Germanium Meniscus Lens PGe07C002
The germanium meniscus lens has an outer convex mirror and an inner concave mirror, which can change the direction and focus of the beam of light. Features: high transparency, high anti reflection, high thermal stability, etc. It can have high transmittance in both visible and infrared bands, with low reflectivity and low absorption. Used as a transmission or reflection device for optical paths in equipment such as LiDAR, optical sensors, and spectrometers. UM OPTICS can provide straight 2-300mm, thickness 0.12-60mm (accuracy can reach 20-10,1)/ 10L@633nm ）The germanium crescent lens has four major processes: rubber disc polishing, high-speed polishing, circular polishing, and CNC polishing. It has ZYGO, AFM, reflection and transmission eccentricity, 15 second angle measuring instrument, UV bonding centering system, non-contact laser thickness measuring instrument, 2D imaging instrument, and spherical diameter measuring instrument to ensure the accuracy of data. It 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 | 12.7 mm |
| Focal Length | F25 |
| Center Thickness | 2 mm |
| Edge Thickness | 1.8 mm |
| Design Wavelength | 10.6 μm |
| Radius of Curvature | R1(-40.27) R2(27.13) |
| Surface Quality | 60-40 |
| Diameter Tolerance | +0.0/-0.1 |
| Thk Tolerance | ±0.1 mm |
| Substrate Material | Germanium（Ge） |
| Irregularity [@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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