Sapphire Windows
Sapphire window retains its high strength at high temperatures, has good thermal properties and excellent transparency. It is chemically resistant to common acids and alkali at temperatures up to 1000°C as well as to HF below 300 °C. These properties encourage its wide use in hostile environments where optical transmission in the range from the vacuum ultraviolet to the near infrared.
| Specifications | Standard | High Precision |
|---|---|---|
| Material | Sapphire Crystal | |
| Dimension Tolerance | +0.0/-0.2mm | +0.0/-0.02mm |
| Thickness Tolerance | +0.0/-0.2mm | +0.0/-0.05mm |
| Flatness | λ/2@632.8nm | λ/10@632.8nm |
| Surface Quality | 60-40 | 40-20 |
| Clear Aperture | >85% | >90% |
| Parallelism | 1 arc min | 10 arc sec |
| Bevel | 0.25mm x 45° | |
| Coating | Uncoated, AR, HR, PR, etc. | |
Note: Other sizes, material and coating are available upon request.
