Patent ID: 8363339
Filing Date: 2013-01-29
Classification: G02B

Abstract:
1. An imaging lens comprising: at least one lens block including an aperture stop restricting light amount, wherein said lens included in said lens block is formed of a material different from a material of which said lens substrate is formed; wherein said lens block comprises a first lens block disposed at a most object-side position, the first lens block exerting a positive optical power, wherein said lens block comprises at least one lens block in which said lens is contiguous only with one of the object-side and image-side substrate surface of said lens substrate, wherein conditional formula (D1) below is fulfilled: where f[BK1] represents a focal length of the lens block; and f[all] represent a focal length of the entire imaging lens, where in the first lens block includes, as said lens substrate, a first lens substrate and, as said lens, a lens L[LS1o] contiguous with an object-side substrate surface of the first lens substrate, an object-side surface of the lens L [LS1o] being convex to object side, and wherein conditional formula (D3) below is fulfilled: where ν[LS1] represnts an Abbe number of the first lens substrate; and ν[L[LS1o]] represnts an Abbe number of the lens L[LS1o].