Lithium Fluoride Biconvex Lens PLi05-
Lithium fluoride double convex lenses are used to focus light from point sources or transmit images to other optical systems. The longer the focal length, the larger the lens diameter will be. Lithium fluoride has a wide transmission band (110 ~ 6,600nm) and high transmittance, but also has excellent infrared characteristics, in the infrared band, especially in the far infrared to the long wave infrared band (such as 3 ~ 5μm and 8 ~ 14μm), lithium fluoride has a high transmittance, used as infrared laser, infrared night vision window material. In order to improve transmittance and anti-reflection properties, it is usually necessary to carry out coating treatment. It can plate 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 | 2-100 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 | Lithium Fluoride（LiF） |
| PV [@632.8nm] | λ/4 |
| Centering | <3′ |
| Clear Aperture | >90% |
| Coating | Uncoated |
| REACH | Compliant |
| ROHS | Compliant |
| Transmission Range [Substrate Material：Lithium Fluoride（LiF）] | 0.11-7μm |
| Transmittance [Substrate Material：Lithium Fluoride（LiF）；@0.6μm] | >94.8%@0.6μm |
| Reflection Loss [Substrate Material：Lithium Fluoride（LiF）；@0.6μm(both surfaces)] | 5.2%@0.6μm(both surfaces) |
| Absorption Coefficienet [Substrate Material：Lithium Fluoride（LiF）；@4.3μm] | 5.9×10⁻³@4.3μm |
| Structure [Substrate Material：Lithium Fluoride（LiF）] | Cubic Crystal System |
| Cleavage Planes [Substrate Material：Lithium Fluoride（LiF）] | <100> |
| Density [Substrate Material：Lithium Fluoride（LiF）] | 2.639 g/cm³ |
| Melting Point [Substrate Material：Lithium Fluoride（LiF）] | 848 ℃ |
| Thermal Conductivity [Substrate Material：Lithium Fluoride（LiF）；@314K] | 11.3 @ 314K |
| Thermal Expansion [Substrate Material：Lithium Fluoride（LiF）；@283K] | 37.0 @ 283K |
| Knoop Hardness [Substrate Material：Lithium Fluoride（LiF）] | 415 kg/mm² |
| Specific Heat Capacity [Substrate Material：Lithium Fluoride（LiF）] | 1562 J/(kg×K) |
| Dielectric Constant [Substrate Material：Lithium Fluoride（LiF）；@1 MHz] | 7.33 @ 1 MHz |
| Young's Modulus (E) [Substrate Material：Lithium Fluoride（LiF）] | 64.79 GPa |
| Shear Modulus(G) [Substrate Material：Lithium Fluoride（LiF）] | 55.14 GPa |
| Bulk Modulus(K) [Substrate Material：Lithium Fluoride（LiF）] | 62.03 GPa |
| Poisson Coefficient [Substrate Material：Lithium Fluoride（LiF）] | 0.22 |
| Solubility [Substrate Material：Lithium Fluoride（LiF）；@20℃] | 2.7g @ 20℃ |
| Molecular Weight [Substrate Material：Lithium Fluoride（LiF）] | 25.9394 g/mol |
Applications
Datasheet
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