External Transmission of SI mirror of 10 mm thickness
Specifications
|
Material |
Silicon (Si) |
|
Density, g/cm3 |
2,33 |
|
Surface quality |
40-20 scratch & dig (MIL-PRF-13830B) |
|
Clear aperture |
>80% of diameter |
|
Diameter tolerance |
+0.0 -0.2 mm |
|
Thickness tolerance |
±0.25 mm |
|
Surface flatness |
λ/4 @ 633 nm |
|
Operation wavelength |
10.6 µm |
|
Coating |
protected gold |
|
Reflectivity for unpolarised radiation |
> 99% |
| EKSMA Optics Silicon Optical Components
79.94 kB |
Coated silicon substrates are most commonly used as mirrors for CO2 lasers. Its advantages are good durability, thermal stability and relatively low cost. The total reflectors are used as rear reflectors and fold mirrors externally as beam benders in beam delivery systems.