Patent ID: 8902513

Claim:
An image pickup lens for a solid-state imaging element, comprising, in order from an object side to an image side, an aperture stop, a first lens of a meniscus shape having a positive refractive power with a convex surface facing the object side, a second lens having a positive refractive power with a concave surface facing the object side, and a third lens having a negative refractive power with a convex surface facing the object side near an optical axis, wherein the third lens is designed so that both surfaces thereof are aspheric, having at least one pole-change point on the object side surface and the image side surface, and wherein following conditional expressions (1) through (4) are satisfied: TTL< 3.0 (1) 0.80 <f 1 /f< 0.93 (2) 0.35 <bf/TTL< 0.42 (3) 0.70 <TTL /(2 IH )<0.85 (4) where TTL represents a length along the optical axis from the surface closest to the object side to an image plane when filters and the like arranged between the third lens and the imaging elements are removed (air-converted distance), f represents a focal length of an overall optical system of the image pickup lens, f1 represents a focal length of the first lens, bf represents a length along the optical axis from the image-side surface of the third lens to the image plane when filters and the like arranged between the third lens and the imaging elements are removed (back focus (air-converted distance)), and IH represents a maximum image height.