Product Name: Germanium Windows for Thermography, Optical Window Model NO.: D5~D300mm Coating: Ar Customized: Customized Certification: ISO9001 Lenses Color: Clear Material: Germanium Shape: Single-lens Transmittance: >95% Type: Flat Lens Usage: Optical Trademark: ICC Origin: Qinhuangdao China HS Code: 9001909090 Product Description Germanium windows used as transparent barriers for sending and receiving light between two phases under varying conditions in temperature, pressure, chemical composition, cleanliness, and phase.Germanium transmits in the IR range, from 1.8µm to 23µm,at which Germanium offers higher internal transmittance. Moreover, IR transmitting materials are generally much more expensive than their visible light counterparts so it is very important to select the right material for each specific application.Non-coated and AR coated products are available.Specification:Materials Optical Grade GermaniumDimensional Tolerance± 0.1mmFlatnessλ/2 @ 632.8nmSurface Quality40 ~ 20Clear Aperture85%AR coating Specified by customerCustom Sizes & OptionsDiameters:5mm to 200mmSquares/Rectangles:5mm to 140mmThickness:0.50mm to 25mmSurfaces:80/50 to 40/20Diameter/Thickness:ToL Up to 0.02mmMaterials:Polycrystalline, Mirror & FloatzoneCoatings:Anti-reflectionDia(mm)Thickness(mm)Wavefront DistortionSurface QualityProduct Number10.02.0Lambda/440-20ICC-WNGH010112.72.0Lambda/440-20ICC-WNGH010218.02.0Lambda/440-20ICC-WNGH010325.43.0Lambda/440-20ICC-WNGH010438.103.0Lambda/240-20ICC-WNGH0105