| 摘要 |
Transparent substrate made of a glassy or plastic material comprising a surface film including from 10 to 50 layers directly superimposed over one another incorporating alternately a first (high-refractive index, e.g. TIO2 or ZrO2) and a second (low-refractive index, e.g. SIO2 or Mg F2) material having a refractive index at 550 nm equal to or greater, and respectively lower, than 2, wherein each of the layers that incorporate said first material has a thickness comprised between 10 and 110 nm and each of the layers that incorporate said second material has a thickness comprised between 50 and 250 nm. |
