Silicon Windows
Description:
Silicon is transparent from 1µ to 7µ; this makes it useful in IR systems. Silicon is mainly used in the 3-5 micron wavelength.
Silicon also has a very high refractive index and so significant Fresnel reflection losses can be expected unless some AR coating is applied. Antireflective coatings will also prevent scratching on silicon substrates as silicon is soft and easily marked.
Specifications:
| Diameter (Φmm) | 8.0, 10.0, 12.7, 15.0, 20.0, 25.4, 30.0, 38.1, 50.8, 100.0 |
| Thickness (mm) | 1.0 ～ 50.0 |
| 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 | >80% (Small Size), >90% (Large Size) |
| Parallelism | 3 min. (General), 10 sec. (High Precision) |
| Surface Quality:Scratch/Dig | 60/40 (General), 10/5 (High Precision) |
| Roughness Ra (nm) | <1 nm |
| Flatness (per 25mm@633nm) | λ/2(General), λ/10 (High Precision) |
| Bevel (face width x 450) | <0.25mm |
| Coating | Upon customer’s request |
