Patent ID: 8369028

Claim:
An imaging lens comprising: at least one lens block including a lens substrate that is a plane-parallel plate, and a lens contiguous with at least one of object-side and image-side substrate surfaces of the lens substrate, the lens exerting a positive or negative optical power; and an aperture stop restricting light amount, wherein said lens included in said lens block is formed of a material different from a material out of which said lens substrate is formed; wherein said lens block disposed at a most object-side position is a first lens block, the first lens block including, a first lens substrate, and a lens L[LS 1 o] contiguous with an object-side substrate surface of the first lens substrate, and wherein conditional formula (A1) below is fulfilled: 0 ≦DT [ LS 1 o−ape ]/ d [ LS 1]≦1 (A1) where DT[LS 1 o−ape] represents a distance from the object-side substrate surface of the first lens substrate to an aperture stop surface; and d[LS 1 ] represents a thickness of the first lens substrate along an optical axis, wherein the first lens block further includes, a lens L[LS 1 m] contiguous with an image-side substrate surface of the first lens substrate, and wherein conditional formula (A7) is fulfilled: −13 ≦HY [ L [ LS 1 m ] m ]/ HY [ L [ LS 1 o ] o ]≦−0.08 (A7) where HY[L[LS 1 m]m] represents a distance between the optical axis and a principal ray with a maximum image height which passes through an image-side lens surface of the lens L[LS 1 m]; and HY[L[LS 1 o]o] represents a distance between the optical axis and a principal ray with the maximum image height which passes through an object-side lens surface of the lens L[LS 1 o].