BaF2 Optical Crystals
BaF2optical crystalsBaF2 (Barium Fluoride) is used forwindows,Website:, lenses and prisms, particularly when transmission into the ultraviolet is desired. The transmission range of BaF2 is from 0.2 to 14µm. Transmission in the VUV is degraded by prolonged exposure to moist atmosphere, but it is not significantly degraded by exposure to high energy radiation. Barium Fluoride is the most resistant fluoride to high energy radiation but does not have VUV transmission of other types. Barium Fluoride is suitable for applications in the IR band (8 to 14 µm) and is often used as an IRviewport windowfor thermographs. The material is relatively hard but is very sensitive to thermal schock. Barium fluoride is grown by vacuum Stockbarger technique. In addition,BaF2is usually used asscintillatorfor gamma detection. It is the fastest scintillating crystals up to now. Besides it can also be used as substrate for some applications.Features:Excellent transmission from 200nm to 7μm；The most resistant fluoride to high energy radiation;Sensitive to thermal shock;SpecificationPhysical PropertiesCrystal typecubicLattice constant, Åa=6.2001Density, g/cm34.89Melting point,℃1368Refractive index @ range, μm0.15-12Specifications for BaF2 windowsSurface quality60-40 S & DClear aperture90% of the diameterdiameter tolerance+0, -0.1 mmThickness tolerance±0.2Surface flatnessλ/2 @633 nmPolishing Specification for Optical GradeⅠOrientation Tolerence< 1°Thickness/Diameter Tolerance±0.10 mmSurface Flatness<(λ-2λ)@632nmWavefront Distortion<(2-4)λ@632nmSurface Quality80/50Parallel10ˊPerpendicular60ˊClear Aperture>90%Chammfer<0.2×45°Polishing Specification for Optical Grade ⅡOrientation Tolerence< 0.5°Thickness/Diameter Tolerance±0.10 mmSurface Flatness<(λ/2-λ/4)@632nmWavefront Distortion<(1-2)λ@632nmSurface Quality60/40Parallel1ˊPerpendicular30ˊClear Aperture>90%Chammfer<0.2×45°Polishing Specification for Optical Grade ⅢOrientation Tolerence< 0.2°Thickness/Diameter Tolerance±0.02 mmSurface Flatness(λ/4-λ/6)@632nmWavefront Distortion<(λ-λ/2)@632nmSurface Quality40/20Parallel45〞Standard productsMaterialProductsAperture diamensions, mmThickness,mmEnd surfaces orientationcoatingsProduct IDPriceBaF2Cross polarized wave generation10x100.5011 1011 1.5011 2011 2.5011 3011
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