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Germanium circular window is a high-performance optical component designed for superior infrared transmission, exceptional thermal stability, and minimal optical distortion. Manufactured from high-purity germanium, it provides outstanding optical clarity, low chromatic aberration, and excellent mechanical durability, making it an essential material for infrared imaging, laser optics, aerospace applications, and precision scientific instruments. Its ability to function in harsh environments ensures reliable performance in advanced optical systems.
Product Overview
Germanium circular windows are high-quality optical components made from high-purity germanium material. These windows offer excellent optical performance, particularly for infrared optical systems. The properties of germanium provide high transparency in the infrared range, along with low reflection and absorption, making it an essential material in the infrared optical field. Additionally, germanium has excellent mechanical and thermal conductivity properties, making it an ideal choice for high-performance optical components.
Key Features
- High Transparency: Excellent optical transmission in the infrared wavelength range, suitable for infrared optical systems.
- Low Reflection & Low Absorption: Minimizes light scattering and ensures the stability of the optical system.
- Superior Thermal Stability: High thermal conductivity ensures stable performance in high-temperature environments.
- Chemical Stability: Germanium is chemically inert, insoluble in water, and resistant to corrosion from various chemicals, ensuring long-term durability.
- Mechanical Performance: High hardness and scratch resistance, capable of withstanding mechanical stress and friction, ideal for harsh environments.
Applications
- Infrared Optical Systems: Used as protective windows for infrared optical lenses or as core materials in infrared imaging systems, infrared spectrometers, etc.
- CO2 Laser Systems: With a very low absorption rate at the 10.6μm wavelength, germanium is an ideal material for CO2 laser systems.
- Electronic Sensor Protection: Serves as a protective window for electronic sensors or environmental detectors, isolating the internal and external environments and protecting precision components.
- Optical Component Manufacturing: Used to manufacture high-precision infrared lenses, infrared filters, and other infrared optical components, enhancing system performance.
- Photonic Crystals and Fiber Optic Communication: Used in photonic crystal and fiber optic communication fields to improve light transmission performance.
- Military, Aerospace, and Biomedicine: Widely used in the manufacture of optical components for military, aerospace, and biomedicine industries.
| Optical Properties | Value |
| Transmission Range | 2-15μm |
| Reflection Loss | 4.0028 @ 10.6μm |
| Absorption Coefficient | 1.3×10<sup>-3</sup>@3.8μm |
| 3×10<sup>-2</sup>@10.6μm | |
| Structure | Cubic Crystal System |
| Cleavage Planes | <111> |
| Physical Properties | Value |
| Density | 5.33 g/cm<sup>3</sup> |
| Melting Point | 936 ℃ |
| Thermal Conductivity | 58.61 W/(m×K) @ 293K |
| Thermal Expansion | 6.1 × 10<sup>-6</sup>/K @ 298K |
| Knoop Hardness | 780 kg/mm<sup>2</sup> |
| Specific Heat | 310 J/(kg×K) |
| Dielectric Constant | 16.6 @ 9.37 GHz |
| Young's Modulus | 102.7 GPa |
| Shear Modulus | 67 GPa |
| Bulk Modulus | 77.2 GPa |
| Poisson's Ratio | 0.28 |
| Chemical Properties | Value |
| Solubility | Insoluble |
| Molecular Weight | 72.61 g/mol |
| Parameter | Range |
| Diameter Range | 2-300 mm |
| Thickness | 0.12-60 mm |
| Surface Finish | 80-50, 60-40, 40-20, 20-10, 10-5 |
| Surface Accuracy | λ/2, λ/4, λ/8, λ/10 |
| Parallelism | <3' - 30" |
| Aperture Transmission | >90% |
| Coating | Customizable |
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