Magnesium fluoride crystals from the vacuum ultraviolet 110 nm to infrared 7.5 u m range has very high transmission rate and low refractive index, make the crystal index loss is low. In 121.6 nm crystal has about 60% of the transmittance and do not produce color heart. Magnesium fluoride crystals is the only has wide spectrum transmission range and double refraction properties of crystal. The crystal is widely used in all kinds of optical components such as window, lens, lens, prisms, polariscope, wedge and substrate. l
Main performance indicators | |
Through the range（μm） | 0.11~7.5 |
The refractive index（0.7μm） | n0=1.37608 ne=1.38771 |
Reflection loss（0.6μm） | 5.2%（both faces） |
The thermal expansion coefficient（℃-1） | 13.7（Parallel to the axis C） 8.9（The vertical axis C） |
Thermal conductivity/300K（Wm-1K-1） | 0.3 |
Hardness （kg/mm2） | 415 |
Solubility（g/100gH2O·0℃） | 0.0002 |
Density （g/cm3） | 3.18 |
Melting point（℃） | 1255 |
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