Image sensor and image-capturing device

An image sensor comprising:

• a pixel group including a plurality of pixels that receive light fluxes having passed through an image-capturing optical system, wherein:
• the pixel group includes first pixels, second pixels and third pixels respectively assuming first spectral sensitivity, second spectral sensitivity and third spectral sensitivity different from one another;
• a plurality of first pixel rows, each including a plurality of first pixels arranged one after another along a first direction, and a plurality of second pixel rows, each including a plurality of second pixels and a plurality of third pixels arranged at alternate positions along the first direction, are arranged at alternate positions along a second direction running perpendicular to the first direction;
• the first pixel rows are offset relative to the second pixel rows along the first direction by an extent approximately equal to a half pitch;
• a plurality of focus detection pixels assuming the first spectral sensitivity are arranged in place of at least some of the first pixels in at least some of the plurality of first pixel rows;
• and
• the plurality of focus detection pixels receive a pair of light fluxes having passed through a pair of areas of a pupil of the image-capturing optical system and output a pair of image signals corresponding to a pair of images formed with the pair of light fluxes.

An image sensor comprising:

• a pixel group including a plurality of pixels that receive light fluxes having passed through an image-capturing optical system., wherein:
• the pixel group includes first pixels, second pixels and third pixels respectively s assuming first spectral sensitivity, second spectral sensitivity and third spectral sensitivity different from one another;
• a plurality of pixel row sets, each containing a first pixel row including a plurality of first pixels arranged one after another along a second direction, a second pixel row arranged immediately rightward relative to the first pixel row and including a plurality of second pixels arranged one after another along the second direction, a third pixel row arranged immediately rightward relative to the second pixel row and including a plurality of first pixels arranged one after another along the second direction and a fourth pixel row arranged immediately rightward relative to the third pixel row and including a plurality of third pixels arranged one after another along the second direction, are set one after another along a first direction running perpendicular to the second direction;
• each pixel row among the first through fourth pixel rows is arranged with an offset relative to an adjacent pixel row by an extent equal to a half pitch along the second direction;
• a plurality of focus detection pixels assuming the first spectral sensitivity are arranged in place of at least some of the first pixels in at least some of the plurality of first pixel rows and the plurality of third pixel rows;
• and
• the plurality of focus detection pixels receive a pair of light fluxes having passed through a pair of areas of a pupil of the image-capturing optical system and output a pair of image signals corresponding to a pair of images formed with the pair of light fluxes.