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Reflecting Optics
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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
Magnesium Fluoride (MgF
2
)
Chemical Formula – MgF2
Refractive Index (@ 1.01 microns) – 1.38
Useful Wavelength Range
(Transmission) – 150nm to 8.0μm
Calcium Fluoride (CaF2)
Chemical Formula – CaF2
Refractive Index (@ 1.01 microns) – 1.43
Useful Wavelength Range
(Transmission) – 150nm to 8.0μm
UV-grade Fused Silica (SiO2)
Chemical Formula – SiO2
Refractive Index (@ 588nm) – 1.46
Useful Wavelength Range
(Transmission) – 175nm to 2.2μm
2.9μm to 3.6μm
IR-grade Fused Silica (SiO2)
Chemical Formula – SiO2
Refractive Index (@ 588nm) – 1.46
Useful Wavelength Range
(Transmission) – 200nm to 2.4μm
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