Image sensor and image capturing apparatus for satisfactory pupil division by a focus detection pixel in which a light guide is formed

摘要

An image capturing apparatus comprises an image sensor including a plurality of image forming pixels and a lens which is arranged for the plurality of image forming pixels. Each of the image forming pixels includes a plurality of divided photo-electric conversion units, and the plurality of photo-electric conversion units have a function of photo-electrically converting a plurality of images having passed through different exit pupils of the imaging optical system, and outputting focus detection signals. Each of the image forming pixels includes a first light guide and a second light guide. The first light guide is arranged on a side of the lens, and the second light guide is arranged on a side of the photo-electric conversion unit, and a division count of the second light guide is larger than the division count of the first light guide.

主权项

1. An image capturing apparatus comprising an image sensor including a plurality of image forming pixels which detect an object image formed by an imaging optical system and generate a captured image, and a lens which is arranged for the plurality of image forming pixels and converges incident light to the image forming pixels,
wherein each of the image forming pixels includes a plurality of divided photo-electric conversion units, the plurality of photo-electric conversion units have a function of photo-electrically converting a plurality of images having passed through different exit pupils of the imaging optical system, and outputting focus detection signals for performing focus adjustment by a phase-difference detection method, each of the image forming pixels includes a first light guide and a second light guide between the lens and the plurality of divided photo-electric conversion units, the first light guide is arranged on a side of the lens, and the second light guide is arranged on a side of the photo-electric conversion unit, a division count of the second light guide is larger than the division count of the first light guide, and a distance between a convergence position of the lens and upper ends of the second light guides is set to be equal to or larger than a one-side focal depth of the lens so that light which passed through the lens enters at the upper ends of the second light guides while the light is spreading.