Image sensor with sub-pixel photodiode array with multiple mini-wire grid polarizers for polarization imaging
US11644606B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 14, 2021 |
| Grant date | May 9, 2023 |
| Priority date | — |
| Expiry date | Oct 14, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F39/807
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image sensor configured to resolve intensity and polarization has multiple pixels each having a single microlens adapted to focus light on a central photodiode surrounded by at least a first, a second, a third, and a fourth peripheral photodiodes, where a first polarizer at a first angle is disposed upon the first peripheral photodiode, a third polarizer at a third angle is disposed upon the third peripheral photodiode, a second polarizer at a second angle is disposed upon the second peripheral photodiode, and a fourth polarizer at a fourth angle is disposed upon the fourth peripheral photodiode, the first, second, third, and fourth angles being different. In embodiments, 4 or 8 peripheral photodiodes are provided, and in an embodiment the polarizers are parts of an octagonal polarizer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.