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Transmission vs wavelength
100
95
90
85
80
50
25
0
150 200 300 400 500 600 700 800 900 1000 2000 2500 6000 10000
0.15um 1um 10um
Refractive index Melting (Strain)point (cercius degree) Density(g/cm3)
VUV Calcium fluoride(CaF2) 1.43 1418 3.18
Sapphire(Al2O3) 1.78 2050 3.98
uv Fused silica(SiO2) 1.46 (970) 2.20
Low-expansion glass 1.47 (510) 2.20
Germanium(Ge) 4.00 937 5.33
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Please note that the above specs are typical values and not guaranteed ones.