Patent ID: 6855431

Claim:
An electrochromic optically attenuating contrast enhancement filter that may be used as an integral part of a device or that may be affixed to an already constructed device, said electrochromic optically attenuating contrast enhancement filter comprising: a first glass substrate having a first transparent conductor coated surface; a second glass substrate having a second transparent conductor coated surface, said second substrate positioned in a spaced-apart relationship with said first substrate and with said first and second conductor coated surfaces facing each other; and an electrochromic medium disposed between said first and second substrates whereby the transmission of light through said electrochromic medium is changed when an electrical potential is applied thereto and wherein said electrochromic medium comprises a plasticized, cross-linked polymeric solid film formed by curing an electrochromic monomer composition comprising at least one anodic electrochromic compound and at least one cathodic electrochromic compound.