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Lithium fluoride (LiF)

The transmissivity of Lithium fluoride crystal ranges from vacuum ultraviolet 110nm to infrared 6.0 μ M is the material with the best transmittance in the vacuum ultraviolet region. This crystal is widely used for preparing optical windows, lenses, prisms, and refractive elements in the ultraviolet visible infrared field. Low refractive index allows for direct use of crystals without the need for anti reflective coatings. Lithium fluoride crystal can also be used as X-ray detector crystal and coating material of OLED display screen. We can provide high-quality Lithium fluoride single crystals grown by pull and drop methods

Dihedral Technology(DHD) Co., Ltd. manufacture and processing/provide multiple specifications and high quality LiF crystal,targets,materials.

Applications

LiF is widely used in the preparation of optical windows, lenses, prisms, and refractive elements in the ultraviolet visible infrared field.
Can be used directly without the need for anti reflective coating.
Lithium fluoride crystals can also be used as X-ray detector crystals and as coating materials for OLED displays.

Features

The transmissivity of Lithium fluoride crystal ranges from 110nm in vacuum ultraviolet to 6.0 in infrared μ M is the material with the best transmittance in the vacuum ultraviolet region.
Its refractive index is very low.

  • Crystal Structure

    Cubic

    Lattice Constant

    a=4.026 Å  

    Melting Point

    870℃

    Density

    2.635 (g/cm3)

    Mohs Hardness

    4.0（mohs）

    Thermal Expansion

    37.0 x 10-6 /K

    Refractive Index

    n=1.39

    Transmission Wavelength

    0.11-7.00 μm

    Transmittance

    > 90% @0.2~4.5 μm; 

    Color Deviation Hf-Hc

    0.00395

    Temperature Coefficient (dh/dt x10-6)

    12.7 @0.6 m

    Growth Method

    Bridgeman, Czochralski

    Cleavage Plane

    <100>

    Dimension

    10×10mm，20×20mm，30×30mm，Ø50.8mm

    Thickness

    0.5mm，1.0mm （Can be customized）

    Polishing

    One side or two sides

    Crystal Plane Orientation Accuracy

    ±0.5°

    Edge Orientation Accuracy

    2°（Special requirements can reach within 1°）

    Surface Roughness

    Ra≤10Å（5×5µm）

    Package

    Class 100 clean bag, Class 1000 super clean room



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