Material : ZnSe Zinc Selenide Diameter tolerance : +0.0/-0.1 Thickness tolerance : +/-0.2 Parallelism difference : 10" Surface Accurancy : λ/10@632.8nm Defect :10-5 Chamfer of edge : 0.2~0.5x45 degree Roughness : Ra 0.1nm Size : As requested Please email your request " sales@boyanoptical.com " for more details .
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