Magnesium Fluoride Windows

Optics >>> Windows >>> MgF2 Windows

Magnesium Fluoride (MgF2 window) has excellent transmission in the UV.  This material can reach transmission greater than 50% at 121.6nm and it can be used for excimer & Nd:YAG laser optics.  MgF2 is relatively soft and somewhat hygroscopic so polishing, coating and handling are more critical than for Fused Silica windows. 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.  

Red Optronics can supply single crystal mosaic free VUV grade MgF2 material.  We can supply MgF2 window size up to 4 inch in diameter.

 

Main Specifications
  Super Precision High Precision Standard Precision
Material

UVU grade MgF2

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 (@633nm) l /10 l /4 1 l per 25mm 
Parallelism <1 arc minute <1 arc minute <3~5 arc minutes
Surface Quality (S/D) 20/10 40/20 60/40
Bevel 0.25mm x 45
Coating

Available upon request

Standard Products
Part No.
Diameter (mm)
Thickness (mm)
WIN-5101

12.7

2.0
WIN-5102
25.4
4.0
WIN-5103
38.1

5.0

WIN-5104

50.8

5.0

 

    

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