Material: Bk7,
Fused Silica, Germanium, Silicon, Sapphire, CaF2, MgF2
Specifications
| Material |
Bk7, (other material upon request) |
| Focal Length Tolerance |
2% |
| Fringes |
1-5 |
| Fringes Irregularity |
0.2-0.5 |
| Diameter Tolerance |
+0.05/-0.05 mm |
| Center Thickness(Tc) Tolerance |
-0.005/+0.005 mm |
| Surface Quality: |
60-40 scratch and dig |
Product list
|
Product No.
|
Diameter (mm)
|
Center Thickness Tc (mm)
|
|
LDM20
|
2.0
|
3.0
|
|
LDM30
|
3.0
|
4.0
|
|
LDM40
|
4.0
|
5.0
|
|
LDM50
|
5.0
|
6.0
|
|
LDM60
|
6.0
|
7.0
|
|
LDM70
|
7.0
|
8.0
|
|
LDM80
|
8.0
|
9.0
|
|
LDM90
|
9.0
|
10.0
|
|
LDM100
|
10.0
|
11.0
|
Note: Special material and size are available
upon request.
