Commercial Quality Windows, Circular, N-BK7 Optical Glass

Esco PN:
  • $ 1210


Diameter Tolerance

+/- 0.125 mm

Thickness Tolerance

+/- 0.125 mm

Surface Accuracy

1.0-3.0 mm thickness ≤ 5λ per inch
4.76-12.7 mm thickness ≤ 2λ per inch

Surface Quality

60-40 Scratch-Dig or better

Parallelism

<15'

Edges

Fine ground and safety beveled*

Clear Aperture

90%


*parts under 25.4mm in diameter may not have beveled edges

Commercial windows are used for sight glasses, instrument windows, beamsplitter substrates, vacuum windows, welding window substrates. Esco carries a complete inventory of circular commercial optical windows of N-BK-7 Optical Glass. Windows are polished both sides with ground edges.

Don't see a part that matches exactly what you need, perhaps you'd like to modify a dimension or add a coating?  Use our fast online quote tool to find out what a custom part would cost. 

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ITAR registered and compliant, Esco manufactures ITAR optics for all of its customers with the strictest confidentiality.