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ISP Optics Sapphire Windows

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  • High Corrosion Resistance and Thermal Stability
  • Higher Durability than Glass Windows
  • Transmission from 0.33 – 5.5µm

Common Specifications

Bevel:
Protective as needed
Clear Aperture (%):
85
Edges:
Fine Ground
Knoop Hardness (kg/mm2):
1900
Parallelism (arcmin):
<3
Poisson's Ratio:
0.27
Young's Modulus (GPa):
435
Abbe Number (vd):
72.24
Axis Orientation:
Random
Birefringence (no-ne):
0.008 for Visible Light Orthogonal to Optical Axis
Coating:
Uncoated
Index of Refraction (nd):
1.77
Substrate:
Sapphire (Al2O3)
Surface Flatness (P-V):
2λ per 25.4mm
Surface Quality:
60-40
Wavelength Range (nm):
330 - 5500
Coefficient of Thermal Expansion CTE (10-6/°C):
8.8
Density (g/cm3):
3.97

Products

Dia. (mm)  Thickness (mm)   Coating   Model Number   Compare   Stock Number   Price  Buy
25.40 1.00 Uncoated AL-W-25-1
25.40 3.00 Uncoated AL-W-25-3
38.10 2.00 Uncoated AL-W-38-2
38.10 3.00 Uncoated AL-W-38-3
63.50 5.00 Uncoated AL-W-63-5

Product Details

ISP Optics Sapphire Windows are highly durable and transmissive protective windows that are ideal for harsh environments. Sapphire is chemically inert, insoluble in water, and resistant to common acids and alkalis. Chemically, sapphire is single crystal aluminum oxide (Al2O3) and is useful in a transmission range from 0.33 – 5.5µm when uncoated. ISP Optics Sapphire Windows feature a Knoop Hardness of 1900 and are are resistant to scratches, digs, and fractures that might otherwise weaken fused silica substrates. These windows are often used in applications with high temperatures and pressure such as viewports for vacuum or plasma chambers.

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