Barium Fluoride Biconcave Lens PBa06-
Barium fluoride biconcave lenses have concave surfaces on both sides and are commonly used for applications such as beam expansion, projection, and beam alignment. Using barium fluoride as the substrate material, it has high hardness, resistance to mechanical and thermal shock, and good transmittance in the ultraviolet, visible, and infrared fields. Used in lenses, beam splitters, filters, prisms, and window panels in low-temperature refrigeration imaging systems, aerospace optical systems, and laser optical systems. Can be coated with MgF2, UV-AR, UV-VIS, VIS-EXT, VIS-NIR, NIR I, NIR II, Telecom NIR, SWIR, SWIR, YAG-BBAR and other film systems.
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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 | 0.12-60 mm |
| 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′ |
| Coating | Uncoated |
| Clear Aperture | >90% |
| 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；@5μm] | 1.462@2.58μm1.45@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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