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  • Calcium Fluoride Prism - China

    price: check with company for price

    CaF2 crystal is high in hardness and strong in resistance to mechanical shock and thermal shock, which has excellent transmittance at ultraviolet, visible and infrared wavelength band. It is widely used in such technical domains as laser, infrared optics, ultraviolent optics, high energy detector, etc. It is a known optical crystal at ultraviolet ending wavelength band, whose optical performance is especially good at ultraviolent wavelength band. With high transmittance and little fluorescent radiation, it is the ideal material for UV-light detectors, ultraviolent lasers and ultraviolet optical system. Unlike CaF2, MgF2 is a kind of birefringent crystal.
    Physical property:
    Density (g . cm-3 ) (CaF2) (Mgf2)
    Density (g . cm-3 ) 3.18 3.177
    Dielectric constant 6.76 @1HMZ 4.87(parallel to axis C), 5.44(vertical to axis C )
    Melting point (℃) 1360 1255
    Chemical purity (%) 99.9996 99.9996
    Coefficient of thermal expansion (1/℃) 18.85* 10-6 13.7* 10-6(parallel) 驶8.48* 10-6(vertical)
    7.3* 10-6@373k 7.0* 10-6@373k
    Thermal conductivity (J/k .m. s) 9.71 0.3 @ 27℃
    Thermal capacity (J/g .k) 0.854 1.003 @ 298k
    Knoop hardness (kg/mm2) 158.3 415
    Young modulus (Gpa) 75.8 138.5
    Shear modulus (GPa) 33.77 15.66
    Poisson’s ratio 0.26 0.276
    Bulk modulus (Gpa) 82.71 101.32
    Optical property:
    (CaF2) (MgF2)
    Transmitted wavelength range 130nm---10000nm 110nm—7500nm
    Reflection loss(two sides) 5.4% @ 5000nm 11.2% @ 120nm
    5.1% @ 1000nm
    Thermo-optical coefficient dn/dT(1/℃) -10.6*10-6 2.3*10-6 @ 400mnm
    Refractive index property:
    (CaF2)
    Wavelength (nm) Refractive index (n) Wavelength Refractive index
    190 1.51 2650 1.42
    210 1.49 3900 1.41
    250 1.47 5000 1.40
    330 1.45 6200 1.38
    410 1.44 7000 1.36
    880 1.43 8220 1.34
    (MgF2)
    Wavelength (nm) Refractive index (n) Wavelength
    200 1.42 1.43
    230 1.41 1.42
    270 1.40 1.41
    340 1.39 1.40
    560 1.38 1.39
    Technical requirement Tolerance range
    Size range 1-400mm
    Size tolerance +0/-0.05mm
    Angle tolerance ±2”-±5’´
    Surface quality 40/20
    Surface accuracy λ/10 per @633nm
    Beveling 0.1-0.5mm
    Material CaF2
    Coating film 8-14micrometers or 3-5 micrometers etc. band


    Company Contact:


    • Phone: 15860296796

    • Address: 4/F, 12th Bldg, Taijiang Industrial Park, Juyuanzhou Industrial Zone,Fuzhou, Fujian, China, Fuzhou, Fujian, China

    • Email: Email


    Published date: August 11, 2016 -

    • Business Description: Our manufacturing capabilities consist of all types of customized lens, Beam Splitters, Polarizing Optics, Prisms, Filters, Coatings, Optical Systems, Optical Assemblies and Optical Systems Solutions, Laser Crystals, NLO Crystals. The products are widely used in laser industry, optical communication, laser display, medical equipment, survey equipment, precision Instrument and semiconductor.

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