Precision Flat Windows, S1-UV Grade Fused Silica


Diameter Tolerance

+/- 0.125 mm

Thickness Tolerance

+/- 0.125 mm

Surface Quality

20-10, scratch-dig or better

Clear Aperture



Fine ground and beveled*

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

Precision Flat Windows, S1-UV Grade Fused Silica

Esco PN:
  • $ 7150

UV Fused Silica laser quality round windows range from 0.25 waves (λ/4) to 0.10 wave (λ/10) flat. Catalog parallel specifications are either 5" arc seconds or 10' arc minutes. Ideal for interferometer flats, laser windows, beamsplitter substrates, and parallel plates. 

Note: Flatness and Paralellism units are are expressed as (waves - arc min)


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