Image sensor and image capturing apparatus with focus detection pixels

摘要

An image sensor comprises a plurality of pixels covered by color filters and arranged two-dimensionally in a first direction and a second direction perpendicular to the first direction; and a read out means capable of reading by switching between a first read out method for reading a signal from each of the plurality of pixels and a second read out method for reading by adding signals in the first direction within each pixel group including a predetermined number of pixels covered by a color filter of a same color. The plurality of pixels include a plurality of pixel groups of first focus detection pixels and a plurality of pixel groups of second focus detection pixels, arranged discretely, and the first and second focus detection pixels are partially shielded from light on different sides in the second direction so as to receive light transmitted through different exit pupil regions.

主权项

1. An image sensor comprising:
a plurality of pixels covered by color filters and arranged two-dimensionally in a first direction and a second direction perpendicular to the first direction, wherein the plurality of pixels includes a plurality of pixel groups of first focus detection pixels and a plurality of pixel groups of second focus detection pixels; a read out unit that reads by switching between a first read out method of reading a signal from each of the plurality of pixels and a second read out method of reading signals on a row by row basis in the first direction while adding signals in the first direction within each pixel group including a predetermined number of pixels covered by a color filter of a same color and skipping signals in the second direction; and a detection unit configured to detect a focus state based on a phase difference in the second direction between two images obtained from signals read out from the first focus detection pixels and the second focus detection pixels, wherein the first focus detection pixels and the second focus detection pixels are partially shielded from light on different sides in the second direction so as to receive light transmitted through different exit pupil regions.