Patent ID: 8582192

Claim:
A photochromic article comprising: a substrate; a primer layer comprising a first photochromic compound having a first peak absorbance wavelength and a first terminal minimum absorbance wavelength, said first terminal minimum absorbance wavelength being at higher wavelength than said first peak absorbance wavelength, and said primer layer being positioned over said substrate; and a photochromic-dichroic layer comprising a photochromic-dichroic compound having a second peak absorbance wavelength and a second terminal minimum absorbance wavelength, said second terminal minimum absorbance wavelength being at higher wavelength than said second peak absorbance wavelength, and said photochromic-dichroic layer being positioned over said primer layer, wherein said second peak absorbance wavelength is less than said first peak absorbance wavelength, and said second terminal minimum absorbance wavelength is less than said first terminal minimum absorbance wavelength, and further wherein said photochromic-dichroic compound has an absorbance of less than or equal to 0.1 at said first peak absorbance wavelength.