Patent ID: 8130455
Filing Date: 2012-03-06
Classification: G02B

Abstract:
1. An image pickup lens for forming an image of an object on a photoelectrical converter of a solid-state image pickup element, the image pickup lens comprising, in order from an object side thereof: a first lens in a meniscus shape having a positive refractive power and comprising a convex surface facing the object side; a second lens having a negative refractive power and comprising a concave surface facing an image side of the image pickup lens; a third lens in a meniscus shape having a positive refractive power and comprising a convex surface facing the image side; and a fourth lens having a negative refractive power and comprising a concave surface facing the image side, at least one surface of the fourth lens being in an aspheric shape, wherein the image pickup lens satisfies the following expression: where f f is a focal length of a total system of the image pickup lens.