YAG Optical Crystals

YAG optical crystalsUndoped Yttrium Aluminium Garnet (Y3Al5O12 or YAG) is a new substrate and optical material that can be used for both UV and IR optics. It is particularly useful for high-temperature and high-energy applications. The mechanical and chemical stability of YAG is similar to that of Sapphire,Website:, but YAG is not birefringent. This particular feature is extremely important for some optical applications.Features:Transmission in 0.25-5.0mm, no absorption in 2-3mmHigh thermal conductivity, 10 times better than glassesExtremely hard and durableNon-birefringenceStable mechanical and chemical propertiesHigh bulk damage thresholdHigh index of refraction, facilitating low aberration lens designSpecificationParameters of MaterialsMaterialsY3Al5O12Crystal Structure:Cubic [111]Moh Hardness:8-8.5Melting Point:1950°CDensity:4.55 g/cm3Thermal Conductivity:0.14 W/ cm°Cdn/dt:7.4 x 10-6 oC-1Thermal Expansion:6.9 x 10-6 oC-1Polishing Specification for Laser GradeⅠOrientation Tolerence< 0.5°Thickness/Diameter Tolerance±0.1 mmSurface Flatness<λ/8@632nmWavefront Distortion<λ/4@632nmSurface Quality20/10Parallel30〞Perpendicular15ˊClear Aperture>90%Chammfer<0.2×45°Polishing Specification for Laser Grade ⅡOrientation Tolerence< 0.2°Thickness/Diameter Tolerance±0.02 mmSurface Flatnessλ/10@632nmWavefront Distortion<λ/8@632nmsurface Quality10/5Parallel10〞Perpendicular5ˊClear Aperture>90%Chammfer<0.2×45°

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