Multichannel close-up imaging device
US12242081B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 22, 2022 |
| Grant date | Mar 4, 2025 |
| Priority date | — |
| Expiry date | Jul 22, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/24
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention relates to a multichannel imaging device and more specifically to a multichannel device wherein each optical channel has at least an optical low-pass angular filter configured to block any light propagating through the optical channel along a direction of propagation having an angle which is greater than a predefined angle θL relative to the optical axis, the low-pass angular filter comprising at least one planar interface, separating a first material having a first refractive index n1 and a second material having a second refractive index n2, the ratio of the second refractive index over the first refractive index being lower than 1, preferably lower than 0.66.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.