Metal mirror based multispectral filter array
A device may include a multispectral filter array disposed on the substrate. The multi spectral filter array may include a first metal mirror disposed on the substrate. The multi spectral filter may include a spacer disposed on the first metal mirror. The spacer may include a set of layers. The spacer may include a second metal mirror disposed on the spacer. The second metal mirror may be aligned with two or more sensor elements of a set of sensor elements.
1. A device, comprising:
a set of optical sensors associated with a substrate; and
a multispectral filter array deposited on the substrate,
the multispectral filter array including:
a first silver (Ag) metal mirror,
a second silver (Ag) metal mirror, and
a plurality of spacer layers disposed between the first silver (Ag) metal mirror and the second silver (Ag) metal mirror.
2. The device of claim 1 , where the set of optical sensors are embedded into the substrate.
3. The device of claim 1 , where the set of optical sensors are associated with receiving a portion of light from a light source.
4. The device of claim 1 , where the set of optical sensors is aback illuminated sensor array.
5. The device of claim 1 , where the plurality of spacer layers comprise a material selected to reduce an angle shift of light directed from a light source toward the set of optical sensors.
6. The device of claim 1 , where the set of optical sensors are a plurality of optical sensors of a super array.
7. The device of claim 1 , where the substrate includes a silicon-based substrate.
8. The device of claim 1 , where the set of optical sensors are disposed in a silicon-based wafer.
9. The device of claim 8 ,
where the substrate includes a glass-based substrate, and
where the silicon-based wafer is bonded to the glass-based substrate.
10. The device of claim 1 , where the substrate includes one or more conductive pathways to provide information obtained by the set of optical sensors.
11. A device, comprising:
one or more sensor elements embedded into a substrate; and
a multispectral filter array deposited on the substrate,
the multispectral filter array including:
a first metal mirror,
a second metal mirror, and
a plurality of spacer layers.
12. The device of claim 11 ,
where the first metal mirror is a first silver (Ag) metal mirror, and
where the second metal mirror is a second silver (Ag) metal mirror.
13. The device of claim 11 , where the plurality of spacer layers are disposed between the first metal mirror and the second metal mirror.
14. The device of claim 11 , where the plurality of spacer layers are disposed on at least the first metal mirror.
15. The device of claim 11 , where the first metal mirror includes a silver (Ag) metal mirror.
16. The device of claim 11 , further comprising:
an intermediate layer between the substrate and the first metal mirror.
17. The device of claim 11 , where the one or more sensor elements include a plurality of sensor elements.
18. The device of claim 17 , where the plurality of spacer layers include:
a first spacer layer that covers all of the plurality of sensor elements; and
a second spacer layer that covers at least a half of the plurality of sensor elements and less than all of the plurality of sensor elements.
19. The device of claim 18 , where the plurality of spacer layers further include:
a third spacer layer that covers less than the half of the plurality of sensor elements.
20. The device of claim 11 , further comprising:
an anti-reflective coating filter that is deposited on top of a top metal mirror of the one or more metal mirrors.