Magnesium Fluoride Plano-Concave Lens PMg04-
Magnesium fluoride plano-concave lens is a birefringent crystal with good transmittance in ultraviolet, visible, and infrared, used in lasers, infrared optics, ultraviolet optics, and high-energy detectors. UM OPTICS can provide a diameter of 2-200mm and a thickness of 0.12-60mm (accuracy can reach 20-10, 1)/ 10L@633nm ）The magnesium fluoride plano concave 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 |
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Datasheet
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