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).

And also manufactures sapphire windows with a side step polishing and the windows with an internal polished bore. Windows can be made also from other optical materials, at the request of the customer with a high degree of plane-parallel.


Material

Sapphire

Quartz glass & other optical materials

Flatness

Up to λ/8

Up to λ/8

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.