Comparison of properties between infrared materials
Material name
Features
Calcium fluoride(CaF2)
Low absorption;high refractive index uniformity
Magnesium fluoride(MgF2)
Wide transmission range;high energy radiation resistance
Fused Silica(FS)
Low CTE and superior transmittance in IR
|
Material name |
Features |
|
Calcium fluoride(CaF2) |
Low absorption;high refractive index uniformity |
|
Magnesium fluoride(MgF2) |
Wide transmission range;high energy radiation resistance |
|
Fused Silica(FS) |
Low CTE and superior transmittance in IR |
|
Germanium (Ge) |
High refractive index;high Knoop hardness;excellent transmittance in medium to long wave infrared band |
|
Silicon (Si) |
Low cost;Light weight |
|
Zinc selenide (ZnSe) |
Low absorption; thermal shock resistance |
|
Zinc sulfide (ZnS) |
Superior transmittance in the visible and IR ranges, harder and more chemically resistant than ZnSe |
|
N-BK7 |
Low cost materials |
|
Sapphire |
High hardness;good transmittance in IR |
|
Potassium bromide (KBr) |
Resistance to mechanical shock: water soluble: wide transmission range |
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