Magnesium Fluoride (MgF2)
The usage of magnesium fluoride (MgF2) in optics allows to achieve principally new devices, due to the wide transmission range of MgF2 (especially in vacuum UV-range), that combines with mechanical and thermal hardness, chemical and radiation resistance, natural birefringence, and also with favorable thermalphysiñ characteristics.
Substance characteristics |
Crystal system |
tetragonal |
Density, g/cm 3 |
3.176 |
Microhardness, Pa |
576 * 107 (at the Knoope) |
Thermal conductivity, Wt/(m·°Ñ) |
3 |
Linear expansion coefficient, α õ 107, °Ñ-1 |
145.4 & (ll) C
92.5 (^ )C |
Modulus of elasticity E õ 10-7, Pa, along the lines III |
16 910 (ll) C |
Refractive index, nD |
1.377 |
Transmission band, um |
0.,13÷7.0 |
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Refractive index |
λ, um |
ne |
no |
0.2 |
1.4367 |
1.4231 |
0.5 |
1.3916 |
1.3797 |
1.0 |
1.3852 |
1.3736 |
2.0 |
1.3797 |
1.3686 |
3.0 |
1.3724 |
1.3618 |
4.0 |
1.3622 |
1.3525 |
5.0 |
1.3487 |
1.3400 |
6.0 |
1.3315 |
1.3242 |
7.0 |
1.3101 |
1.3044 |
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“Elan Ltd.” makes waveplates, achromatic waveplates and polarizing prisms made of MgF2.
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