Patent ID: 8520124
Filing Date: 2013-08-27
Classification: G02B

Abstract:
1. An image pickup lens for forming an image of a subject onto a photoelectric conversion section of a solid-state image pickup element, the image pickup lens comprising, in order from an object side: an aperture stop; a first lens with positive refractive power, comprising a convex surface facing the object side; a second lens with negative refractive power, comprising a concave surface facing an image side; a third lens with positive refractive power, comprising a convex surface facing the image side; a fourth lens with positive refractive power, having a meniscus shape comprising a convex surface facing the image side; and a fifth lens with negative refractive power, comprising a concave surface facing the image side, wherein the image pickup lens satisfies the following conditional expressions: wherein r7 is a curvature radius of a surface facing the object side of the fourth lens, r8 is a curvature radius of the surface facing the image side of the fourth lens, SL is a distance on an optical axis from the aperture stop to a focal point at the image side, and f is a focal length of a total system of the image pickup lens.