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    CUSTOM OPTICS
     
     
     
     
       
       
       

    CaF2(Calcium Fluoride)
    Product Information :

    Calcium Fluoride is used for optical windows, lenses and prisms in the 0.15 μm - 9 μm range. This material has found wide use in high power laser optics due to its low absorption. Polished surfaces are stable and will last several years under normal conditions. Due to its low refractive index, Calcium Fluoride can be used without anti-reflection coating.
    Calcium fluoride is grown by vacuum Stockbroker technique. Material for IR use is grown using naturally mined fluorite, in large quantities at relatively low cost.

    OPTICAL
    Transmission Range ...........................0.13 to 10 microns
    Refractive Index ...................1.39908 at 5 microns
    Reflection Loss ....................4% at 5 microns (2 surfaces)
    Restrahlen Peak ..............................................35 microns
    dN/dT ..................................-10.6 x 10-6e/°C

    PHYSICAL
    Density........................... 3.18 g/cm3

    Melting Point ..................................1360 °C
    Thermal Conductivity .............................9.71 W/(m*K)

    Thermal Expansion ..............................18.85 x 10-6e/°C

    Hardness Knoop ...................................158.3 kg/mm2 (100)
    Specific Heat Capacity .......................... 854J/(kg K)
    Dielectric Constant............................ 6.76 at 1MHz
    Young's Modulus (E)................................. 75.8 GPa
    Shear Modulus (G) ................................33.77 GPa

    Bulk Modulus (K) .....................................82.71 GPa
    Elastic Coefficients............. C11=164 MPa, C12=53 MPa, C44=33.7 MPa
    Apparent Elastic Limit ...................................36.54 MPa
    Poisson Ratio .......................................0.26

    CHEMICAL
    Solubility ........................................0.0017g/100g water at 20 °C
    Molecular Weight ..........................................................78.08
    Class/Structure ....................................... Cubic(111) cleavage

    REFRACTIVE INDEX
    ................1.51(0.19μm), 1.49(0.21μm), 1.47(0.25μm), 1.45(0.33μm), 1.44(0.41μm) 1.43(0.88μm), 1.42(2.65μm), 1.41(3.90μm), 1.40(5.00μm), 1.38(6.20μm), 1.36(7.00μm), 1.34(8.22μm)

    Material: ................................................................CaF2
    Dimension Tolerance: .....................................+/-0.1mm
    Thickness Tolerance: ......................................+/-0.2mm
    Surface Accuracy: .....................................................λ/4
    Surface Quality: ....................................................40-20
    Parallelism: ...............................................................<1'
    Clear Aperture: ....................................................>90%
    Bevelling: ........................................................0.2×45°
    Coating: .................................................Custom Design


    Note: Other sizes and specifications are available upon request.


       
       
     
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