Product Introduction
German (Ge) single crystals have a transmission spectrum ranging from 2 to 12 µm and are widely used as an infrared optical material due to their high hardness, excellent thermal conductivity, and insolubility in water. They are extensively employed in infrared imaging systems and infrared spectrometer setups. Germanium single crystals also exhibit superior mechanical properties and thermal performance, with minimal absorption at 10.6 µm—making them ideal for CO 2 The ideal material for laser lenses, windows, and output coupling mirrors—germanium (Ge) single crystals—is also used as the substrate material for a variety of infrared filters.
Optical properties
|
Through the wavelength range |
Thermal-optic coefficient, dn/dT (1/K) |
Absorption coefficient (1/cm) |
|
2000 nm – 12,000 nm |
4.08 × 10⁻⁴ @10,600 |
1. 1.3 × 10⁻³ @ 3800 nm |
Refractive index as a function of wavelength: (20°C)
|
Wavelength (nm) |
Refractive index (n) |
Wavelength (nm) |
Refractive index (n) |
|
2200 |
4.0879 |
8000 |
4.0057 |
|
3000 |
4.0451 |
9000 |
4.0040 |
|
3800 |
4.0267 |
10600 |
4.0028 |
|
5000 |
4.0160 |
1000 |
4.0025 |
|
6000 |
4.0107 |
12000 |
4.0021 |
|
7000 |
4.0079 |
13000 |
4.0018 |
Silicon-Coated Galvanometer Mirrors
German (Ge) single-crystal transmission spectra range from 2 to 12 µm, making it a widely used infrared optical material known for its high hardness, excellent thermal conductivity, and insolubility in water. It is extensively employed in infrared imaging systems and infrared spectrometer setups.
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