Patent · US Active

Spectral sensor for multispectral imaging

US11408769B2 · kind B2 · utility

0Cited by

2References

17Claims

0Family size

Assignee

IMEC VZW · BE

Inventors

Nicolaas Tack · Buggenhout, BE
Nick Spooren · Mechelen, BE
Bart Vereecke · Leuven, BE

Key dates

Filing date	Oct 3, 2019
Grant date	Aug 9, 2022
Priority date	—
Expiry date	Oct 8, 2040

Classification

Technology area (CPC G)Physics
CPC primaryG01J2003/2826
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A spectral sensor comprises (i) a first type of interference filter comprising reflective multilayers of a first type and an intermediate layer configured to give a constructive interference for a wavelength in a first range, and (ii) a second type of interference filter comprising reflective multilayers of a second type and an intermediate layer configured to give a constructive interference for a wavelength in a second range. The sensor further comprises first and second filter stacks configured to selectively transmit light in the first and second wavelength ranges to first and second photo-sensitive areas, respectively. The first filter stack includes the first type of interference filter and a second type of dielectric mirror that is reflective in the second wavelength range. The second filter stack includes the second type of interference filter and a first type of dielectric mirror that is reflective in the first wavelength range.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.