US 11,747,533 B2
Spectral sensor system using optical filter subarrays
Jonathan Borremans, Lier (BE); Ruben Lieten, Heverlee (BE); Ward van der Tempel, Keerbergen (BE); Maarten De Bock, Ghent (BE); and Jakub Raczkowski, Bertem (BE)
Assigned to Spectricity, Mechelen (BE)
Filed by Spectricity, Mechelen (BE)
Filed on Jun. 16, 2021, as Appl. No. 17/349,142.
Application 17/349,142 is a continuation in part of application No. 17/340,449, filed on Jun. 7, 2021.
Claims priority of provisional application 63/066,507, filed on Aug. 17, 2020.
Claims priority of provisional application 63/047,084, filed on Jul. 1, 2020.
Prior Publication US 2022/0003907 A1, Jan. 6, 2022
Int. Cl. G02B 5/28 (2006.01); H01L 27/146 (2006.01); H04N 5/33 (2023.01); H04N 23/88 (2023.01); H04N 25/76 (2023.01)
CPC G02B 5/281 (2013.01) [G02B 5/283 (2013.01); H01L 27/1464 (2013.01); H01L 27/14625 (2013.01); H01L 27/14649 (2013.01); H01L 27/14685 (2013.01); H04N 5/33 (2013.01); H04N 23/88 (2023.01); H04N 25/76 (2023.01)] 20 Claims
OG exemplary drawing
 
1. An optical sensor system, the system comprising:
a plurality of sets of optical sensors implemented on a substrate, each set of optical sensors having a respective top surface;
a plurality of sets of optical filters, wherein a set of optical filters of the plurality of sets of optical filters is associated with a set of optical sensors of the plurality of sets of optical sensors, wherein a set of optical filters of the plurality of sets of optical filters includes a plurality of optical filters that are arranged in a pattern, wherein each optical filter of the plurality of optical filters is configured to pass light in a different wavelength range of a predefined spectral range and the set of optical filters of the plurality of sets of optical filters operates to provide a bandpass response corresponding to the predefined spectral range, each set of optical filters having a respective top surface and a respective bottom surface, wherein a respective bottom surface of a set of optical filters is located atop a respective top surface of an associated set of optical sensors, wherein at least two sets of optical filters of the plurality of sets of optical filters is configured to provide different bandpass responses;
a plurality of optical elements, wherein each optical element of the plurality of optical elements is associated with a corresponding set of optical sensors; and
one or more rejection filters, wherein each rejection filter is associated with a corresponding set of optical sensors, wherein each rejection filter is configured to pass light wavelengths in a predefined spectral range.