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Polycrystalline calcium fluoride (CaF₂) is a high-performance optical material recognized for its excellent ultraviolet and infrared transmission, strong environmental resistance, and superior thermal stability. Manufactured from high-purity CaF₂ with a polycrystalline structure, it provides enhanced mechanical strength and durability while maintaining precise optical characteristics. This material is widely used in laser systems, spectroscopy, semiconductor lithography, and scientific instrumentation, ensuring reliable optical performance for demanding applications.
Product Overview:
Polycrystalline Calcium Fluoride is an optical material with excellent light transmission properties. Its crystal structure, composed of calcium ions and fluoride ions, gives it a high transmission rate, low dispersion, and superior refractive index. In the visible light range, its transmission can exceed 90%, and it also demonstrates good transparency in ultraviolet and infrared regions. Due to its outstanding optical properties, polycrystalline CaF₂ is widely used in various optical components, particularly in fields requiring precise light refraction and focusing.
Key Features:
- High Transparency:Offers over 90% transmission in the visible spectrum, and good transmission in both ultraviolet and infrared regions.
- Low Dispersion:Exhibits low dispersion, effectively reducing chromatic aberration, which enhances imaging quality.
- Excellent Refractive Index:Provides efficient refraction and focusing of light, making it an ideal material for high-performance optical designs.
Applications:
- Optical Components:Widely used in the manufacturing of optical lenses, prisms, windows, and other optical elements.
- Ultraviolet, Visible, and Infrared Spectral Applications:Used in optical systems for light transmission and focusing in UV, visible, and infrared spectrums, suitable for various optical instruments.
- Optical Systems:Serves as an important material in high-precision optical systems, improving overall system performance and optical stability.
| Optical Property | Value |
| Transmission Range | 0.13-10 μm |
| Transmittance | >94%@193nm-7.87μm |
| Refractive Index | 1.4288@2.5μm, 1.39908@5μm |
| Reflection Loss | 5.4%@5μm (both surfaces) |
| Absorption Coefficient | 7.8×10⁻⁴@2.7μm |
| Structure | Cubic Crystal System |
| Cleavage Planes | <111 |
| Physical Property | Value |
| Density | 3.18 g/cm³ |
| Melting Point | 1420 ℃ |
| Thermal Conductivity | 9.71 W/(m·K) @ 293K |
| Thermal Expansion | 18.5×10⁻⁶/K @ 273K |
| Knoop Hardness | 158.3 kg/mm² |
| Specific Heat Capacity | 854 J/(kg·K) |
| Dielectric Constant | 6.76 @ 1 MHz |
| Young's Modulus | 75.8 GPa |
| Shear Modulus | 33.77 GPa |
| Bulk Modulus | 82.71 GPa |
| Poisson's Coefficient | 0.26 |
| Chemical Property | Value |
| Solubility | 0.016 g/L @ 20℃ |
| Molecular Weight | 78.0748 g/mol |
| Property | Value |
| Material Name | Poly-crystalline CaF₂ |
| Available Size | 3-420mm |
| Material Grade | VIR, UV |
| Transmittance Range | 0.13-10μm |
| Crystal Structure | Polycrystalline |
| Blank Shape | Round, rectangular, wedge, lens, step drilled, special-shaped |
| Blank Shape | Round, rectangular, wedge, lens, step drilled, special-shaped |
