Product Introduction
Calcium fluoride (CaF₂) 2 ) Magnesium fluoride (MgF₂ 2 ) and barium fluoride (BaF) 2 ) Fluoride crystal materials boast high hardness and exceptional resistance to both mechanical and thermal shocks, while also exhibiting excellent transmittance across the UV, visible, and infrared spectral ranges. As a result, they are widely utilized in advanced technological fields such as lasers, infrared optics, ultraviolet optics, and high-energy detectors. Notably, these crystals deliver outstanding optical performance in the UV region—they are currently recognized as the best-known UV-cut-off optical crystals, offering high transmittance and minimal fluorescence emission, making them ideal materials for UV photodetectors, UV lasers, and UV-optical systems. Compared to calcium fluoride (CaF₂), 2 ) and barium fluoride (BaF) 2 ) The difference is magnesium fluoride (MgF 2 ) is a birefringent crystal.
Optical properties
| Through the wavelength range | Reflection Loss (2 Surfaces) | Thermal-optic coefficient dn/dT (1/°C) | Absorption coefficient (1/cm) | |
| Calcium fluoride (CaF₂) 2 ) | 130 nm – 10,000 nm | 5.4% at 5000 nm | -10.6 × 10 -6 | |
| Magnesium fluoride (MgF₂) 2) | 110 nm – 7500 nm | 11.2% @ 120nm 5.1% at 1000 nm |
2.3 × 10 -6 @ 400mnm | |
| Barium fluoride (BaF₂) 2 ) | 150 nm – 12,500 nm | -15.2 × 10⁻⁶ @400 nm -12.7 × 10⁻⁶ at 3390 nm (-60°C) -15.2 × 10⁻⁶ @3390 nm (+60°C) |
3.2 × 10⁻⁶ @6238 nm |
Refractive index properties: (CaF 2)
| Wavelength (nm) | Refractive index (n) | Wavelength (nm) | Refractive index (n) |
| 190 | 1.51 | 2650 | 1.42 |
| 210 | 1.49 | 3900 | 1.41 |
| 250 | 1.47 | 5000 | 1.40 |
| 330 | 1.45 | 6200 | 1.38 |
| 410 | 1.44 | 7000 | 1.36 |
| 880 | 1.43 | 8220 | 1.34 |
Refractive index properties: (MgF 2)
| Wavelength (nm) | Refractive index (n1) | Refractive index (n2) |
| 200 | 1.42 | 1.43 |
| 230 | 1.41 | 1.42 |
| 270 | 1.40 | 1.41 |
| 340 | 1.39 | 1.40 |
| 560 | 1.38 | 1.39 |
| 880 | 1.43 | 1.34 |
Refractive index as a function of wavelength: (20°C)
| Wavelength (nm) | Refractive index (n1) | Wavelength (nm) | Refractive index (n) |
| 260 | 1.51 | 5140 | 1.45 |
| 300 | 1.50 | 6500 | 1.44 |
| 360 | 1.49 | 8000 | 1.43 |
| 480 | 1.48 | 8600 | 1.42 |
| 850 | 1.47 | 9200 | 1.41 |
| 3240 | 1.46 | 9800 | 1.40 |
Fluoride single-crystal rod
It boasts high hardness, excellent resistance to both mechanical and thermal shocks, and exhibits superior transmittance across the UV, visible, and infrared spectral ranges. As a result, it is widely used in cutting-edge technological fields such as lasers, infrared optics, ultraviolet optics, and high-energy detectors.
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