Patent ID: 8733929

Claim:
A color contrast enhancing sunglass lens, comprising: a lens body made from an optical material and having a luminous transmittance ranging between 8% and 40%; and a multi-layer coating disposed on said lens body and including a set of alternating layers formed of materials having different refractive indices; said multi-layer coating confining transmission of visible light to a predetermined spectral profile having at least three high transmission bands, three low transmission bands, and spectral transmittance being not less than 15% between 475 nm and 650 nm, wherein said three high transmission bands include a blue band centered at about 450 nm, a green band centered at about 545 nm, and a red band centered at about 650 nm, each of said high transmission bands having a maximum of spectral transmittance not less than 60%; and wherein said three low transmission bands include a purple band centered at about 405 nm, a cyan band centered at about 490 nm, and a yellow band centered at about 590 nm, each of said low transmission bands having a minimum of spectral transmittance not greater than 40%.