new material
Calcium fluoride double-concave lens is a precision optical component designed for controlled beam expansion, reduced spherical aberration, and superior ultraviolet and infrared transmission. Manufactured from high-purity CaF₂, it offers outstanding optical clarity, minimal distortion, and excellent thermal stability. This lens is widely used in laser systems, spectroscopy, aerospace applications, and scientific instrumentation, ensuring optimal optical functionality for advanced imaging and beam-shaping applications.
Product Overview
The Calcium Fluoride (CaF₂) double-concave lens is an optical element designed specifically to increase the divergence of light beams. With a negative focal length, it causes parallel incident light to diverge outward. This lens is commonly used in applications such as beam expansion and projection. Calcium Fluoride is a high-purity material with excellent optical properties, enabling high transmission across ultraviolet, visible, and infrared wavelengths. Through precise machining and polishing, this lens provides accurate optical effects and is widely used in various optical systems.
Key Features
- High Purity and High Transmission: Calcium Fluoride, as an inorganic compound, offers extremely high optical transmission, making it suitable for ultraviolet, visible, and infrared wavelengths.
- Negative Focal Length Design: The double-concave shape effectively increases the divergence of light, making it ideal for beam expansion, projection, and other optical tasks.
- Low Scatter and Low Reflection: Provides low light scattering and reflection, ensuring high-quality optical transmission.
- Heat Resistance and Impact Resistance: CaF₂ has high hardness and thermal shock resistance, ensuring stable performance in extreme environments.
- Precision Machining: The lens is finely crafted through high-precision machining and polishing to ensure smooth surfaces and accurate shape.
Applications
- Optical Instrument Manufacturing: Widely used in optical instruments such as beam splitters, filters, and lenses to optimize overall optical performance.
- Laser Optical Systems: Used for beam expansion and collimation in laser systems, enhancing efficiency and stability.
- Aerospace Optical Systems: In aerospace systems, the Calcium Fluoride double-concave lens plays a critical role in beam regulation and optical system performance.
- Infrared Optical Systems: In infrared optical applications, especially in thermal imaging devices, the CaF₂ lens provides excellent transmission and enhances image quality.
- High-Energy Detectors: As a sensitive component, the CaF₂ lens can be used in high-energy detectors, improving detection accuracy and performance.
| 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 |
| Diameter Range | 2-300mm |
| Focal Length | 15-5000mm |
| Thickness | 0.12-60mm |
| Surface Quality | 80-50, 60-40, 40-20, 20-10, 10-5 |
| Surface Flatness | λ/2, λ/4, λ/8, λ/10 |
| Clear Aperture | >90% |
| Coating | Customizable |
