 |
|
|
 |
Material |
Borosilicate
Crown Glass 
|
| Flatness |
Lambda 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 |
W9-05 |
| 25.4 |
3 |
W9-10 |
| 38.1 |
4 |
W9-15 |
| 50.8 |
6 |
W9-20 |
| 76.2 |
8 |
W9-30 |
| 101.6 |
12 |
W9-40 |
| Sizes up
to 400 mm diameter x 60 mm thickness are
available by special order. |
|
| |
|
|
