Description of Lithium Fluoride Crystals Substrates
Lithium Fluoride Crystals (LiF) belong to the cubic system, and the cleavage plane is the (100) plane, which has excellent optical properties, especially in the deep ultraviolet range. With the development of deep ultraviolet technology in recent years, Lithium Fluoride Crystals are widely used for deep ultraviolet, due to their high transmittance in the deep ultraviolet region and short cutoff wavelengths.
Specification of Lithium Fluoride Crystals Substrates
The main performance parameters
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Crystal Structure
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Cubic
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Lattice Constants
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4.02 A
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Density
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2.65 (g/cm3)
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Melting Point
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884 °C
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Growth Method
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Bridgeman
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Mohs Hardness
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3 Mohs
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Coefficient of thermal expansion
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3.195 x 10-6/°C //c
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Refractive Index
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No=1.394; Ne=1.394
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Transmission Band
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0.11-6.5um
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Standard Orientation
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<100>, <110>, <111>
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Standard Size
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5x5mm, 10x10mm, Dia1"(25.4mm), Dia4"(100mm)
Or according to customer's requirements
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Standard Thickness
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0.5mm, 1.0mm, 2.0mm, 5.0mm
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LiF Crystal Application
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IR and UV windows, prism and substrate
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Polishing
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Single side polished or Double side polished
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Surface Quality
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Epi-polished (Roughness: Ra<5A (5 x 5um)) Optical polished (Surface finish: 60-40, 40-20 or others)
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Applications of Lithium Fluoride Crystals Substrates
With the development of deep ultraviolet technology in recent years, Lithium Fluoride Crystals Substrates are widely used for deep ultraviolet, due to their high transmittance in the deep ultraviolet region and short cutoff wavelengths.