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The laser mirrors can be custom made to include the following range: 1 YAG laser mirrors (High power grade) 2 Excimer laser mirrors (High power grade) 3 Argon-ion laser mirrors (High power grade) 4 Diode & broadband (Ti:Sapphire) These mirrors are made from vacuum depositing thin films of material that have differing refractive indices & thickness onto suitable substrates. Typical custom laser mirror substrates are calcium fluoride, germanium, sapphire, fused silica and Zinc Selenide which produce a high efficiency reflecting surface at the laser wavelength. The coatings are assembled assuming that the mirror will be working in the plane of incidence. This is essential as any off-axis angles will push the pass band toward the shorter waveband that could be beyond the pass band for one or both polarizations (s and p). If off-axis reflections are needed, such as at 90°, then this coating needs to be applied for an Angle of Incidence (AOI) of 45°. READ PDF FOR MORE INFO .. Thickness::2mm to 10mm+ Parallelism::< 3 arcseconds Surface form: :< 10:5 Peak reflectivity: > 99.8% Material options: :Fused silica, BK7 or equivalent Coating options: :Argon-Ion, Eximer, Nd:YAG, Diode Laser