US 12,261,184 B2
Image sensor and image capturing apparatus
Koichi Fukuda, Tokyo (JP); Kohei Okamoto, Kanagawa (JP); and Shunichi Wakashima, Tokyo (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Oct. 8, 2021, as Appl. No. 17/496,955.
Application 17/496,955 is a continuation of application No. PCT/JP2020/016448, filed on Apr. 14, 2020.
Claims priority of application No. 2019-077356 (JP), filed on Apr. 15, 2019; and application No. 2020-070011 (JP), filed on Apr. 8, 2020.
Prior Publication US 2022/0028914 A1, Jan. 27, 2022
Int. Cl. H01L 27/146 (2006.01); G02B 3/00 (2006.01); G03B 13/32 (2021.01); H04N 23/55 (2023.01); H04N 23/67 (2023.01); H04N 23/80 (2023.01); H04N 25/704 (2023.01)
CPC H01L 27/14627 (2013.01) [G02B 3/0056 (2013.01); G03B 13/32 (2013.01); H04N 23/55 (2023.01); H04N 23/671 (2023.01); H04N 23/80 (2023.01); H04N 25/704 (2023.01); H01L 27/1464 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An image sensor having a plurality of pixels including focus detection pixels that outputs signals from which a pair of focus detection signals having parallax can be obtained based on light flux passing through different pupil regions of an imaging optical system, each pixel comprising:
at least one photoelectric conversion unit; and
a microlens optical system provided on a side on which light is incident with respect to the photoelectric conversion unit,
wherein each microlens of the microlens optical system only covers two photoelectric conversion units in both an X direction and a Y direction of an imaging plane, and
wherein the microlens optical system has one principal curved surface and a shape of the principal curved surface of the microlens optical system is a circle in plan view and such that a first focal point of a circular portion of the microlens optical system with a radius of a first distance from an optical axis of the microlens optical system is located on the side where the light enters with respect to a second focal point of a circular portion of the microlens optical system with a radius of a second distance which is farther from the optical axis of the microlens optical system than the first distance.