Vacuum Ultraviolet (VUV-UV) Optical Windows are available from select VUV Grade Magnesium Fluoride (MgF2), Calcium Fluoride (CaF2) and Crystalline Quartz materials.

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 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.

Crystalline Quartz:  Crystal Quartz exhibits good transmission properties from ~ 147nm Vacuum UV (VUV) to ~ 2.5um in the Infrared.  Crystal Quartz is a very hard crystalline material with low thermal expansion coefficient.  Crystal Quartz is a grown crystalline form of Silicon Dioxide (SiO2) optical material.

VUV-UV Optical Windows are flat polished round VUV-UV 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.

For more information about Optical Windows, refer to our Optics Tutorial page. 

OPTICAL WINDOW SPECIFICATIONS Material : VUV Grade MgF2, CaF2 & Crystal Quartz      Diameter (Dia = Ø) Tolerance: ± 0.25mm Thickness Tolerance: ± 0.25mm   Transmitted Wavefront:  ~L/4 @ 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

 

DIA Ø	THICK (T)	DESCRIPTION	MATERIAL	PRODUCT #	PRICE	ORDER
12.7	6.35	VUV-UV MgF2 Window	VUV MgF2	AQMF1264OW	$265.00	AQMF1264OW
12.7	6.35	VUV-UV CaF2 Window	VUV CaF2	AQCF1264OW	$260.00	AQCF1264OW
12.7	2.0	VUV-UV CQ Window	Crystal Quartz	AQCQ1220OW	$355.00	AQCQ1220OW
25.4	6.35	VUV-UV MgF2 Window	VUV MgF2	AQMF2564OW	$365.00	AQMF2564OW
25.4	6.35	VUV-UV CaF2 Window	VUV CaF2	AQCF2564OW	$355.00	AQCF2564OW
25.4	2.5	VUV-UV CQ Window	Crystal Quartz	AQCQ2525OW	$405.00	AQCQ2525OW
36.0	5.0	VUV-UV MgF2 Window	VUV MgF2	AQMF3650OW	$440.00	AQMF3650OW
36.0	5.0	VUV-UV CaF2 Window	VUV CaF2	AQCF3650OW	$430.00	AQCF3650OW
38.1	5.0	VUV-UV MgF2 Window	VUV MgF2	AQMF3850OW	$460.00	AQMF3850OW
38.1	5.0	VUV-UV CaF2 Window	VUV CaF2	AQCF3850OW	$445.00	AQCF3850OW
38.1	5.0	VUV-UV CQ Window	Crystal Quartz	AQCQ3850OW	$850.00	AQCQ3850OW
50.8	5.0	VUV-UV MgF2 Window	VUV MgF2	AQMF5050OW	$565.00	AQMF5050OW
50.8	5.0	VUV-UV CaF2 Window	VUV CaF2	AQCF5050OW	$545.00	AQCF5050OW
50.8	9.52	VUV-UV MgF2 Window	VUV MgF2	AQMF5095OW	$675.00	AQMF5095OW
50.8	9.52	VUV-UV CaF2 Window	VUV CaF2	AQCF5095OW	$650.00	AQCF5095OW

                    CaF2 Refractive Index                                       MgF2 Refractive Index 

Wavelength, nm	157	193	248	308	350
Refractive Index (n)	1.464	1.428	1.415	1.405	1.387

   

                     Crystalline Quartz  

  

           Crystal Quartz Refractive Index

            **Also see our UV Fused Silica & BK7 Glass Circular Optical Windows

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