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        CaF2 Windows are made from Calcium Fluoride material, which has transparent range from 170-7800nm. The refractive index is 1.399 at 5000nm. It has little hygroscopic susceptibility and high thermal expansion coefficient. CaF2 Windows are relatively soft and somewhat hygroscopic so polishing, coating and handling are more critical than UV Fused Silica windows.

        Specifications:
        Material: --------------------------------------------------------- Calcium Fluoride single crystal
        Diameter Tolerance: ------------------------------------------ +0.0, -0.1mm
        Thickness Tolerance: ---------------------------------------- ±0.2mm
        Clear Aperture: ------------------------------------------------->80%
        Parallelism:------------------------------------------------------- 1 arc minute
        Flatness:----------------------------------------------------------- λ/2 @ 632.8 nm
        Surface quality: ------------------------------------------------- 80/50 for general and 40/20 scratch and dig  for high precision

        Protective Bevel:--------------------------------------------------<0.25x45deg

        Coating:-------------------------------------------------------------Uncoated


         

        Part No.
         Dia(mm)
        T(mm)
        WIN4-101
        10.0
        0.5
        WIN4-102
        12.7
        2.0
        WIN4-103
        12.7
        3
        WIN4-201
        25.4
        3.0
        WIN4-202
        25.4
        4
        WIN4-301
        38.0
        5.0
        WIN4-501
        50.0
        3.0
        WIN4-502
        50.0
        4

         

        Note: Other sizes and coating request are available upon request.


           PDF to download

         
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