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

Claim 0:
1. An optical system, 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, the wavelength-selective optical filter being disposed remotely from the optical sensor; and
a plurality of spatially-variant areas disposed in the optical filter, at least one area of the plurality of spatially-variant areas including a downconverter,
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, the plurality of spatially-variant areas comprising:
an area of the at least one first written region overlapping with an area of the at least one second non-written region;
an area of the at least one first non-written region overlapping with an area of the at least one second written region; and
an area of the at least one first written region overlapping with an area of the at least one second written region.