Optical element comprising mix of nir dyes for broader nir cut and better aesthetic
AssigneeEssilor International
InventorsPierre FROMENTIN, Harutsai WAIPUNYA, Haifeng SHAN, Hao-Wen CHIU
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Abstract
Disclosed are optical elements that contains two or more near infrared absorbers and methods of producing the same. Two near infrared absorbers with different near infrared wavelengths absorption ranges and residual colors are mixed with a precursor of an optical substrate. The resulting mixture is subsequently processed to produce optical elements that have a broad near infrared wavelength absorption range and a neutral residual color.
Claims16
An optical element comprising an optical substrate and two or more near infrared absorbers mixed in the optical substrate, wherein the two or more near infrared absorbers have different near infrared cut ranges and different residual colors.
Dependencies are inferred from the claim text.