Image sensor comprising a color splitter with two different refractive indexes
US11604363B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 8, 2019 |
| Grant date | Mar 14, 2023 |
| Priority date | — |
| Expiry date | Mar 8, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F39/8053
- WIPO fieldMeasurement
- WIPO sectorInstruments
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 record…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.