Optical Properties:

• High light transmittance: Germanium has excellent light transmittance in the infrared band (about 2 μm to 18 μm), making it ideal for infrared imaging and spectroscopic analysis.
• Refractive index: Germanium has a refractive index of about 4.0 (at a wavelength of 10 μm) and is able to effectively focus and transmit infrared light.

Mechanical Properties:

• Hardness: Germanium is relatively hard and has good wear resistance.
• Toughness: Germanium exhibits good toughness in a certain temperature range and is able to withstand certain impacts.

• Thermal stability: It can still maintain stability under high temperature conditions, and is suitable for applications in high temperature environments.
• Chemical stability: Good resistance to a wide range of chemicals, but caution is still required in strong acids and bases.

Technical Parameters

• Infrared imaging: widely used in windows and lenses in infrared imaging systems (e.g., thermal imaging cameras, night vision devices).
• Spectral analysis: Used as an optical window in infrared spectrometers to help analyze the composition of substances.
• Laser technology: as a window material for lasers, especially in the mid-infrared and far-infrared wavelength ranges.
• Infrared sensors: Used in a variety of infrared sensors and detectors to help detect and measure infrared radiation, widely used in security and surveillance systems.
• Optical communication: In optical communication systems, germanium windows can be used for signal transmission in the infrared band to improve communication efficiency.
• Scientific applications: In the laboratory and in research, as an optical component for various experiments and optical measurements.
• Semiconductor devices: In some electronic devices, germanium acts as a window to the semiconductor material and participates in the regulation and transmission of light.

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