Sapphire Physical Properties
| Crystal Symmetry Hexagonal |
|
System |
|
| Lattice constant |
A |
a =4.75 ;
c =12.97 |
| Transparence range |
μm |
0.18- 4.5 |
| Density |
g/cm3 |
3.98 |
| Mohs hardness |
|
9 |
| Melting point |
oC |
2030 |
| Thermal conductivity |
W/m/K |
0.04 |
| Expansion coefficien |
10-6/K |
8.4 |
| Refractive Index |
1.0 μm |
1.755 |
Sapphire Window
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.
High Precision Sapphire Windows
| Material: |
Sapphire |
| Clear Aperture: |
85% |
| Flatness: |
<l/4 |
| Parallelism: |
<1 arc minute |
| Surface Quality: |
40/20 |
| Bevel: |
0.25mm x 45° |
| Coating: |
Available upon request |
Standard Sapphire Windows
| Material: |
Sapphire |
| Clear Aperture: |
85% |
| Flatness: |
1 l per 25mm @633nm |
| Parallelism: |
<3~5 arc minutes |
| Surface Quality: |
60/40 |
| Bevel: |
0.25mm x 45° |
| Coating: |
Available upon request |
Standard Product Information
High Precision |
Standard Precision |
| f ± 0.1 (mm) |
T±0.2 (mm) |
f ± 0.1 (mm) |
T ± 0.2 (mm) |
10.0 |
6.0 |
10.0 |
3.0 |
25.0 |
6.0 |
15.0 |
3.0 |
50.0 |
10.0 |
25.0 |
3.0 |
| |
|
50.0 |
3.0 |
