Image pickup apparatus and image pickup device for performing auto-focusing

摘要

An image pickup apparatus includes: an image pickup device that includes a pixel used for focus detection, a plurality of the pixels being arranged in a matrix; a correction memory that stores correction information used for correcting a difference in amounts of received light that depend on pixel positions of the pixels used for focus detection; a correcting section that reads the correction information to correct a pixel value of the pixel used for focus detection; and a focus detecting section that detects a focal point by using the pixel value corrected by the correcting section. Focus accuracy is increased by correcting the pixel value for an AF pixel depending on the pixel position.

主权项

1. An image pickup apparatus, comprising:
an image pickup device including a plurality of pixels arranged in a matrix, the pixels including an image pickup pixel and pixel for focus detection, the pixels each comprising:
a light receiving area on which light from a taking lens impinges; anda microlens that directs light from the taking lens to the light receiving area, wherein plural types of pixels for focus detection are provided in association with a plurality of assumed design pupil positions, and an end of the light receiving area of the pixel for focus detection is defined in association with a positional relationship between the design pupil position and the microlens, wherein the design pupil positions are positions of assumed exit pupils; a pupil position determining section that determines a pixel for focus detection to be used for focus detection by comparing an exit pupil position with the plurality of design pupil positions; a correcting section that corrects an image signal from the pixel for focus detection to be used for focus detection when the exit pupil position is inconsistent with the design pupil position, based on information on an exit pupil, information of the design pupil position, and information of the pixel for focus detection to be used for focus detection to obtain a corrected image signal; and a focus detecting section that detects a focal point by using the corrected image signal corrected by the correcting section.