Sapphire Windows
Description:
Sapphire window is made from synthetic sapphire and can be made much thinner than BK7 windows. It is highly durable with a wide transmission range. Sapphire window is best suited for scratch resistance application that requires better transmission over a wide range spectrum.
Specifications:
| Diameter (Φmm) | 8.0, 10.0, 12.7, 15.0, 20.0, 25.4, 30.0 |
| Thickness (mm) | 0.5, 1.0, 2.0 |
| Diameter Tolerance (mm) | +0.0/-0.2 (General), +0.0/-0.1 (High Precision) |
| Thickness Tolerance (mm) | ±0.2 (General), ±0.05 (High Precision) |
| Clear Aperture | >75% (Small Size), >90% (Large Size) |
| Parallelism | 3 min. (General), 10 sec. (High Precision) |
| Surface Quality: Scratch/Dig | 80/50 (General), 40/20 (High Precision) |
| Flatness (per 25mm@633nm) | λ(General), λ/4 (High Precision) |
| Bevel (face width x 450) | <0.25mm |
| Coating | Upon customer’s request |