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    4. 福州高特光电科技有限公司

      CaF2 windowCalcium Fluoride is good choice for optical windows in the 0.15 μm - 9 μm range,which is relatively soft and somewhat hygroscopic so polishing, coating and handling are more critical than UV Fused Silica windows. In addition, The quality of a UV window can be extremely critical, it should be of high purity and polish in order not to affect the optical system.
      Calcium Fluoride Windows are also applicable for a wide range of spectrum. It is particularly useful for wavelength at 2980nm laser application.
      Due to its low refractive index, Calcium Fluoride can be used without anti-reflection coating
       

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