DARWIN OPTICAL CO., LTD.
|DARWIN OPTICAL CO., LTD. Patent applications|
|Patent application number||Title||Published|
|20110038024||PHOTOCHROMIC OPTICAL ARTICLE - A photochromic optical article comprises a substrate, and a photochromic coating coated on an outer surface of the substrate and having at least two photochromic layers. Each of the photochromic layers has a composition that contains a carrier and at least one photochromic dye. The compositions of the photochromic layers are different from each other.||02-17-2011|