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Materials >>Silicon>> Silicon windows catalog

Silicon windows. Silicon windows catalog.

Welcome to Silicon windows catalog page. We offer two types of Silicon windows: Czochralsky and Float-zone material.

  • Transmission from 1.2 - 7m
  • Available Uncoated or AR or DLC Coated for 3-5 m (MWIR)
  • Ideal for Weight Sensitive Application
  • Cheaper than Germanium and ZnSe

High Precision Silicon windows:

We can provide up to 300 mm diameter Silicon windows with S/D 20/10; Flatness 0.25 waves at 633 and parallelism up to 10 arc. sec. Custom sizes, specifications, AR and DLC coating are available.

Thin Floatzone Silicon windows with 0.5-1mm thick can be used for 8-12m spectral range with suitable AR coating.

Contact us for quotation of your custom Si window or Si wedge and save up to 50% from major optical catalog price!

Cat# Dia, in Dia,mm TH, in TH, mm
SI-W-6.35-0.5 0.25 6.35 0.019 0.5
SI-W-12.7-1 0.5 12.7 0.039 1.0
SI-W-12.7-2 0.5 12.7 0.079 2.0
SI-W-18.5x18.5x0.4 0.73x0.73 18.5x18.5 0.016 0.4
SI-W-25.4-1 1 25.4 0.039 1.0
SI-W-25.4-2 1 25.4 0.079 2.0
SI-W-25.4-3 1 25.4 0.118 3.0
SI-W-25.4-4 1 25.4 0.157 4.0
SI-W-25.4-5 1 25.4 0.197 5.0
SI-W-25.4-6 1 25.4 0.236 6.0
SI-W-38.1-1 1.5 38.1 1.0
SI-W-38.1-3 1.5 38.1 0.118 3.0
SI-W-38.1-4 1.5 38.1 0.157 4.0
SI-W-38.1-5 1.5 38.1 0.197 5.0
SI-W-38.1-6 1.5 38.1 0.236 6.0
SI-W-50.8-1 2 50.8 1.0
SI-W-50.8-3 2 50.8 0.118 3.0
SI-W-50.8-4 2 50.8 0.157 4.0
SI-W-50.8-5 2 50.8 0.197 5.0
SI-W-50.8-6 2 50.8 0.236 6.0
SI-W-63.5-3 2.5 63.5 0.118 3.0
SI-W-63.5-6 2.5 63.5 0.236 6.0
SI-W-76.2-3 3 76.2 0.0.118 3.0
SI-W-101.6-6 4 101.6 0.236 6.0
SI-W-127-6 5 127 0.236 6.0
SI-W-152.4-6 6 152.4 0.236 6.0
SI-W-177.8-10 7 177.8 0.394 10.0
SI-W-203.2-10 8 203.2 0.394 10.0
Silicon windows up to 300mm diameter are available on request. Silicon windows with yellow mark are available in stock and can be shipped within 1-2 weeks. Ask now.

Standard specifications:
Diameter tolerance: +0/-0.1mm;
thickness tolerance: +/-0.1mm;
Clear Aperture: 90%;
Parallelism: 3 arc min;
Flatness: 4 fringes or by request
Surface finish: S/D 60/40

Silicon (Si) Windows manufactured from optical grade silicon are popular for the 1.2 - 7m spectral region due to their low cost (1/10 of Germanium and ZnSe price) and low density. Due to its low density (half that ofGermaniumorZinc Selenide), Silicon windows is ideal for weight sensitive applications, especially those in the 3 - 5m region. Density is 2.329 g/cm3and Knoop Hardness is 1150, making it harder and less brittle than Germanium.