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Alkor Technologies manufactures custom Calcium Fluoride optical components for Ultraviolet and Infrared spectrum: CaF2 windows, CaF2 lenses and wedges according your specifications.
Please visit our CaF2 windows catalog and CaF2 lenses catalog and check one of the best prices on the market!
We produce the following custom CaF2 optics:
Please send us your specifications, we will quote it within 24hrs.
We have own growth facility for CaF2 crystal growth. We grow about 50kg of CaF2 crystals every month. That is why we can offer high quality Calcium Fluoride (CaF2) windows and lenses at very competitive price. Compare our prices now!
Simple guide to CaF2 grade: Excimer, VUV, UV, IR. Click here.
CaF2 transmission curve. Sample thickness 10mm.
Calcium Fluoride is used for optical windows, drilled discs, lenses and prisms in transmision range 0.15-9µm. Degradation due to to moisture in the atmosphere is minimal, and polished surfaces of the CaF2 windows may be expected to withstand several years exposure to normal atmospheric conditions.
Since they are nonaxial, CaF2 crystals do not require consideration of axial direction. Because of CaF2 low refractive index, Calcium Fluoride windows can be used without an anti-reflection coating.
Calcium Fluoride is attacked by atmospheric moisture at 600°C, where it begins to soften. The top use temperature is 800C, when moisture is not present. Irradiation of Calcium Fluoride windows causes some loss in UV transmission. CaF2 is sensitive to thermal shock.
Typical applications: VUV - UV - IR imaging systems, excimer laser windows, CaF2 viewport, demountable cell windows in spectroscopy and all kinds of lenses. Alkor produces CaF2 windows and mirrors for European manufacturers of gas detectors and gas analyzers.
Maximum diameter of CaF2 windows by Alkor - 220mm (8"). Alkor manufactures vacuum UV grade CaF2 windows and lenses (193nm and 157nm) upon request.
Download CaF2 datasheet in PDF.
| Chemical Formula |
CaF2 |
| Crystal Class |
Cubic, cleaves [111] plane |
| Lattice Constant, Å |
5.46 |
| Density, g/cm3 (20 °C) |
3.18 |
| Molecular Weight |
78.08 |
| Dielectric Constant for 105 Hz |
6.76 |
| Melting Temperature, K |
1630 |
| Thermal Conductivity, W/(m K) at 273 K |
10 |
| Thermal Expansion, 1/K at 300 K |
18.9 x 10-6 |
| Specific Heat, cal/(g K) at 273 K |
0.204 |
| Debye Temperature, K |
510 |
| Young's Modulus, GPa |
75.79 |
| Rupture Modulus, GPa |
0.0365 |
| Shear Modulus, GPa |
33.76 |
| Bulk Modulus, GPa |
83.03 |
| Poisson's Ratio |
0.28 |
| Knoop Hardness, kg/mm2 |
178 [100], 160 [110] |
| µm |
No |
µm |
No |
µm |
No |
| 0.149 |
1.5800 |
0.161 |
1.5490 |
0.195 |
1.5000 |
| 0.200 |
1.4950 |
0.222 |
1.4800 |
0.248 |
1.4680 |
| 0.266 |
1.4621 |
0.280 |
1.4584 |
0.300 |
1.454 |
| 0.337 |
1.4481 |
0.400 |
1.4419 |
0.486 |
1.4370 |
| 0.588 |
1.4339 |
0.656 |
1.4325 |
0.687 |
1.4320 |
| 0.728 |
1.4314 |
0.884 |
1.4298 |
1.014 |
1.4288 |
| 1.100 |
1.4283 |
1.250 |
1.4275 |
1.650 |
1.4256 |
| 1.900 |
1.4244 |
2.058 |
1.4236 |
2.450 |
1.4214 |
| 2.700 |
1.4199 |
2.800 |
1.4192 |
3.050 |
1.4175 |
| 3.400 |
1.4149 |
4.000 |
1.4096 |
4.400 |
1.4057 |
| 4.800 |
1.4014 |
5.000 |
1.3991 |
5.304 |
1.3952 |
| 5.893 |
1.3871 |
6.483 |
1.3782 |
7.072 |
1.3681 |
| 7.661 |
1.357 |
8.251 |
1.3444 |
8.840 |
1.3308 |
| 9.429 |
1.3161 |
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