Patent ID: 7948689

Claim:
An image pickup lens, comprising sequentially from an object side: an aperture stop, a first lens, and a second lens, wherein the first lens is a positive meniscus lens which has a convex surface at the object side and a concave surface at an image side opposite to the object side, the second lens has a concave surface at the object side and an image side surface whose radius of curvature on an paraxial region is infinite or a negative value, and the image side surface of the second lens includes an aspheric surface to make a positive power strong toward a lens peripheral region, and wherein the image pickup lens is made to satisfy the following conditional formulas: 1.55<n1<1.80 (1) 0.4 <D 3 /f< 0.6 (2) 40.0<ν2<90.0 (3) where n1 represents a refractive index of the first lens ford spectral line, D3 represents a thickness (mm) of the second lens on an optical axis, f represents a focal distance (mm) of an entire system of the image pickup lens, and ν2 represents of an Abbe's number of the second lens.