Sapphire Window has a excellent transmission in range: 180—4500nm. And the reflective index is 1.77 @1000nm.
The sapphire part is the best choose to withstand strong pressure in optical system.
It is widely used in IR sensors, thermal image, medical and optical measurement systems
| Specifications: | |
| Material | Anisotropic synthetic sapphire crystal (Al2O3) |
| Diameter Tolerance | +0.0/-0.1mm |
| Thickness Tolerance | ±0.2mm |
| Clear Aperture | >Central 85% of diameter |
| Surface Quality | 60-40 S/D |
| Parallelism | < 1 arc minute |
| Wavefront Distortion | λ/4 per 25mm @632.8nm |
| Protective Bevel | <0.25mm x 45° |
| Coating | Uncoated |
| Sapphire Window Standard Products: | ||
| Part No. | φ(mm) | T(mm) |
| 12.7 | 2.0 | |
| 25.4 | 3.0 | |
Note:
Other sizes and coatings are available upon request.
The general tolerance specifications above provide a guideline regarding manufacturing capabilities for optics.
The manufacturing limits are not absolute; tighter tolerances may be possible.
Part specific tolerances may vary depending on component size, shape, and/or material.