LiF

The transmittance of lithium fluoride crystal ranges from 110 nm in vacuum ultraviolet to 6.0 μm in infrared, and it is the material with the best transmittance in the vacuum ultraviolet region. This crystal is widely used to prepare optical windows, lenses, prisms and refractive elements in the ultraviolet-visible-infrared field. The low refractive index allows the crystal to be used directly without anti-reflection coating. Lithium fluoride crystals can also be used as X-ray detector crystals, as well as coating materials for OLED display screens. We can provide high-quality lithium fluoride single crystals grown by pulling and descending methods.

CasCrysTech (CCT) provides high quality lithium fluoride(LiF) crystal to the clients.

Uses/Applications

LiF is widely used to prepare optical windows, lenses, prisms and refractive elements in the ultraviolet-visible-infrared field.
It can be used directly without anti-reflection coating.
Lithium fluoride crystals can also be used as X-ray detector crystals, as well as coating materials for OLED display screens.

Features/Benefits

The transmittance of lithium fluoride crystal ranges from 110 nm in vacuum ultraviolet to 6.0 μm in infrared, and it is the material with the best transmittance in the vacuum ultraviolet region.
It has low refractive index.

  • Crystal Structure

    Cubic

    Lattice Constant

    a=4.026 Å  

    Melting Point

    870℃

    Density

    2.635 (g/cm3)

    Mohs Hardness

    4.0mohs

    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

    10×10mm20×20mm30×30mmØ50.8mm

    Thickness

    0.5mm1.0mm Can be customized

    Polishing

    One side or two sides

    Crystal Plane Orientation Accuracy

    ±0.5°

    Edge Orientation Accuracy

    Special requirements can reach within 1°

    Surface Roughness

    Ra≤10Å5×5µm

    Package

    Class 100 clean bag, Class 1000 super clean room


  • Dimension

    10×10mm,20×20mm,30×30mm,Ø50.8mm


    Thickness

    0.5mm,1.0mm (Can be customized)