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Calcium
Fluoride has excellent transmission in the UV, they are often
used to make windows with high transmittance from below 150 nm
and extending throughout the visible range.
CaF2 Windows are relatively soft and somewhat hygroscopic
so polishing, coating and handling are more critical than UV
Fused Silica windows.
In addition, 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.
Calcium Fluoride Windows are also applicable for a wide range of
spectrum. It is particularly useful for wavelength at
2980nm laser application.
Red Optronics can supply IR CaF2
window up to 8 inch(or 200mm) in diameter.
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Main Specifications
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|
|
| |
High
Precision |
Standard
Precision |
| Material: |
UVU or
IR grade Calcium Fluoride Single Crystal
|
| 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: |
l
/4
|
1
l
per 25mm @633nm
|
| Parallelism: |
<1 arc
minute |
<3~5
arc minutes |
| Surface
Quality: |
40/20 |
60/40 |
| Bevel: |
0.25mm x
45° |
| Coating: |
Available
upon request
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|
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Standard Products
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|
Part No. |
Diameter (mm) |
Thickness (mm) |
|
WIN-3101 |
12.7 |
2.0 |
|
WIN-3102 |
12.7 |
3.0 |
|
WIN-3103 |
25.4 |
2.0 |
|
WIN-3104 |
25.4 |
3.0 |
|
WIN-3105 |
50.8 |
3.0 |
|
WIN-3106
|
50.8
|
4.0
|
|
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