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    4. 福州高特光电科技有限公司

      Used as transparent barriers for sending and receiving light between two phases under varying conditions in temperature pressure chemical composition cleanliness and phase. Windows of synthetic optical sapphire crystal are highly abrasion-resistant with hardness approaching that of diamonds. The material allows transmission of light in the range from ultraviolet to near-infrared.

       

      Standard Specifications
       

      Items
      Standard Precision
      High Precision
      Material
      Anisotropic crystalline synthetic sapphire
      Density
      3.98 g/cm3
      Refractive Index
      1.833 (265nm)
      1.793 (365nm)
      1.785 (405nm)
      1.76 (630nm)
      1.755 (1014nm)
      Diameter
      Ф 5 mm – Ф 50.8 mm
      Dimension Tolerance
      +0.0/-0.2 mm
      +0.0/-0.05mm
      Thickness Tolerance
      ± 0.2 mm
      ± 0.05mm
      Clear Aperture
      > 90%
      Parallelism
      < 3 arc minutes
      < 10 arc seconds
      Flatness
      λ at 632.8 nm
      λ/4 at 632.8 nm
      Surface Quality
      scratch and dig 60-40
      scratch and dig 40-20
      Bevel
      0.5 (0/-0.3) mm

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