US 12,426,391 B2
Hyperspectral filter structure and method of manufacture
Jonathan Borremans, Lier (BE); Ruben Lieten, Heverlee (BE); Maarten De Bock, Ghent (BE); and Ward van der Tempel, Keerbergen (BE)
Assigned to Spectricity, Mechelen (BE)
Filed by Spectricity, Mechelen (BE)
Filed on Apr. 4, 2022, as Appl. No. 17/657,793.
Claims priority of provisional application 63/182,237, filed on Apr. 30, 2021.
Prior Publication US 2022/0352215 A1, Nov. 3, 2022
Int. Cl. H10F 39/00 (2025.01); G02B 5/28 (2006.01)
CPC H10F 39/805 (2025.01) [G02B 5/285 (2013.01); H10F 39/024 (2025.01)] 21 Claims
OG exemplary drawing
 
1. A sensor system, comprising:
a plurality of optical sensors implemented in a pixel layer of an integrated circuit; and
a plurality of sets of optical filters spatially distributed on the pixel layer in a plurality of alternating filter layers, wherein each optical filter of a set of optical filters includes a plurality of filter components implemented in a stack and is configured to pass a respective target wavelength range of light to one or more optical sensors of the plurality of optical sensors, wherein a filter component of the plurality of filter components in a filter layer of the plurality of filter layers is common to a plurality of optical filters of a set of optical filters.