Patent ID: 9237260
Filing Date: 2016-01-12
CPC Classification: G02B,H04N

Claim Text:
1. An imaging apparatus comprising: a photographic optical system having an aberration control element for generating a predetermined aberration, for forming an optical image; an image sensor for generating an image signal corresponding to the optical image; and an image processing unit for carrying out, based on the predetermined aberration, image processing on the image signal in order to improve image characteristics having degraded due to the predetermined aberration, wherein the aberration control element sets a response of an optical transfer function to at least a predetermined subject distance in the photographic optical system to be zero at a first spatial frequency below Nyquist frequency of the image sensor and positions both a field distance of a maximum pupil height of a spherical aberration curve of the photographic optical system and a field distance of an inflection point proximate to the maximum pupil height on either a plus side or a minus side with respect to a field distance of the pupil height of zero.