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 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