Product Name: High Transmittance Ar Coated Optical Ge Germanium Window Coating: HC Customized: Customized Lenses Color: Grey Material: Ge Shape: Single-lens Transmittance: 90%-95% Type: Flat Lens Usage: Optical Trademark: Realpoo Transport Package: Protective Packing Specification: custom design Origin: Changchun HS Code: 9001909090 Product Description GermaniumisahighindexmaterialthatisusedtomanufactureAttenuatedTotalreflection(ATR)prismsforspectroscopy.Itsrefractiveindexissuchthatgermaniummakesaneffectivenatural50%beamsplitterwithouttheneedforcoatings.Germanium(Ge)OpticalComponentsareusedinmanyInfrared(IR)applicationsorsystems,includingthermalimaging,spectroscopy,orwithmonochromaticlightsourcessuchasquantumcascadelasers.German(Ge)OpticalComponentsareOpticalComponentsdesignedforhighperformanceintheInfrared(IR)spectrumwithouttheuseofInfrared(IR)anti-reflectioncoatings.TheKnoopHardnessofgermanium(780)isapproximatelytwicethatofmagnesiumfluoride,makingitidealforinfraredapplicationsrequiringruggedoptics.Germaniumissubjecttothermalrunaway,meaningthatthetransmissiondecreasesastemperatureincreases.Assuch,germaniumwindowsshouldbeusedattemperaturesbelow100°C. Germanium'shighdensity(5.33g/cm3)shouldbeconsideredwhendesigningforweight-sensitivesystems. Windowsaretypicallyavailabeinavarietyofsizes,contactusforavailability.Specificationsof prism: SubstrateGermanium(Ge)DiameterTolerance(mm)+0.0/-0.1ClearAperture(%)90Thickness(mm)0.5-1.5ThicknessTolerance(mm)0.1SurfaceQuality60-40SurfaceAccuracy1/10@10.6μmParallelism(arcminutes)<1Density(g/cm3)5.33KnoopHardness(kg/mm2)780DiameterGermanium(Ge)Coating8-12μmTypeProtectiveWindowWavelengthRange(μm)2.0-16.0μmDamageThreshold0.5J/cm2(10.6µm,100ns,1Hz,Ø0.478mm)