Germanium Biconcave Lens PGe06-
The transmission spectrum range of germanium biconcave lens is 2-12 μ m, which is an infrared optical material with good thermal conductivity and insoluble in water. Used for infrared imaging systems and infrared spectrometer systems. Double concave lenses are similar to flat concave lenses, with a negative focal length, but parallel incident light diverges outward. The curvature radii of the two sides of a double concave lens are equal, and it is generally used for beam expansion and projection. UM OPTICS can provide a diameter of 2-300mm and a thickness of 0.12-60mm (accuracy can reach 20-10,1)/ 10L@633nm ）A germanium biconcave lens.
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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 |
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Datasheet
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