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| Category | Parameter Name | Description / Typical Value | Notes |
|---|---|---|---|
| Basic Info | Product Name | Sapphire Glass Optical Window | - |
| Composition | Material | Single Crystal α-Aluminium Oxide | High Purity |
| Structure | Crystal System | Hexagonal Crystal System | Anisotropic |
| Physical | Density | 3.97 - 3.99 g/cm³ | - |
| Physical | Mohs Hardness | 9 | Second only to diamond |
| Physical | Knoop Hardness | ~2000 kg/mm² | Load 100g |
| Thermal | Melting Point | 2040 °C | Excellent thermal stability |
| 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 | Surface Quality | 10-5 Scratch-Dig | High Precision |