Imaging lens

摘要

An imaging lens elements are arranged in order from an object side, an aperture stop, positive first lens having convex object-side and image-side surfaces, negative meniscus second lens having a concave image-side surface, positive third lens having at least one aspheric surface, positive double-sided aspheric fourth lens, and negative double-sided aspheric fifth lens having concave object-side and image-side surfaces with its image-side surface having a pole-change point off the axis. It satisfies conditional expressions below:
0.5

主权项

1. An imaging lens which forms an image of an object on a solid-state image sensor, in which elements are arranged in order from an object side to an image side, comprising:
an aperture stop; a first lens having positive refractive power and a convex surface near an optical axis on each of the object side and the image side; a second lens as a meniscus lens having negative refractive power and a concave surface on the image side; a third lens having positive refractive power and at least one aspheric surface; a fourth lens as a double-sided aspheric lens having positive refractive power; and a fifth lens as a double-sided aspheric lens having negative refractive power and a concave surface near an optical axis on each of the object side and the image side, the image-side surface of the fifth lens having a pole-change point in a position off the optical axis, wherein conditional expressions (1) to (3), (7) and (8) below are satisfied:
0.5