Vacuum Ultraviolet (VUV) to Ultraviolet (UV) Optical Windows are available from select VUV Grade Magnesium Fluoride (MgF2); Calcium Fluoride (CaF2) & Sapphire.  VUV Grade Lithium Fluoride Optical Windows are available upon request.

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.  MgF2 Axis Orientation is within +/- 5 degrees. 

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.

Sapphire:  Sapphire (Al2O3) exhibits good transmission range extending from the ~ 150nm Vacuum UV (VUV) to ~ 5.0um in the Infrared.  Sapphire is an exceptional hard material and can only be scratched by a few materials other than itself.  Sapphire is chemically inert and insoluble to water, common acids, or alkalis at temperatures up to ~1,000 °C. Sapphire is typically oriented so that the c-axis of the crystal is parallel with the optical axis.

 

                                   

 

OPTICAL WINDOW SPECIFICATIONS   Material: VUV Grade MgF2, CaF2 & Sapphire Diameter (Dia = Ø) Tolerance: ± 0.25mm Thickness Tolerance: ± 0.30mm   Transmitted Wavefront:  ~L/4 - L/2 @ 633 nm nominal Sapphire: ~ 1 wave @ 633 nm nominal Surface Finish:  20-10 to 40-20 both surfaces Sapphire: 60-40 to 80-50 both surfaces Clear Aperture: central 80% Parallelism:  < = 5 arc minutes  Chamfer: ~ 0.30mm @ 45 deg. typical MgF2 Axis Orientation: +/- 1-2 Degrees typical (All dimensions in mm)

                    

 

 

DIAMETER Ø	THICK (T)	DESCRIPTION	MATERIAL	PRODUCT #	PRICE	ORDER
10.0mm	1.5mm	VUV to UV MgF2 Optical Window	VUV MgF2	AQMF1015OW	$375.00	AQMF1015OW
10.0mm	1.5mm	VUV to UV CaF2 Optical Window	UV CaF2	AQCF1015OW	$225.00	AQCF1015OW
10.0mm	1.0mm	VUV to UV Sapphire Optical Window	Sapphire	AQSP1010OW	$215.00	AQSP1010OW
12.7mm	2.0mm	VUV to UV MgF2 Optical Window	VUV MgF2	AQMF1220OW	$395.00	AQMF1220OW
12.5mm	2.0mm	VUV to UV CaF2 Optical Window	UV CaF2	AQCF1220OW	$275.00	AQCF1220OW
12.7mm	3.0mm	VUV to UV MgF2 Optical Window	VUV MgF2	AQMF1230OW	$425.00	AQMF1230OW
12.7mm	3.0mm	VUV to UV CaF2 Optical Window	UV CaF2	AQCF1230OW	$275.00	AQCF1230OW
12.7mm	3.0mm	VUV to UV Sapphire Optical Window	Sapphire	AQSP1230OW	$150.00	AQSP1230OW
25.0mm	3.0mm	VUV to UV CaF2 Optical Window	UV CaF2	AQCF2530OW	$350.00	AQCF2530OW
25.0mm	3.0mm	VUV to UV MgF2 Optical Window	VUV MgF2	AQMF2530OW	$525.00	AQMF2530OW
25.4mm	3.0mm	VUV to UV MgF2 Optical Window	VUV MgF2	AQMF2630OW	$525.00	AQMF2630OW
25.4mm	5.0mm	VUV to UV MgF2 Optical Window	VUV MgF2	AQMF2550OW	$535.00	AQMF2550OW
25.4mm	5.0mm	VUV to UV CaF2 Optical Window	UV CaF2	AQCF2550OW	$375.00	AQCF2550OW
25.4mm	5.0mm	VUV to UV Sapphire Optical Window	Sapphire	AQSP2550OW	$195.00	AQSP2550OW
20.0mm	2.0mm	VUV to UV CaF2 Optical Window	UV CaF2	AQCF2020OW	$375.00	AQCF2020OW
40.0mm	3.0mm	VUV to UV CaF2 Optical Window	UV CaF2	AQCF4030OW	$475.00	AQCF4030OW
50.0mm	3.0mm	VUV to UV MgF2 Optical Window	VUV MgF2	AQMF5030OW	$905.00	AQMF5030OW
50.0mm	3.0mm	VUV to UV CaF2 Optical Window	UV CaF2	AQCF5030OW	$495.00	AQCF5030OW
50.8mm	3.15mm	VUV to UV Sapphire Optical Window	Sapphire	AQSP5031OW	$450.00	AQSP5031OW
75.0mm	5.0mm	VUV to UV CaF2 Optical Window	UV CaF2	AQCF7550OW	$895.00	AQCF7550OW
75.0mm	2.0mm	VUV to UV Sapphire Optical Window	Sapphire	AQSP7520OW	$925.00	AQSP7520OW
75.0mm	5.0mm	VUV to UV MgF2 Optical Window	VUV MgF2	AQMF7550OW	$2250.00	AQMF7550OW

 

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


VUV to UV Optical Windows are flat polished round VUV to UV optical windows typically used in general VUV-UV applications such as Deuterium (D2) Lamp and VUV to UV Laser Sources to isolate environments while allowing short wavelength VUV through UV light to transmit as short as 120nm.   VUV to UV Optical Windows are generally used for view ports or sealing and or protecting other components within an VUV to UV optical assembly, VUV to UV instrument or VUV to UV laser.

 

More information can be found on our Material Properties Page.   For more information about Optical Windows, refer to our Optics Tutorial page.             

 

 

                                                          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 ( (o) & (e) avg. )

Wavelength, nm	157	193	248	308	350
Refractive Index (n)	1.464	1.428	1.4097	1.398	1.393

   

 

 

                          

 

                          Sapphire (Al2O3) Refractive Index ( (0) & (e) avg.)

            

 

 

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