Color contrast enhancing sunglass lens
First Claim
1. 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%.
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Accused Products
Abstract
A color contrast enhancing sunglass lens includes a lens body and a multi-layer coating disposed on the lens body. The multi-layer coating includes a set of alternating layers formed of materials having different refractive indices and confines the transmission of visible light to a predetermined spectral profile having at least three high transmission bands that include blue, green and red bands and that have a maximum of spectral transmittance no less than 60%, three low transmission bands that include purple, cyan and yellow bands and that have a minimum of spectral transmittance no greater than 40%, and no spectral transmittance being less than 15% between 475 and 650 nm. The color contrast enhancing sunglass lens as disclosed meets the ANSI specification Z80.3-2009 section 4.6.3.3.
40 Citations
16 Claims
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1. A color contrast enhancing sunglass lens, comprising:
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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%. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification