IMAGING LENS

摘要

A low-cost, compact and low-profile imaging lens with relatively high brightness, which provides a wide angle of view of about 90 degrees and corrects various aberrations properly. It is designed for use in a solid-state image sensor and includes the following elements arranged in order from an object side to an image side: a first lens as a positive or negative double-sided aspheric lens having a convex object-side surface near an optical axis; an aperture stop; a positive second lens having a convex image-side surface; a negative third lens having a concave image-side surface; a positive fourth lens having a convex image-side surface; and a fifth lens as a negative meniscus lens having a concave image-side surface near the optical axis. It satisfies a conditional expression (1) below:;0.9

主权项

1. An imaging lens for a solid-state image sensor in which elements are arranged in order from an object side to an image side, comprising:
a first lens as a double-sided aspheric lens with positive or negative refractive power having a convex surface on the object side near an optical axis; an aperture stop; a second lens with positive refractive power having a convex surface on the image side; a third lens with negative refractive power having a concave surface on the image side; a fourth lens with positive refractive power having a convex surface on the image side; and a fifth lens as a meniscus lens with negative refractive power having a concave surface on the image side near the optical axis, wherein a conditional expression (1) below is satisfied:
0.9