Barium Fluoride Plano-Concave Lens PBa04-
Barium fluoride plano-concave lenses are composed of a plane and a concave sphere, which can produce negative spherical aberration, and are often used in systems to expand the beam or increase the focal length to balance the deviation of other lenses. It is used in telescope, microscope, sight, laser and optical fiber. In the ultraviolet, visible and infrared fields, barium fluoride plano-concave lenses have higher transmittance and lower scattering and reflection losses. In addition, barium fluoride flat concave lens also has high hardness and wear resistance, can withstand high temperature and pressure, so it also has a good application effect in extreme environments such as high temperature and high pressure.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Dia | 2-300 mm |
| Focal Length | 15-5000 mm |
| Center Thickness | 0.12-60 mm |
| Edge Thickness | Custom |
| Design Wavelength | Custom |
| Radius of Curvature | Custom |
| Surface Quality | 60-40 |
| Diameter Tolerance | +0.0/-0.1 |
| Thk Tolerance | ±0.1 mm |
| Substrate Material | Barium Fluoride（BaF2） |
| PV [@632.8nm] | λ/4 |
| Centering | <3′ |
| Clear Aperture | >90% |
| Coating | Uncoated |
| REACH | Compliant |
| ROHS | Compliant |
| Transmission Range [Substrate Material：Barium Fluoride（BaF2）] | 0.15-14μm |
| Transmittance [Substrate Material：Barium Fluoride（BaF2）；@0.35nm-10.8μm] | >94%@0.35nm-10.8μm |
| Refractive Index [Substrate Material：Barium Fluoride（BaF2）；@2.58μm] | 1.462@2.58μm |
| Refractive Index [Substrate Material：Barium Fluoride（BaF2）；@5μm] | 1.45@5μm |
| Reflection Loss [Substrate Material：Barium Fluoride（BaF2）；@2.58μm(both surfaces)] | 6.8%@2.58μm(both surfaces) |
| Reflection Loss [Substrate Material：Barium Fluoride（BaF2）；@5μm(both surfaces)] | 6.5%@5μm(both surfaces) |
| Reflection Loss [Substrate Material：Barium Fluoride（BaF2）；@10.35μm(both surfaces)] | 5.3%@10.35μm(both surfaces) |
| Absorption Coefficienet [Substrate Material：Barium Fluoride（BaF2）；@6μm] | 3.2×10⁻⁴@6μm |
| Structure [Substrate Material：Barium Fluoride（BaF2）] | Cubic Crystal System |
| Cleavage Planes [Substrate Material：Barium Fluoride（BaF2）] | <111> |
| Density [Substrate Material：Barium Fluoride（BaF2）] | 4.89 g/cm³ |
| Melting Point [Substrate Material：Barium Fluoride（BaF2）] | 1386 ℃ |
| Thermal Conductivity [Substrate Material：Barium Fluoride（BaF2）；@286K] | 11.72 @ 286K |
| Thermal Expansion [Substrate Material：Barium Fluoride（BaF2）；@273K] | 18.1 @ 273K |
| Knoop Hardness [Substrate Material：Barium Fluoride（BaF2）] | 82 kg/mm² |
| Specific Heat Capacity [Substrate Material：Barium Fluoride（BaF2）] | 410 J/(kg×K) |
| Dielectric Constant [Substrate Material：Barium Fluoride（BaF2）；@1 MHz] | 7.33 @ 1 MHz |
| Young's Modulus (E) [Substrate Material：Barium Fluoride（BaF2）] | 53.07 GPa |
| Shear Modulus(G) [Substrate Material：Barium Fluoride（BaF2）] | 25.4 GPa |
| Bulk Modulus(K) [Substrate Material：Barium Fluoride（BaF2）] | 56.4 GPa |
| Poisson Coefficient [Substrate Material：Barium Fluoride（BaF2）] | 0.343 |
| Solubility [Substrate Material：Barium Fluoride（BaF2）；@20℃] | 1.7g @ 20℃ |
| Molecular Weight [Substrate Material：Barium Fluoride（BaF2）] | 175.3238 g/mol |
Applications
Datasheet
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