Sapphire Windows

DIEN TECH provides windows fabricated from a variety of substrate materials. Many of our windows are offered with or without AR coatings. Conductive windows, high vacuum conflats and windows, and Brewster windows, which eliminate p-polarization reflectance, are also available.


   Diameter Tolerance:+0.0/-0.1mm

   Thickness Tolerance:±0.1mm 

   Surface Accuracy:λ/2@632.8nm 


   Surface Quality:60-40  

   Clear Aperture:>90%


   Coating:Custom Design 

Comparison of optical window materials

Properties Applications
Transmission Range: 330-2100nm 
Refractive Index: 1.5164@588nm
Most popular and low cost
Visible and near IR spectrum applications
Fused Silica
Transmission Range: 185-2500nm
Refractive Index: 1.4858@308nm
Low Thermal Expansion Coefficient: 0.54 x 10-6K
UV to IR spectrum
Best choice for thermal resistance 
Sapphire Transmission Range: 180-4500nm
Refractive Index: 1.755@1000nm
Strong Hardness
Best choice for scratch resistance applications Thinner optics Wide Transmission Range
CaF2 Transmission Range: 170-7800nm
Refractive Index: 1.399@5000nm
Little Hygroscopic Susceptibility
High Thermal Expansion Coefficient: 18.85 x 10-6K
IR laser applications
MgF2 Transmission Range: 120-7000nm
Refractive Index: 1.376@700nm
UV laser applications

Customized Available