Patent ID: 8630049

Claim:
A color correction filter assembly comprising: an optical substrate; a first coating on a first surface of said optical substrate, said first coating first attenuating by a first amount both first and second spectral peaks in an optical beam passing through said optical substrate, said first amount being greater than a second amount by which areas outside a range including said spectral peaks are attenuated, and where said first attenuating by said first amount is by an amount less than 70% attenuation; and a second coating on a second surface of the optical substrate which operates as a color correction filter, wherein said first surface of the optical substrate and said second surface of the optical substrate are opposite surfaces of the optical substrate, wherein said second coating has a first color correction filter property on a first area of the second surface of the substrate, said first color correction filter property which raises a color temperature of the light beam and wherein said second coating has a second color correction filter property on a second area of the second surface of the substrate which lowers the color temperature of the light beam.