Imaging device and imaging system outputting signals of light in different wavelength bands

An imaging device comprising:

• a plurality of pixels each including a photoelectric converter;
• an actuator configured to move the plurality of pixels along a direction of an optical axis;
• a focus control circuit configured to control a focal position of light incident on the plurality of pixels by driving the actuator;
• and
• a pixel control circuit configured to control charge accumulation in the photoelectric converters of the plurality of pixels, and readout of signals from the plurality of pixels,
• wherein the plurality of pixels includes a plurality of first pixels each configured to output a signal corresponding to light in a first wavelength band, and a plurality of second pixels each configured to output a signal corresponding to light in a second wavelength band that is different from the first wavelength band,
• wherein the pixel control circuit is configured to execute:
• a first period of accumulating charge in the photoelectric converters of the plurality of first pixels after the light in the first wavelength band is focused on the plurality of first pixels by driving the actuator;
• a second period of accumulating charge in the photoelectric converters of the plurality of second pixels after the light in the second wavelength band is focused on the plurality of second pixels by driving the actuator after the first period, and before a first signal corresponding to an amount of charge generated in the photoelectric converter of each of the plurality of first pixels is read out;
• and
• a third period of reading out the first signal corresponding to the amount of charge generated in the photoelectric converter of each of the plurality of first pixels and a second signal corresponding to an amount of charge generated in the photoelectric converter of each of the plurality of second pixels after the second period,
• wherein the first period, the second period, and the third period are executed during one frame.