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AR Coated Windows

One large and two small round AR coated windows in transparent blue color

AR Coated Windows

Wavelength range

190 – 3000 nm


5 – 200 mm


Round, rectangular, eliptical

Surface quality, S-D


Transmitted wavefront distortion, P-V

<λ/10 @ 632.8 nm*

Residual reflectance



>15 J/cm² @ 1064 nm, 10 ns, 10 Hz**

*depending on bandwidth **higher values possible

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AR coated optics

As light passes through an uncoated glass substrate, approximately 4% will be reflected at each interface. This results in a total transmission of only 92% of the incident light. AR Coated Windows increase the throughput of the system and reduce hazards caused by reflections traveling backward through the system (ghost images).

Anti-reflection coatings are especially important if the system contains many transmitting optical elements. Our experience has let us reach spectacular results with high power systems. We are using high-quality substrate materials as well as top-quality coatings for our AR Coated Windows.


Our designed and in-house-made coatings provide two main benefits:

  • prevents any backscattering and reflections from the workpiece and
  • further increases process efficiency by minimizing windows reflective losses

Generally, this allows us to offer items that can undergo power rates exceeding several kW. Some of the most popular protective windows are ready off the shelf. If not, Altechna can prepare AR Coated Windows according to your system. Contact us for more information.


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