US Patent 7372033 - Quantum dot color wheel filter

http://www.freepatentsonline.com/7372033.html

Color filter wheels are a common component to many multi spectral imaging systems. This patent from Lockheed Martin teaches using quantum dots as the filtering component for such color wheels. Claim 1 reads:

1. A device for filtering radiation from a target region in multiple spectral bands, comprising:

a rotatable disk;

a number of optical quantum dot filters, wherein each of the number of optical quantum dot filters is positioned on the rotatable disk, and wherein each of the number of optical quantum dot filters positioned on the rotatable disk has a particular pass-through wavelength range.