Best prices high quality optical sapphire crystal glass window PropertySpecificationThickness0.5-50mmSize tolerance 0.02mm Edge Finish Ground and beveledSurface Quality 40-20 scratch-digSurface Flatnessλ/4 @ 633 nmParallelism ≤3 arc min (≤0.9 mrad)Clear Aperture &......
| Property | Specification |
| Thickness | 0.5-50mm |
| Size tolerance | 0.02mm |
| Edge Finish | Ground and beveled |
| Surface Quality | 40-20 scratch-dig |
| Surface Flatness | λ/4 @ 633 nm |
| Parallelism | ≤3 arc min (≤0.9 mrad) |
| Clear Aperture | >80% of central diameter |
| Hardness (Knoop) | 1370 kg mm-2 |
| Young's modulus | 3.4 x 1011 N m-2 |
| Thermal Limit | 22 W m-1 K-1 |
| Thermal expansion coefficient | 8.4 x 10-6 K-1 |






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