Metallic Mirrors
Metallic Mirrors are usually coated with Protected Aluminum, Enhanced Aluminum, UV Enhanced Aluminum, Protected Gold and Protected Silver, and they are have different reflectivity in different wavelength rang.
| Specifications | General Precision | High Precision | |
|---|---|---|---|
| Material | BK7, Fused Silica or others |  |
|
| Dimension Tolerance | +0.0, -0.2mm | +0.0, -0.05mm | |
| Clear Aperture | >85% | >90% | |
| Flatness | λ/4@632.8nm | λ/8@632.8nm | |
| Surface Quality | 60-40 | 20-10 | |
| Parallelism | 3 arc min | 3 arc sec | |
| Bevel | 0.25mm x 45° | ||
| Coating | Polished and Metallic coating just on one surface, fine ground on the other surface | ||
| Coating Types | Reflectivity |
|---|---|
| UV Enhanced Aluminum | Ravg > 86% from 250nm to 400nm |
| Protected Aluminum | Ravg > 87% from 400nm to 800nm |
| VIS Enhanced Aluminum | Ravg > 93% from 450nm to 750nm |
| Protected Silver | Ravg > 95% from 400nm to 20um |
| Protected Gold | Ravg > 98% from 650nm to 16um |
