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| Coad | 669641 | Substrate | Borofloat 33 | |
| Type | Metallic Coated Flat Mirror | Diameter(mm) | 50.80 | |
| Clear Aperture | 90% CA | Diameter Tolerance | +0.0/-0.2mm | |
| Parallelism | - | Thickness(mm) | 3.20 | |
| Quantity | 1 | Thickness Tolerance | ±0.20mm | |
| Surface Quality S1 | 60-40 | Wavelength(nm) | 480 - 20000 | |
| Surface Quality S2 | Fine Polishing | AOI(°) | 0 - 45 | |
| Inclination Angle | - | Surface Flatness | 5λ@633nm | |
| Laser Damage Threshold | - | Coating Type | Silver Coating (with Silicon Dioxide Protection Layer) | |
| Coating Specifications | Ravg>96.5%@480-2000nm,Ravg>96%@2000-20000m | |||
Metal-coated mirrors are highly suitable for beam deflection in broadband light sources, offering high reflectance across a wide spectral range. However, metallic coatings are prone to oxidation, discoloration, or peeling in high-humidity environments. To prevent this, LBTEK’s metallic-coated mirrors are coated with a layer of silicon dioxide protection film, isolating the metal coating from direct contact with air. While the protective layer helps prevent silver oxidation, silver-coated mirrors should still not be used in high-humidity environments. They must be used and stored in conditions with minimal humidity at room temperature. LBTEK offers metallic-coated mirrors with aluminum, silver, and gold coatings.
LBTEK offers economical silver-coated mirrors in Ø1/2 inch, Ø1 inch, and Ø2 inch sizes. The silver coating provides high reflectance across the 480 nm to 20 µm wavelength range. The surface of the silver mirror is coated with a SiO2 protective layer to prevent oxidation and damage to the coating. Although the protective layer helps prevent silver oxidation, silver-coated mirrors should not be used in high-humidity environments. They must be stored and used in conditions with minimal humidity at room temperature.
When using silver-coated mirrors, it is recommended to wear latex gloves or finger cots to prevent oils and residues from fingers from contaminating the optical surface. Care should be taken when handling the mirrors to avoid touching the mirror surface and edges.
Compared to standard silver-coated mirrors, economical silver-coated mirrors have lower surface quality, but they are also more affordable.
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