Single crystal sapphire possesses a unique combination of excellent optical, physical and chemical properties. The hardest of the oxide crystals, sapphire 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 is required. Sapphire is anisotropic hexagonal crystal. Its properties depend on crystallographic direction (relative to the optical C-axis).
Features:
Transmission in 0.3-5.0μm, no absorption in 2-3μm
Extremely hard and durable
High thermal conductivity
High bulk damage threshold
Specifications:
| Material: | Sapphire |
| Dimension Tolerance: | +0.0, -0.1mm |
| Thickness Tolerance: | ± 0.1mm |
| Surface quality: | 80/50 |
| Clear Aperture: | >85% |
| Flatness: | λper 25mm |
| Parallelism: | 3' |
| Bevel: | <0.25mm X 45° |
| Coating: | Upon requirement |
Typical Sizes:
|
Round Shape |
Φ5.0；Φ10.0 ；Φ12.7；Φ15.0；Φ20.0； Φ25.4；Φ30.0；Φ38.1；Φ50.8；Φ76.2 |
|
Square Shape: |
5.0x5.0 ；10.0x10.0 ；15.0x15.0 ； 20.0x20.0；25.0x25.0；50.0x50.0 |
|
Thickness(mm): |
0.5；1.0；1.5；2.0；3.0； 4.0；5.0；6.0；8.0；10.0 |
How to order Windows?
Example:
Material:N-BK7
Diameter:Φ25.4+0.0/-0.1mm
Thickness:1.0±0.1mm
Surface quality: 60-40 S/D
Flatness: λ/2 per 25mm @633nm
Paralelism: <1 arc minute
Coating:Both side AR,R<0.25% @1064nm, AOI=0°