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Home > Products > Optical Products > Optical Materials > CaF2 |
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CaF2
| Calcium Fluoride (CaF2) single crystal is an optical material with high transmittance in ultraviolet, visible and infrared regions of the spectrum: 0.15 ¦Ìm ~ 9 ¦Ìm range. Calcium Fluoride is widespread used for optical windows, lenses and prisms in the IR application; especially pure grades find useful application in the UV and as UV Eximer (High power applications) laser windows.
Useful: This material has found wide use in high power laser optics due to its low absorption; polished surfaces are stable and will last several years under normal conditions; due to its low refractive index, Calcium Fluoride can be used without anti-reflection coating. |
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| Main Properties |
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Crystal Properties |
| Crystal Growth Method |
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| Max. Size (mm) |
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| Optical Properties |
| Transmission range (¦Ìm) |
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| Reflection Loss, % for two surfaces at 5 ¦Ìm |
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| dN/dT |
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| Absorbance |
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see below |
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Wavelength (¦Ìm) |
Refractive Index (n) |
Wavelength (¦Ìm) |
Refractive Index (n) |
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0.1495 |
1.5800 |
4.0000 |
1.4069 |
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0.1612 |
1.5490 |
5.0000 |
1.3990 |
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0.2000 |
1.4951 |
6.0000 |
1.3856 |
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0.3000 |
1.4540 |
7.0000 |
1.3693 |
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0.4000 |
1.4419 |
8.0000 |
1.3498 |
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0.5000 |
1.4365 |
9.0000 |
1.3268 |
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1.0000 |
1.4289 |
10.0000 |
1.3002 |
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2.0000 |
1.4239 |
11.0000 |
1.2676 |
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3.0000 |
1.4179 |
12.0000 |
1.2299 |
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Transmission Curve
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Crystallographic Properties |
| Syngony |
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| Lattice Constant, Angstrom (Å) |
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| Cleavability |
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| Physical Properties |
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Density, at 291 K |
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Hardness, Mohs |
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Dielectric Constant for 105 Hz |
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Melting point, ¡ãC |
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Thermal Conductivity, W/m¡¤K at 36¡ãC |
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Thermal Expansion, 1/K |
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Specific Heat Capacity, J/(Kg¡¤¡ãC) at 40¡ãC |
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| Knoop Hardness, Kg/mm2 |
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Youngs Modulus, Gpa
<100>
<111> |
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Shear Modulus, Gpa
<100>
<111> |
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Bulk Modulus, GPa
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Debye Temperature, K
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Elastic Coefficients
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C11=164, C44=33.7, C12=53 |
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Poisson Ratio
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Chemical Formula
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Molecular Weight
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Solubility in water at 20 ¡ãC
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