Date: 24th June 2016
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:http://www.meta-laser.com, 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 Grade?Orientation Tolerence< 0.5?Thickness/Diameter Tolerance?0.1 mmSurface Flatness/8@632nmWavefront Distortion/4@632nmSurface Quality20/10Parallel30?Perpendicular15?Clear Aperture>90%Chammfer<0.2?45?Polishing Specification for Laser Grade ?Orientation Tolerence< 0.2?Thickness/Diameter Tolerance?0.02 mmSurface Flatness?/10@632nmWavefront Distortion/8@632nmsurface Quality10/5Parallel10?Perpendicular5?Clear Aperture>90%Chammfer<0.2?45?
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