Germanium (GE) Window

You can expect superior performance, reliability and longevity germanium windows from one of the germanium window suppliers, TC OPtics, at an unbeatable price point. Germanium (Ge) window is in the range of 2-12 μm, commonly used for making optical lenses and optical windows in high-efficiency infrared imaging systems. Due to the wide germanium window transmission range and opacity of visible light, Germanium IR window is very suitable for infrared lasers and optical systems for the manufacture of optical components. Germanium optical window's high refractive index and minimal surface curvature make it an ideal material for making low-power imaging systems.

GE Window Specification

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.

Germanium IR window is a type of infrared window made from Germanium material. It is transparent to long-wave infrared radiation and has a high refractive index, making it ideal for use in infrared optics. Germanium IR window can transmit light in the wavelength range of 2-16 µm, which is in the far-infrared to mid-infrared region. This transparency property makes it ideal for use in infrared imaging systems, as well as in spectroscopy and remote sensing devices. Germanium IR window can be used in harsh environments, as it is highly resistant to thermal or mechanical shock due to its high thermal conductivity.  Overall, Germanium IR window is a versatile material with excellent optical, thermal and mechanical properties, making it an ideal choice for a wide range of infrared applications.

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Germanium IR Windows Properties and Characteristics

Optical Properties (germanium window transmission)

Germanium IR 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 have high transmittance in the infrared region, particularly in the 2-16 µm wavelength range. Their transmission rate reaches up to 70% at 2 µm, 50% at 4 µm, 27% at 8 µm and 14% at 12 µm. Germanium windows are commonly used in thermal imaging applications, as well as in infrared spectroscopy and remote sensing systems. They are well-suited for use in applications that require high thermal resistance and high refractive index in the infrared region.

Physical Properties

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 Optical Windows Applications

Infrared Spectroscopy and Imaging

Germanium optical IR 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.

High-Power Laser Systems

Germanium optical 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.

Thermal Imaging Cameras

Germanium optical 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 (GE) Windows Handling and Maintenance

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.

GE windows FAQs

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 ir window?

A: The thermal conductivity of Germanium IR windows is about 59 W/mK.

What is the typical thickness of Germanium optical windows?

A: Germanium optical windows are available in thicknesses ranging from a few millimeters to several centimeters, depending on the application.

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