Patent ID: 11604363

Abstract:
The disclosure relates to an image sensor comprising pixels for acquiring color information from incoming visible light, wherein said image sensor comprising at least two pixels being partially covered by a color splitter structure comprising a first part and a second part, each of said first and second parts being adjacent to a dielectric part, each of said dielectric part having a first refractive index n1 (said first part having a second refractive index n2, and said second part having a third refractive index n3, wherein n1<n3<n2, and wherein according to a cross section, the first part of said color splitter structure has a first width W1, a height H and the second part of said color splitter structure has a second width W2, and the same height H, and wherein said color splitter structure has a first, a second and a third edges at the interfaces between parts having different refractive indexes, each edge generating beams or nanojets, and wherein said height H is close to a value Formul (I), where ΘB1 and ΘB3 are tan ΘB1 and are respectively radiation angles of a first and a third beams generated by said first and third edges, and wherein one of said at least two pixels records light associated with a first wavelength λ-1 and the other of said at least two pixels records light having a spectrum in which no or few electromagnetic waves having a wavelength equal to λ-1 are present, wherein said first wavelength λ-1 being either high or small in a range of visible light.