date: 2011-11-22
Classification: B82Y,G02B,Y10T

Abstract:
1. An imaging lens, comprising: at least three lens blocks each including an aperture stop restricting light amount, wherein, in each of said lens blocks, said lens is formed of a material different from a material of which said lens substrate is formed; wherein said lens blocks comprise a first lens block disposed at a most object-side position; wherein the first lens block includes, as said lens substrate, a first lens substrate, and as said lens, a lens L[LS wherein an object-side lens surface of the lens L[LS wherein the first lens block excerts a positive optical power; wherein said lens blocks comprise a second lens block disposed to an image side of the first lens block; wherein the second lens block includes, as said lens substrate, a second lens substrate, and as said lens, a lens L[LS wherein an object-side lens surface of the lens L[LS wherein said lens blocks comprise a third lens block disposed to an image side of The second lens block; wherein the third lens block includes, as said lens substrate, a third lens substrate, And as said lens, a lens contiguous with at least one of object-side and image-side substrate surfaces of the third lens substrate, the lens being a lens L[Ls wherein at least one of an object-side lens surface of the lens L[Ls wherein conditional formula (B1) below is fulfilled; where f[L[LS f[all] reprsents a focal length of the entire imaging lens.