Germanium (Ge) is in the range of 2-12 μm. Germanium is the most commonly used for making optical lenses and optical windows in high-efficiency infrared imaging systems. Due to the wide transmission range and opacity of visible light, Germanium is very suitable for infrared lasers and optical systems for the manufacture of optical components. Germanium's high refractive index and minimal surface curvature make it an ideal material for making low-power imaging systems.
Germanium (Ge) windows are widely used in a variety of scientific and industrial applications due to their excellent optical properties, particularly in the infrared (IR) region. Germanium has a high refractive index and a low absorption coefficient in the mid-IR range, making it an ideal material for use in IR spectroscopy and imaging applications. Germanium windows are also used in high-power laser systems and as protective windows for thermal imaging cameras.
Material | Germanium |
Diameter | 1 to 500 mm |
Diameter Tolerance | +0/-0.02 mm |
Thickness Tolerance | ±0.01 mm |
Surface Quality | 10-5 |
Surface Figure | λ/10 |
Parallelism | 1 Minute |
Coating | Uncoated, AR, HR, Beamsplitter, etc. |
Germanium windows have a high refractive index of about 4.0 and a low absorption coefficient in the mid-IR range, making them an ideal material for use in IR spectroscopy and imaging applications. They have a broad transmission range from 2-16 μm and are particularly useful in the 2-12 μm range.
Germanium windows are a relatively soft material with a Knoop hardness of about 780. They have a density of 5.33 g/cm3 and a thermal conductivity of about 59 W/mK, making them thermally conductive and resistant to thermal shock.
Germanium windows are commonly used in infrared spectroscopy and imaging applications due to their high transmittance in the mid-IR range. They are often used in Fourier transform infrared (FTIR) spectrometers, where they are used as beamsplitters or as windows for sample chambers.
Germanium windows are also used in high-power laser systems, where they are used as protective windows or lenses due to their high thermal conductivity and low absorption coefficient in the visible and near-IR range.
Germanium windows are used as protective windows in thermal imaging cameras, where they are used to protect the sensitive infrared detector from dust and other contaminants while allowing infrared radiation to pass through.
Germanium windows should be handled with care to avoid scratching or other damage to the surface. They can be cleaned using a mild detergent and water solution or with isopropyl alcohol. It is important to use a soft, lint-free cloth or a lens cleaning tissue to avoid scratching the surface.
What is the transmission range of Germanium windows? A: Germanium windows have a broad transmission range from 2-16 μm and are particularly useful in the 2-12 μm range.
Can Germanium windows be used in high-power laser systems? A: Yes, Germanium windows have a low absorption coefficient in the visible and near-IR range, making them an ideal choice for use in high-power laser systems.
What is the refractive index of Germanium? A: The refractive index of Germanium is about 4.0.
What is the thermal conductivity of Germanium? A: The thermal conductivity of Germanium is about 59 W/mK.
What is the typical thickness of Germanium windows? A: Germanium windows are available in thicknesses ranging from a few millimeters to several centimeters, depending on the application.
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