Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Comparison between different optical window materials for VUV spectroscopy.
| Material | Knoop Hardness | Advantages | Disadvantages |
|---|---|---|---|
| Lithium Fluoride | 100 Kg/mm2 | Large VUV-IR transmittance | Very brittle, expensive |
| Magnesium Fluoride | 415 Kg/mm2 | Large VUV-IR transmittance | Brittle, expensive |
| VUV graded Sapphire | 1370 Kg/mm2 | Cheap, resistant, some VUV capabilities | Limited transmittance window |
| Fused Quartz | 741 Kg/mm2 | Cheap, resistant | Limited transmittance window |
