On-chip polarization detection and polarimetric imaging
US11385104B2 · kind B2 · utility
7Cited by
2References
20Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 21, 2018 |
| Grant date | Jul 12, 2022 |
| Priority date | — |
| Expiry date | Dec 21, 2038 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB82Y20/00
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A polarization sensor is described. It includes a quarter-wave plate to convert circularly polarized light into linearly polarized light. The quarter-wave plate is realized as a metasurface. The sensor also includes a linear polarizer to analyze the light generated by the quarter-wave plate, and a photodetector to receive the analyzed light. The sensor may be combined with other linear polarization sensors to form a sensor capable of complete measurement of the polarization state of incident light. An array of these sensors can be integrated directly onto image sensors to form a polarimetric imager.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.