D25.4mm Metal Coated Flat Mirror for Laser Cutting Machine

Technical mirrors may use a silver, aluminium, or gold coating (the latter typically forinfraredmirrors), and achieve reflectivities of 90-95% when new. A protective transparentovercoat may be applied to preventoxidationof the reflective layer.The simplest optical coatings are thin layers ofmetals, such asaluminium, which are deposited on glass substrates to make mirror surfaces, a process known assilvering. The metal used determines the reflection characteristics of the mirror; aluminium is the cheapest and most common coating, and yields a reflectivity of around 88%-92% over thevisible spectrum. More expensive issilver, which has a reflectivity of 95%-99% even into the farinfrared, but suffers from decreasing reflectivity (<90%) in the blue andultravioletspectral regions. Most expensive isgold, which gives excellent (98%-99%) reflectivity throughout theinfrared, but limited reflectivity at wavelengths shorter than550nm, resulting in the typical gold colour.
Super Broadband Working Wavelength
Insensitive to Angle of Incidence & Polarization
RoHS compliant
Specifications:MaterialBK7
Dimension tolerance+0/-0.2mmThickness tolerance±0.2mmClear Aperture>90%Surface Quality60/40 sctrach and digChamferProtected <0.5mmx45degCoating
metal coating on one surface, rear surface ground or inspection polished
Enhanced Aluminum: Ravg>90%@400-700nm
Protected Aluminum: Ravg>87%@400-1200nm
Protected Silver: Ravg>95%@400-12000nm
Protected Gold: Ravg>98%@2000-12000nmDamage threshold>1J/cm2, 20ns, 20Hz, @1064nm
Standard Products:Part NumberMaterialDiameter (mm)Thickness (mm)Flatness @ 633nmWavelength (nm)EALD12.7T3BK712.73.0λ/10EnhancedAluminumEALD25.4T3BK725.43.0λ/4EnhancedAluminumEALD25.4T6.35BK725.46.35λ/10EnhancedAluminumEALD50.8T3BK750.83.0λ/4EnhancedAluminumEALD50.8T6.35BK750.86.35λ/10EnhancedAluminumPALD12.7T3BK712.73.0λ/10ProtectedAluminumPALD25.4T3BK725.43.0λ/4ProtectedAluminumPALD25.4T6.35BK725.46.35λ/10ProtectedAluminumPALD50.8T3BK750.83.0λ/4ProtectedAluminumPALD50.8T6.35BK750.86.35λ/10ProtectedAluminumPAGD12.7T3BK712.73.0λ/10Protected SilverPAGD25.4T3BK725.43.0λ/4Protected SilverPAGD25.4T6.35BK725.46.35λ/10Protected SilverPAGD50.8T3BK750.83.0λ/4Protected SilverPAGD50.8T6.35BK750.86.35λ/10Protected SilverPAUD12.7T3BK712.73.0λ/10Protected GoldPAUD25.4T3BK725.43.0λ/4Protected GoldPAUD25.4T6.35BK725.46.35λ/10Protected GoldPAUD50.8T3BK750.83.0λ/4Protected GoldPAUD50.8T6.35BK750.86.35λ/10Protected Gold