The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 09, 2022
Filed:
Oct. 03, 2019
Imec Vzw, Leuven, BE;
IMEC VZW, Leuven, BE;
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.