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Transmission Curves
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(1) Magnesium Fluoride (MgF
2
) Calcium Fluoride (CaF2) UV-grade Fused Silica (SiO2) IR-grade Fused Silica (SiO2)
(2) BK7 (BK7) Crystal Quartz (SiO2) Germanium (Ge) Silicon (Si)
(3) Barium Fluoride (BaF2) Zinc Selenide (ZnSe) AMTIR (GeAsSe) Gallium Arsenide (GaAs)
(4) Zinc Sulfide (ZnS) Cleartran (ZnS) Sapphire (Al2O3) Spinel (MgAl2O4)
Optical Materials Selection Guide
Zinc Sulfide (ZnS)
Chemical Formula – ZnS
Refractive Index (@ 1.00 micron) – 2.27
Useful Wavelength Range
(Transmission) – 450nm to 14.0μm
Cleartran (ZnS)
Chemical Formula – ZnS
Refractive Index (@ 1.01 micron) – 2.29
Useful Wavelength Range
(Transmission) – 400nm to 12.0μm
Sapphire (Al2O3)
Chemical Formula – Al2O3
Refractive Index (@ 1.01 microns) – 1.76
Useful Wavelength Range
(Transmission) – 150nm to 5.0μm
Spinel (MgAl2O4)
Chemical Formula – MgAl2O4
Refractive Index (@ 1.01 microns) – 1.72
Useful Wavelength Range
(Transmission) – 400nm to 5.0μm
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