| These mirrors provide a high reflectance over a very broad spectral bandwidth. They are manufactured by coating first with a reflective metal film and then with a dielectric overcoat for protection and enhancement of the reflectivity. Coatings offered include aluminum, silver and gold. Each has a different spectral characteristic as shown in the curves. Aluminum provides a good general purpose visible range mirror. Silver has a very high reflectance over the visible and near infra-red range and gold is the preferred coating for infra-red applications at wavelengths greater than 2 microns. We use only highly polished laser grade substrates with /10 surfaces and low scatter. Unlike dielectric coatings, these mirrors can be used over a wide range of angles of incidence. However, they do affect the state of polarization of the reflected beam. |
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| Material | UV grade fused silica, BK7 |
| Size | 5mm-220mm |
| Dimension Tolerance | +0.0/-0.2mm |
| Flatness | 1/10λ－1λ |
| Wedge Tolerance | <3 min |
| Surface Quality | 10/5－80/50 |
| Chamfer | 0.2mm at 45°typical |
| Coating | as requested |
