Imaging apparatus

Abstract

An imaging apparatus includes an image pickup device that includes a first pixel group configured to photoelectrically convert an object image formed by a luminous flux from an imaging optical system, and a second pixel group which includes a plurality of pixels configured to photoelectrically convert a split pair of the luminous flux from the imaging optical system and a detecting unit configured to implement a first detection control that changes an imaging state of the image pickup device while detecting a contrast of the object image based on an output of the second pixel group, and then a second detection control that changes the imaging state of the image pickup device while detecting the contrast of the object image based on an output of the first pixel group.

Description

technical field [0001] The present invention relates to imaging equipment such as digital still cameras and video cameras, and more particularly to imaging equipment performing focus control by using output from the imaging device. Background technique [0002] Japanese Patent Laid-Open ("JP") No. 2000-156823 discloses an imaging apparatus configured to use the optical characteristics of a part of pixels different from other pixels in the imaging device of the imaging apparatus, and to The output implements focus detection. [0003] In the imaging apparatus disclosed in JP2000-156823, multiple focus point detection pixels are arranged in a part of the imaging device. Figure 6 An exemplary pixel arrangement of an imaging device in which focus detection pixels are arranged in a part of rows in a pixel matrix is ​​shown. [0004] exist Figure 6 Among them, R, G and B are common camera pixels equipped with red filter, green filter and blue filter respectively. S1 and S2 are ...

AI Technical Summary

Problems solved by technology

[0017] However, since the two images formed on the first and second focus detection pixels are asymmetrical to each other as the amount of defocus increases, it is difficult for the imaging apparatus disclosed in JP2000-156823 to properly obtain the phase difference or the amount of defocus

[0018] JP2001-305415 discloses an image pickup apparatus that applies a contrast detection method to focus control when the amount of defocus obtained using the phase difference method is unreliable, however, this document does not disclose the appropriate use of pixels using focus detection Focus control of the contrast detection method and focus control of the contrast detection method using pixels other than focus detection pixels

Images