Commercial Quality Windows, Square, G1 Commercial Grade Fused Quartz

Esco PN:
  • $ 1155

Diameter Tolerance

+/- 0.125 mm

Thickness Tolerance

+/- 0.125 mm

Surface Accuracy

≤ 2λ per inch

Surface Quality

60-40 Scratch-Dig or better




Fine ground and safety beveled*

Clear Aperture


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

Commercial windows used for sight glasses, instrument windows, beamsplitter substrates, vacuum windows, welding window substrates. Esco carries inventory of square commercial optical windows made from G1 Commercial grade fused quartz. The G1 coding refers to the Striae (per MIL-G-174A) C-D, Index Variation ∆n(x10-620.

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 modification would cost. 


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