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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 |