Vacuum Ultraviolet (VUV-UV) Optical Windows are available from select VUV Grade Magnesium Fluoride (MgF2) & Calcium Fluoride (CaF2).
Magnesium Fluoride: VUV Grade Magnesium Fluoride (MgF2) exhibits high transmission properties from ~ 110nm Vacuum UV (VUV) to ~ 6.0um in the Infrared. MgF2 is a relatively hard crystalline material resistant to mechanical and thermal shock. MgF2 is a birefringent crystal typically oriented along the optical axis to avoid birefringent effects in optical windows & lenses.
Calcium Fluoride: Calcium Fluoride (CaF2) exhibits good transmission properties from ~ 140nm Vacuum UV (VUV) to ~ 8.0um in the Infrared. CaF2 is a relatively soft crystalline material and care should be taken as CaF2 is sensitive to mechanical and thermal shock. CaF2 is a cubic single crystal optical material.
VUV-UV Optical Windows are flat polished round VUV-UV optical windows typically used in general VUV-UV applications such as Deuterium (D2) Lamp and VUV-UV Laser Sources to isolate environments while allowing short wavelength VUV-UV light to transmit as short as 120nm. VUV-UV Optical Windows are generally used for view ports or sealing and or protecting other components within an VUV-UV optical assembly, VUV-UV instrument or VUV-UV laser.
More information can be found on our Material Properties Page. For more information about Optical Windows, refer to our Optics Tutorial page.
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OPTICAL WINDOW SPECIFICATIONS
Material : VUV Grade MgF2, CaF2
Diameter (Dia = Ø) Tolerance: ± 0.25mm
Thickness Tolerance: ± 0.25mm
Transmitted Wavefront: ~L/4 - ~L/2 @ 633 nm nominal
Surface Finish: 20-10 to 40-20 both surfaces
Clear aperture: central 80%
Parallelism: < = 5 arc minutes
Chamfer: ~ 0.30mm @ 45 deg. typical
All dimensions in mm
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DIAMETER Ø
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THICKNESS (T)
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DESCRIPTION
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MATERIAL
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PRODUCT #
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PRICE
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ORDER
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12.5
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2.0
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VUV-UV MgF2 Optical Window
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VUV MgF2
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AQMF1220OW
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$290.00
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AQMF1220OW
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| 12.5 |
2.0 |
VUV-UV CaF2 Optical Window |
VUV CaF2 |
AQCF1220OW
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$210.00 |
AQCF1220OW
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12.7
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3.0
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VUV-UV MgF2 Optical Window
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VUV MgF2
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AQMF1230OW
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$290.00
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AQMF1230OW
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12.7
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3.0
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VUV-UV CaF2 Optical Window
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VUV CaF2
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AQCF1230OW
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$285.00
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AQCF1230OW
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25.0
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3.0
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VUV-UV CaF2 Optical Window
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VUV CaF2
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AQCF2530OW
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$295.00
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AQCF2530OW
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25.0
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3.0
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VUV-UV MgF2 Optical Window
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VUV MgF2
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AQMF2530OW
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$395.00
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AQMF2530OW
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25.4
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5.0
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VUV-UV MgF2 Optical Window
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VUV MgF2
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AQMF2550OW
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$395.00
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AQMF2550OW
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25.4
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5.0
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VUV-UV CaF2 Optical Window
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VUV CaF2
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AQCF2550OW
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$380.00
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AQCF2550OW
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25.4
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2.0
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VUV-UV MgF2 Optical Window
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VUV MgF2
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AQMF2520OW
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$390.00
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AQMF2520OW
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25.4
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2.0
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VUV-UV CaF2 Optical Window
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VUV CaF2
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AQMF2520OW
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$390.00
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AQMF2520OW
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38.1
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4.0
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VUV-UV MgF2 Optical Window
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VUV MgF2
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AQMF3840OW
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$475.00
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AQMF3840OW
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40.0
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3.0
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VUV-UV CaF2 Optical Window
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VUV CaF2
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AQCF4030OW
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$475.00
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AQCF4030OW
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50.0
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3.0
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VUV-UV MgF2 Optical Window
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VUV MgF2
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AQMF5030OW
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$825.00
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AQMF5030OW
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50.0
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3.0
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VUV-UV CaF2 Optical Window
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VUV CaF2
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AQCF5030OW
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$495.00
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AQCF5030OW
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50.8
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5.0
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VUV-UV MgF2 Optical Window
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VUV MgF2
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AQMF5050OW
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$825.00
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AQMF5050OW
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CaF2 Refractive Index
| Wavelength, nm |
157 |
193 |
248 |
308 |
350 |
| Refractive Index (n) |
1.559 |
1.501 |
1.468 |
1.453 |
1.445 |
MgF2 Refractive Index
| Wavelength, nm |
157 |
193 |
248 |
308 |
350 |
| Refractive Index (n) |
1.464 |
1.428 |
1.4097 |
1.398 |
1.393 |
**Also see our UV Fused Silica & BK7 Glass Circular Optical Windows
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(Materials transmittance can vary slightly and this data should be used as a reference only. Based on 2-3mm Thick.)
