Image pickup lens

摘要

There is provided an image pickup lens having a 6-element structure which has a small size and a sufficiently lens speed of F/2 or less and in which various aberrations are corrected favorably. This image pickup lens includes a first lens having a positive refractive power and comprising a convex surface directed to the object side; a second lens having a negative refractive power and comprising a concave surface directed to the image side; a third lens having a positive or negative refractive power; a fourth lens having a positive refractive power; a fifth lens having a positive refractive power and comprising a convex surface directed to the image side; and a sixth lens having a negative refractive power and comprising a concave surface directed to the image side, in this order from the object side, wherein the image side surface of the sixth lens has an aspherical shape and an inflection point at a position other than an intersection point with the optical axis, and the image pickup lens satisfies the following conditional expressions.
νd1>50νd2≦30
where,
νd1 is an Abbe number of the first lens, andνd2 is an Abbe number of the second lens.

主权项

1. An image pickup lens for forming an image of a subject on a photoelectrical conversion part of a solid-state image sensor, comprising,
in order from an object side thereof: a first lens having a positive refractive power and comprising a convex surface directed to an object side; a second lens having a negative refractive power and comprising a concave surface directed to an image side; a third lens having a positive or negative refractive power; a fourth lens having a positive or negative refractive power; a fifth lens having a positive refractive power and comprising a convex surface directed to the image side; and a sixth lens having a negative refractive power and comprising a concave surface directed to the image side, wherein an image side surface of the sixth lens comprises an aspherical shape and an inflection point at a position other than an intersection point with an optical axis, and the image pickup lens satisfies the following conditional expressions,
νd1>50νd2≦30where,
νd1 is an Abbe number of the first lens, and νd2 is an Abbe number of the second lens.