Calcium Fluoride(CaF2) Plano-Concave Lenses
Calcium fluoride (CaF2) plano concave lens, with high hardness, strong resistance to mechanical shock and thermal shock, and good transmittance in UV, visible and infrared fields, are widely used in scientific and technological fields such as lasers, infrared optics, UV optics and high-energy detectors, especially they have good optical properties in the UV band. With high transmittance and low fluorescence radiation, calcium fluoride plano convex lens is an ideal material for UV photodetectors, UV lasers and UV optical systems.
Calcium fluoride (CaF2) plano concave lens is composed of a flat surface and a concave spherical surface, which can produce negative spherical aberration and is often used in systems where the light is expanded or the focal length is increased to balance the deviation of other lenses.
The applications of calcium fluoride plano-concave lenses include optical elements in optical systems, optical elements in laser systems, thermal imaging elements in infrared optics, and sensitive elements in high-energy detectors. It has high hardness, high resistance to mechanical and thermal shock, and good transmittance in the ultraviolet, visible and infrared fields. Precision machining and polishing are required during the manufacturing process to ensure its shape and finish. In addition, it can also be coated to improve its light transmission and anti-reflection properties.
Our company can provide Calcium fluoride (CaF2) plano concave lens with diameters from 2-300mm.and thicknesses from 0.12-60mm (accuracy up to 20-10, 1/10L@633nm),coating AR, BBAR, AF or upon request.
Technical parameters of CaF2 Plano-Concave Lens
Material properties of CaF2
Optical Properties | |
Transmission Range | 0.13-10μm |
Transmittance | >94%@193nm-7.87μm |
Refractive Index | 1.4288@2.5μm |
1.39908@5μm | |
Reflection Loss | 5.4%@5μm(both surfaces) |
Absorption Coefficienet | 7.8×10-4@2.7μm |
Structure | Cubic Crystal System |
Cleavage Planes | <111> |
Physical Properties | |
Density[g/cm3] | 3.18 |
Melting Point [℃] | 1420 |
ThermalConductivity [W/(m×K)] | 9.71 @ 293K |
Thermal Expansion [10-6/K] | 18.5 @ 273K |
Knoop Hardness [kg/mm2] | 158.3 |
Specific Heat Capacity [J/(kg×K)] | 854 |
Dielectric Constant | 6.76 @ 1 MHz |
Young's Modulus (E) [GPa] | 75.8 |
Shear Modulus(G) [GPa] | 33.77 |
Bulk modulus(K) [GPa] | 82.71 |
Poisson Coefficient | 0.26 |
Chemical Properties | |
Solubility / g/L | 0.016g @ 20℃ |
Molecular Weight / g/mol | 78.0748 |
Transmission curve
The transmission spectrum of calcium fluoride (CaF2) plano convex ranges from 130 nm to 10 μm. High hardness, strong resistance to mechanical and thermal shocks, and good transmittance of calcium fluoride (CaF2) plano convex in the UV, visible and IR fields are widely used in scientific and technological fields such as lasers, IR optics, UV optics and high-energy detectors, especially they have good optical properties in the UV band and are the known optical properties in the UV cut-off band. With high transmittance and low fluorescence radiation, calcium fluoride is an ideal material for UV photodetectors, UV lasers and UV optical systems.
Typical size of Calcium Fluoride(CaF2) Plano-Concave Lenses
Part No | Dia（mm) | FL (mm) | CT (mm) | ET (mm) | Wavelength (um) | Radius (mm) | Surface quality |
NOVACPCA-1 | 12.7 | F-18 | 2 | 5.3 | 0.588 | -7.8 | 40-20 |
NOVACPCA-2 | 12.7 | F-25 | 2.5 | 5.6 | 0.588 | -10.9 | 40-20 |
NOVACPCA-3 | 12.7 | F-75 | 2.4 | 3 | 2.94 | -31.4 | 40-20 |
NOVACPCA-4 | 12.7 | F-150 | 2.7 | 3 | 2.94 | -62.7 | 40-20 |
NOVACPCA-5 | 12.7 | F-200 | 1.8 | 2 | 2.94 | -83.6 | 40-20 |
NOVACPCB-1 | 25.4 | F-40 | 2 | 7.5 | 0.588 | -17.4 | 40-20 |
NOVACPCB-2 | 25.4 | F-75 | 2.5 | 5.1 | 0.588 | -32.5 | 40-20 |
NOVACPCB-3 | 25.4 | F-100 | 3 | 4.9 | 0.588 | -43.4 | 40-20 |
NOVACPCB-4 | 25.4 | F-200 | 3.5 | 4.4 | 0.588 | -86.8 | 40-20 |
NOVACPCB-5 | 25.4 | F-500 | 4 | 4.4 | 0.588 | -216.9 | 40-20 |
