Germanium Aspheric Lens PAsGe-
Germanium aspherical lens is an optical component with a transmission spectrum range of 2-12 μ m. It is a very commonly used infrared optical material with high hardness, good thermal conductivity, and insoluble in water. Commonly used include parabolic mirror, hyperbolic mirror, ellipsoidal mirror, etc. In optical systems, it can effectively correct various aberrations, improve imaging quality, and enhance system discrimination ability. It can replace multiple spherical parts with one or several non spherical parts, thereby simplifying instrument structure, reducing costs, and effectively reducing instrument weight. 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 | Germanium（Ge） |
| PV [@632.8nm] | λ/4 |
| Centering | <3′ |
| Clear Aperture | >90% |
| Coating | Uncoated |
| REACH | Compliant |
| ROHS | Compliant |
| Transmission Range [Substrate Material：Germanium（Ge）] | 2-15μm |
| Reflection Loss [Substrate Material：Germanium（Ge）；@10.6μm] | 4.0028@10.6μm |
| Absorption Coefficienet [Substrate Material：Germanium（Ge）；@3.8μm] | 1.3×10⁻³@3.8μm |
| Absorption Coefficienet [Substrate Material：Germanium（Ge）；@10.6μm] | 3×10⁻²@10.6μm |
| Structure [Substrate Material：Germanium（Ge）] | Cubic Crystal System |
| Cleavage Planes [Substrate Material：Germanium（Ge）] | <111> |
| Density [Substrate Material：Germanium（Ge）] | 5.33 g/cm³ |
| Melting Point [Substrate Material：Germanium（Ge）] | 936 ℃ |
| Thermal Conductivity [Substrate Material：Germanium（Ge）；@293K] | 58.61 @ 293K |
| Thermal Expansion [Substrate Material：Germanium（Ge）；@298K] | 6.1 @ 298K |
| Knoop Hardness [Substrate Material：Germanium（Ge）] | 780 kg/mm² |
| Specific Heat Capacity [Substrate Material：Germanium（Ge）] | 310 J/(kg×K) |
| Dielectric Constant [Substrate Material：Germanium（Ge）；@9.37 GHz] | 16.6 @9.37 GHz |
| Young's Modulus (E) [Substrate Material：Germanium（Ge）] | 102.7 GPa |
| Shear Modulus(G) [Substrate Material：Germanium（Ge）] | 67 GPa |
| Bulk Modulus(K) [Substrate Material：Germanium（Ge）] | 77.2 GPa |
| Poisson Coefficient [Substrate Material：Germanium（Ge）] | 0.28 |
| Solubility [Substrate Material：Germanium（Ge）] | Inoluble |
| Molecular Weight [Substrate Material：Germanium（Ge）] | 72.61 g/mol |
Applications
Datasheet
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