Specifications:Material:QuartzDiameterTolerance:+0.0,-0.1mmWavefrontDistortion:l/8@633nmRetardationTolerance:l/300Parallelism:1arcsecondSurfaceQuality:20/10ClearAperture:90%Coating:S1S2:R0.2%@wavelength*SingleSpecifications:Material:QuartzDiameterTolerance:+0.0,-0.1mmWavefrontDistortion:l/8@632.8nmRetardationTolerance:l/300Parallelism: 1arcsecondSurfaceQuality:20/10ClearAperture: 90%Coating:S1 S2:R 0.2%@wavelengthSinglePlateWideAngleAcceptanceBetterTemperatureBandwidthWideWavelengthBandwidthHighDamageThresholdThinThickness:0.04~0.09micronsStandardwavelength:l/4:1480nm,1550nml/2:980nm,1064nm,1310nm,1480nm,1550nm