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| Category | Parameter | Value / Description | Notes |
|---|---|---|---|
| Basic Information | Product Name | Sapphire Glass Optical Window | - |
| Material | Composition | Single Crystal α-Aluminium Oxide | - |
| Physical | Mohs Hardness | 9 | Second only to diamond |
| Physical | Density | 3.97 - 3.99 g/cm³ | - |
| Thermal | Melting Point | 2040 °C | - |
| Thermal | Max Operating Temp | 1900 °C (Inert) / 1000 °C (Air) | - |
| Optical | Transmission Range | 0.15 μm - 5.5 μm | Deep UV to Mid-IR |
| Optical | Refractive Index | no = 1.768 / ne = 1.760 | @587.6 nm |
| Surface | Flatness | λ/10 @ 632.8nm | High Precision |
| Surface | Surface Finish | 10-5 Scratch-Dig | MIL-PRF-13830B |