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Products: Excimer-Grade CaF2 and MgF2 Laser Windows

Excimer-Grade CaF2 and MgF2 Laser Windows image

Acton Optics & Coatings windows are made from select grades of the finest available optical materials. VUV/UV windows are suitable for a large range of VUV-UV applications. Flat laser windows are suitable for high-power laser applications and as substrates for mirrors and beamsplitters.

Note: Excimer-grade CaF2 and MgF2 substrates are available for laser cavity optics and are available with transmittance traces for an additional charge.  Contact us at [email protected] for more details.


Fused Silica Laser Windows

Part Number Diameter Thickness Substrate Material
W1D-FLC 1.0” (25.4mm) 0.250” (6.35mm) Excimer-grade CaF2
W1.5D-FLC 1.5” (38.1mm) 0.200” (5mm) Excimer-grade CaF2
W2D-FLC 2.0” (50.8mm) 0.375” (9.53mm) Excimer-grade CaF2
W1D-FLM 1.0” (25.4mm) 0.250” (6.35mm) Excimer-grade MgF2
W1.5D-FLM 1.5” (38.1mm) 0.200” (5mm) Excimer-grade MgF2
W2D-FLM 2.0” (50.8mm) 0.375” (9.53mm) Excimer-grade MgF2


Material Excimer-grade CaF2, MgF2
Diameter Tolerance +0.00/-0.005”
Thickness Tolerance +/-0.25mm
Surface Figure Both sides 1/10 Wave @ 632.8nm
Parallelism 3 arc min
Scratch/Dig 20-10
Chamfer 0.5mm x 45°
Clear Aperture Central 85%

Acton Optics & Coatings can supply custom optics for your OEM applications.

VUV/UV grade calcium fluoride transmission properties
VUV/UV Magnesium fluoride transmission properties