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MgF2 Window

MgF2 optical Window

MgF2 Windows(Magnesium Fluoride) is another advantage product of A-Star Photonics. MgF2 material is very difficult to polish due to its soft, A-Star has the stable producing line for several years. We make MgF2 Windows more than 10000pcs each month.

MgF2 Windows
MgF2 Windows(Magnesium Fluoride) is another advantage product of A-Star Photonics. MgF2 material is very difficult to polish due to its soft, A-Star has the stable producing line for several years. We make MgF2 Windows more than 10000pcs each month.
Specifications:

AttributeGeneralHigh Precision
Dimension Tolerance:+0.0/-0.2mm+0.0/-0.02mm
Thickness Tolerance:±0.2mm,±0.05
Surface Quality:80/5040/20
Clear Aperture:>90%>95%
Flatness:λ/2λ/10
Parallelism:<3 arc min.<3 arc sec.
AR Coated:Uncoated, AR, HR, PR, etc.Uncoated, AR, HR, PR, etc.

MgF2 Windows Typical Sizes:

Round Shape: Diameter(mm):Φ5.0 , Φ10.0, Φ12.7.0, Φ15.0,Φ20.0, Φ25.4, Φ38.1, Φ50.8, Φ76.2
Square Shape: WxH(mm)5.0×5.0, 10.0×10.0, 15.0×15.0, 20.0×20.0, 25.0×25.0, 50.0×50.0
Thickness:0.5,1.0,1.5, 2.0, 3.0, 4.0, 5.0,6.0, 8.0,10.0, 50.0

Dimensions are available upon your request.

MgF2 Window crystal substrate
Specifications:
Magnesium fluoride (MgF2) crystal, the diameter of 75 x 3mm, double-sided polishing spot.
Accept size customization.
Reference polishing parameter:
1. Roughness Ra: about 10, 30, 5
2. Dimensional tolerance: +0.1/-0.1
3. Thickness tolerance: ± 0.1
4. Parallel degree: 30 seconds, 5 seconds, 1 minutes, 3minutes
5. Finish: 40-20, 60-40, 20-10 or others
6. Type: 1/4 λ or higher
7. Chamfer: 0.25mm * 45 degrees

MgF2 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.

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