Patent ID: 8913175

Claim:
An image sensing element that outputs signals of images for performing a correlation calculation to detect a focus state of a photographing lens, the image sensing element comprising: a first pixel line configured to include a first plurality of focus state detection pixels, each of the first plurality of focus state detection pixels having a separate aperture shifted by a first amount from a center of each pixel, arranged in a direction of the shift; a second pixel line configured to include a second plurality of focus state detection pixels, each of the second plurality of focus state detection pixels having a separate aperture shifted by a second amount in each pixel with respect to a position, in each pixel, of the aperture of a corresponding one of the first plurality of focus state detection pixels, arranged in the direction of the shift; a third pixel line configured to include a third plurality of focus state detection pixels, each of the third plurality of focus state detection pixels having a separate aperture shifted by a third amount in each pixel with respect to the position, in each pixel, of the aperture of a corresponding one of the first plurality of focus state detection pixels, arranged in the direction of the shift; and a fourth pixel line configured to include a fourth plurality of focus state detection pixels, each of the fourth plurality of focus state detection pixels having a separate aperture shifted by a fourth amount in each pixel with respect to a position, in each pixel, of the aperture of a corresponding one of the second plurality of focus state detection pixels, arranged in the direction of the shift, wherein the first plurality of focus state detection pixels and the second plurality of focus state detection pixels form images, respectively, which are used for the correlation calculation, wherein the third plurality of focus state detection pixels and the fourth plurality of focus state detection pixels form images, respectively, which are used for the correlation calculation, and wherein the first, second, and third amounts, or the first, second, and fourth amounts are different from one another.