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Stepped windows

Product : Stepped windows

ARD-Optics manufactures stepped windows of different shapes, from simple round to complicated configuration at the customer’s request (round, oval, rectangular and mixed).

We also manufactures sapphire windows with a side step polishing and the windows with an internal polished hole. At the request of the customer, windows can be made also from other optical materials, with high degree of plane-parallelism.

Meterial Sapphire Quartz glass & other optical
materials
Flatness
Up to λ8
Up to λ8
Surface quality S/D MIL-13830
20/10
20/10
Step surface
Polished/

Grinded
Polished/

Grinded
Side surface
Polished/

Grinded
Polished/

Grinded
Step width
1-10 mm
1-10 mm
Radius of rounding at inner
angle of step
Up to 0.2 mm
Up to 0.2 mm
Parallelism
Up to 3 arc min.
Up to 3 arc min.