Patent ID: 8259210
Filing Date: 2012-09-04
Classification: G02B

Abstract:
1. An imaging lens used in an imaging apparatus that corrects a blur in an image by performing contrast recovery processing on original image data obtained by imaging, wherein the spherical aberration of the imaging lens changes from an object point side of an image plane base position toward the other side of the image plane base position as a distance from the optical axis of the imaging lens increases, and wherein the following formulas (1) and (2) are satisfied: a: the magnitude of spherical aberration from the image plane base position toward the object point side thereof, the spherical aberration affecting a ray passing through a central part of the pupil of the imaging lens, b: a sum of a maximum spherical aberration from the image plane base position toward the object point side thereof and a maximum spherical aberration from the image plane base position toward the other side of the image plane base position, and f: the focal length of the imaging lens.