| Material |
Fused Silica  |
| Flatness |
Lambda/4 at 633 nm per inch |
| Scratch-Dig |
40 - 20 |
| Size tolerance |
± 0.1 mm |
| Parallelism |
less than 3 arc minutes |
| Clear aperture |
90 % |
| Bevels |
(0.2-0.5)mm x 45° | |
|
|
|
|
 |
Diameter, mm |
Thickness, mm |
Part Number |
| 12.7 |
2 |
W8-05 |
| 25.4 |
3 |
W8-10 |
| 38.1 |
4 |
W8-15 |
| 50.8 |
6 |
W8-20 |
| 76.2 |
8 |
W8-30 |
| 101.6 |
12 |
W8-40 |
| Sizes up to 400 mm diameter x 40 mm thickness are available by special order. | | |
|
