	US 11,972,508 B2
	Image sensor comprising a color splitter with two different refractive indexes, and different height
Oksana Shramkova, Cesson-Sévigné (FR); Mitra Damghanian, Cesson-Sévigné (FR); and Laurent Blonde, Thorigné-Fouillard (FR)
Assigned to InterDigital CE Patent Holdings, SAS, Paris (FR)
Appl. No. 17/257,248
Filed by InterDigital CE Patent Holdings, Paris (FR)
PCT Filed May 28, 2019, PCT No. PCT/EP2019/063739 § 371(c)(1), (2) Date Dec. 30, 2020, PCT Pub. No. WO2020/007534, PCT Pub. Date Jan. 9, 2020.
Claims priority of application No. 18305846 (EP), filed on Jul. 2, 2018.
Prior Publication US 2021/0233291 A1, Jul. 29, 2021
Int. Cl. G06T 11/00 (2006.01); G02B 27/10 (2006.01); G06T 11/40 (2006.01); H01L 27/146 (2006.01)

CPC G06T 11/001 (2013.01) [G02B 27/1006 (2013.01); G06T 11/005 (2013.01); G06T 11/40 (2013.01); H01L 27/14621 (2013.01); H01L 27/14625 (2013.01)]

20 Claims

1. An image sensor comprising pixels for acquiring color information from incoming visible light, wherein said image sensor comprising three pixels being partially covered by a color splitter structure for deviating only one color channel of said incoming visible light towards one of said three pixels, and for deviating other colors of said incoming visible light towards the other pixels among said three pixels, wherein the color splitter structure comprises a first, a second and a third parallelepiped structures arranged so that the first and the third parallelepiped structures are side by side and in contact with the second parallelepiped structure, and wherein the first and the third parallelepiped structures have same dimensions, and are made of a same dielectric material, with a refractive index n_H, and wherein said second parallelepiped structure being smaller in height compared to said first and third parallelepiped structures, and wherein said second parallelepiped structure being made of a dielectric material with a refractive index n_L.