Magnesium Fluoride Biconcave Lens PMg06-
Magnesium fluoride biconcave lenses have a biconvex shape, consisting of two inward facing, identical curved surfaces and a negative focal length. The surface of the magnesium fluoride biconcave lens, which is used for reducing images or diverging light, undergoes precise processing and polishing to ensure its optical performance. It has high transmittance, high refractive index, and stability, and is used in lasers, spectrometers, telescopes, etc. UM OPTICS can provide a diameter of 2-200mm and a thickness of 0.12-60mm (accuracy can reach 20-10, 1)/ 10L@633nm ）Magnesium fluoride biconcave lens. 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 | 2-200 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 | Magnesium Fluoride（MgF2） |
| PV [@632.8nm] | λ/4 |
| Centering | 3 |
| Clear Aperture | >90% |
| Coating | Uncoated |
| REACH | Compliant |
| ROHS | Compliant |
| Transmission Range [Substrate Material：Magnesium Fluoride（MgF2）] | 0.12-9μm |
| Transmittance [Substrate Material：Magnesium Fluoride（MgF2）；@0.193-6μm] | >90%@0.193-6μm |
| Refractive Index [Substrate Material：Magnesium Fluoride（MgF2）；@0.13μm] | NO=1.566,Ne=1.568@0.13μm |
| Refractive Index [Substrate Material：Magnesium Fluoride（MgF2）；@5μm] | NO=1.334,Ne=1.343@5μm |
| Reflection Loss [Substrate Material：Magnesium Fluoride（MgF2）；@0.12nm(both surfaces)] | 11.2%@0.12nm(both surfaces) |
| Reflection Loss [Substrate Material：Magnesium Fluoride（MgF2）；@0.22μm(both surfaces)] | 5.7%@0.22μm(both surfaces) |
| Reflection Loss [Substrate Material：Magnesium Fluoride（MgF2）；@1μm(both surfaces)] | 5.1%@1μm(both surfaces) |
| Absorption Coefficienet [Substrate Material：Magnesium Fluoride（MgF2）；@2.7μm] | 40×10⁻³@2.7μm |
| Structure [Substrate Material：Magnesium Fluoride（MgF2）] | square crystal system |
| Cleavage Planes [Substrate Material：Magnesium Fluoride（MgF2）] | <100> |
| Density [Substrate Material：Magnesium Fluoride（MgF2）] | 3.177 g/cm³ |
| Melting Point [Substrate Material：Magnesium Fluoride（MgF2）] | 1255 ℃ |
| Thermal Conductivity [Substrate Material：Magnesium Fluoride（MgF2）；@300K] | 21 //c, 33.6⊥c @ 300K |
| Thermal Expansion [Substrate Material：Magnesium Fluoride（MgF2）；@373k] | 13.7//c, 8.9 ⊥c @ 373k |
| Knoop Hardness [Substrate Material：Magnesium Fluoride（MgF2）] | 415 kg/mm² |
| Specific Heat Capacity [Substrate Material：Magnesium Fluoride（MgF2）] | 1003 J/(kg×K) |
| Dielectric Constant [Substrate Material：Magnesium Fluoride（MgF2）；@1MHz] | 4.87 //c, 5.44⊥c @ 1MHz |
| Young's Modulus (E) [Substrate Material：Magnesium Fluoride（MgF2）] | 138.5 GPa |
| Shear Modulus(G) [Substrate Material：Magnesium Fluoride（MgF2）] | 54.66 GPa |
| Bulk Modulus(K) [Substrate Material：Magnesium Fluoride（MgF2）] | 101.32 GPa |
| Poisson Coefficient [Substrate Material：Magnesium Fluoride（MgF2）] | 0.276 |
| Solubility [Substrate Material：Magnesium Fluoride（MgF2）；@20℃] | 0.002g @ 20℃ |
| Molecular Weight [Substrate Material：Magnesium Fluoride（MgF2）] | 62.3018 g/mol |
Applications
Datasheet
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