Magnesium
Fluoride (MgF2 window) has excellent transmission in the UV.
This material
can reach transmission greater than 50% at 121.6nm and it
can be used for excimer & Nd:YAG laser optics.
MgF2 is
relatively soft and somewhat hygroscopic so polishing, coating
and handling are more critical than for Fused Silica windows.
The quality of a UV window can be extremely critical, it should
be of high purity and polish in order not to affect the optical
system.
Red
Optronics can supply single crystal mosaic free
VUV grade MgF2 material. We can supply MgF2 window size
up to 4 inch in diameter.
Main Specifications
|
|
|
|
|
Super
Precision |
High
Precision |
Standard
Precision |
Material |
UVU grade MgF2
|
Size |
Dia 5.0~80.0mm x thickness
0.5~10.0mm |
Diameter
Tolerance |
+0/-0.10mm |
Thickness
Tolerance |
±0.10mm
|
Clear
Aperture |
>
85% |
Flatness
(@633nm) |
l
/10 |
l
/4
|
1
l per 25mm
|
Parallelism |
<1 arc
minute |
<1 arc
minute |
<3~5
arc minutes |
Surface
Quality (S/D) |
20/10 |
40/20 |
60/40 |
Bevel |
0.25mm x
45° |
Coating |
Available
upon request
|
|
Standard Products
|
Part No. |
Diameter (mm) |
Thickness (mm) |
WIN-5101 |
12.7 |
2.0 |
WIN-5102 |
25.4 |
4.0 |
WIN-5103 |
38.1 |
5.0 |
WIN-5104
|
50.8
|
5.0
|
|
|