| 发明名称 |
OPTICAL ARTICLE WITH GRADIENT PHOTOCHROMISM |
| 摘要 |
The present invention is drawn to an optical article comprising: (a) a photochromic substrate comprising at least one photochromic dye, and (b) an interference coating having a specific gradient thickness providing for a gradient reflectance. It also pertains to a process for making such an optical article. |
| 申请公布号 |
US2016231594(A1) |
申请公布日期 |
2016.08.11 |
| 申请号 |
US201415023086 |
申请日期 |
2014.09.19 |
| 申请人 |
ESSILOR INTERNATIONAL (COMPAGNIE GENERALE D'OPTIQUE) |
发明人 |
Ang Ker Chin Dave;Pelayo Andrew;De Ayguavives Francisco |
| 分类号 |
G02C7/10;G02B1/111;C23C14/24;G02B5/28 |
主分类号 |
G02C7/10 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. An optical article comprising:
(a) a photochromic substrate having two opposite sides and comprising at least one photochromic dye, wherein said photochromic substrate has a first surface portion and a second surface portion which are located on opposite ends of the same side of said photochromic substrate, (b) an interference coating having a gradient thickness, such that its thickness decreases from a highest thickness region located on said first surface portion to a lowest thickness region located on said second surface portion, wherein the difference between the mean reflectance factor of the highest thickness portion and the mean reflectance factor of the lowest thickness portion, in the wavelength range of from 330 to 380 nm, ranges from 15 to 80%. |
| 地址 |
Charenton-Le-Pont FR |
