Patent ID: 11879779
Assignee: 3M INNOVATIVE PROPERTIES COMPANY
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 8:
9. An optical device, comprising:
an optical sensor;
a plurality of photosensitive pixels disposed on the optical sensor;
a wavelength-selective optical filter in optical communication with the photosensitive pixels;
a first plurality of spatially-variant areas disposed in the optical filter;
a second plurality of spatially-variant areas disposed in the optical filter; and
a third plurality of spatially-variant areas disposed in the optical filter,
wherein the wavelength-selective optical filter comprises first and second filter sheets, the first filter sheet defining therein at least one first written region and at least one first non-written region, the second filter sheet defining therein at least one second written region and at least one second non-written region, wherein:
the first plurality of spatially-variant areas comprises an area of the at least one first written region overlapping with an area of the at least one second non-written region;
the second plurality of spatially-variant areas comprises an area of the at least one first non-written region overlapping with an area of the at least one second written region; and
the third plurality of spatially-variant areas comprises an area of the at least one first written region overlapping with an area of the at least one second written region, and
wherein at least one area of the first, second or third pluralities of spatially-variant areas includes a downconverter.