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        Your present location:产品首页 >> PRUDUCTS >> Optical Dome >> Big Dome
        • Name: Big Dome
        • 产品编号: WHK-DM003
        • date: 2017-09-22
        • Views : 49

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        Sapphire (Al2O3) Single Crystal

        Domes & Hyper Hemispheres

         

        Single crystal sapphire Al2O3 has an unique combination of excellent optical, physical and chemical properties:

        - Transmission band > 85% (0,17-5,5 μm)

        - Melting point 2050 °C

        - Mohs hardness 9

        - Density 3,98 g/cm²

        - Ref. index 1,75 at 0,588 μm

         

         

        Specification of polished sapphire domes and hyper hemispheres

        Parameter

        Value

        Domes Diameter(mm)

        Ø < 100

        100 ≤ ø ≤ 300

        Diameter tolerance(mm)

        ± 0,1

        ± 0,2

        Domes Radius of curvature R (mm)

        3 ≤ R ≤ 150

        Radius Tolerance(mm)

        ± 0,05

        ± 0,1

        Domes Height (mm)

        h ≤ 1,4 R

        Height Tolerance(mm)

        ± 0,1

        ± 0,2

        Tolerance Wall Thickness(mm)

        ≥ 2

        ≤ 15

        The Surface Roughness Ra, μm

        60-40

        80-50

         

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