DescriptionTransparent ceramic spinel (Transparent Magnesium Aluminate spinel,Website:http://www.meta-laser.com, MgAl2O4 transparent spinel, MA polycrystalline spinel) is an attractive material for uses in a wide range of optical, electronic and structural applications including windows and lenses, which require excellent transmission from the visible through to the mid IR. Theoretical transmission is very uniform and approaches 87% between 0.3 to 5 microns. Transmission characteristics rival that of ALON and sapphire in the mid-wave IR, making it especially attractive for the ever-increasing performance requirements of current and next-generation IR imaging systems.SpecificationPolishing Specifications for Substrate GradeⅠOrientation Tolerence<30ˊThickness/Diameter Tolerance±0.10 mmSurface Flatness<(λ-2λ)@632nmSurface Quality(1.0-2.0)nmParallel10ˊPerpendicular60ˊChammfer<0.2×45°Polishing Specification for Substrate Grade ⅡOrientation Tolerence<18ˊThickness/Diameter Tolerance±0.05 mmSurface Flatness<(λ/2-λ/4)@632nmSurface Quality(0.3-1.0)nmParallel1ˊPerpendicular30ˊChammfer<0.2×45°Polishing Specification for Substrate Grade ⅢOrientation Tolerence<12ˊThickness/Diameter Tolerance±0.02 mmSurface Flatness(λ/4-λ/6)@632nmSurface Quality<0.3nmParallel45〞Perpendicular20ˊChammfer<0.2×45°