Applications of lithium fluoride lenses
Lithium fluoride lenses are used for windows, prisms and lenses in the vacuum ultraviolet, visible and infrared.

What are the advantages and disadvantages of LiF?
Advantages
Wide band transmission: good transmission from UV to IR.
Low absorption: low absorption and high transmittance in the UV and IR wavelengths.
Chemical stability: acid and alkali corrosion resistance, suitable for harsh environments.

Disadvantages
Low hardness: easy to scratch, need protective measures.
Poor thermal stability: high coefficient of thermal expansion, performance degradation at high temperature.
High cost: high material and processing costs.

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