Patent · US Active

Multichannel close-up imaging device

US11454745B2 · kind B2 · utility

0Cited by
5References
15Claims
0Family size

Assignee

Inventor

Key dates

Filing dateMay 31, 2019
Grant dateSep 27, 2022
Priority date—
Expiry dateMay 31, 2039

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.