Metal mirrors (Al Ag Au)
Metal mirrors (Al Ag Au) use high-purity aluminum, silver, and gold thin films deposited by vacuum deposition onto optical glass substrates to achieve broadband reflection. Aluminum (Al) mirrors cover the 250-2000nm band with reflectivity ≥97%, and are robust and durable. Silver (Ag) mirrors have >98% reflectivity in the visible and near-infrared bands (400-1500nm), with a protective coating to prevent oxidation. Gold (Au) mirrors have >99% reflectivity in the mid-infrared band (700-10μm) and offer excellent corrosion resistance. These mirrors are ideal for laser systems, spectrometers, and astronomical applications, and support customized coating thickness and wavelength ranges to meet specific optical requirements.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Material | N-BK7, UV fused silica, etc. |
| Typical Diameter (Ф) | 10.0 12.7 15.0 20.0 25.4 30.0 50.8 etc. |
| Dimensional Tolerance | ±0.1 mm |
| Thickness Tolerance | ±0.2 mm |
| Clear Aperture | >80 % |
| Parallelism [Standard type] | 3' (Standard Type) |
| Parallelism [High-Precision Type] | 1' (High-Precision Type) |
| Surface Quality [Standard] | 60/40 (standard) |
| Surface Quality [High Precision] | 10/5 (High-Precision) |
| Surface Figure (Per 25mm @633mm) [Standard; per 25mm @633mm] | λ/4 (standard) |
| Surface Figure (Per 25mm @633mm) [High-Precision; per 25mm @633mm] | λ/8 (High-Precision) |
| Chamfer [45°] | <0.25 mm x 45 ° |
| Coating | Polishing and metal coating on one surface only |
| Reflectance [Protected Aluminum；400nm to 800nm] | 400 nm to 800 nm Average over the Range > 87 % |
| Reflectance [VIS-enhanced Aluminum；450nm to 750nm] | 450 nm to 750 nm Average over the Range > 93 % |
| Reflectance [UV-enhanced Aluminum；250nm to 400nm] | 250 nm to 400 nm Average over the Range > 86 % |
| Reflectance [Protected Silver；400nm to 2000nm] | 400 nm to 2000 nm Average over the Range > 95 % |
| Reflectance [Protected Gold；650nm to 1600nm] | 650 nm to 1600 nm Average over the Range > 98 % |
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