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.
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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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Dimension
10×10mm,20×20mm,30×30mm,Ø50.8mm
Thickness
0.5mm,1.0mm (Can be customized)