China Manufacturer AR Coating Germanium Wafer
- Maximum light transmission with AR coating
- Versatility Across Spectral Ranges
- Support customization
An AR Coating Germanium Wafer is a high-performance infrared optical component widely used in thermal imaging, infrared spectroscopy, and sensing applications.
Germanium (Ge) offers excellent transmission in the mid-infrared (2–14 μm).
Also, the anti-reflection (AR) coatings significantly enhance transmission efficiency and reduce surface reflection losses.
| Parameter | Specification |
|---|---|
| Clear Aperture (%) | 90.00 |
| Dimensional Tolerance (mm) | +0.0 / -0.1 |
| Coefficient of Thermal Expansion (10⁻⁶/°C) | 6.1 |
| Density (g/cm³) | 5.33 |
| Index of Refraction nd | 4.002 @ 11 μm |
| Knoop Hardness (kg/mm²) | 780.00 |
| Parallelism (arcmin) | < 1 |
| Poisson’s Ratio | 0.28 |
| Substrate | Germanium (Ge) |
| Surface Quality | 60-40 |
| Thickness Tolerance (mm) | ±0.1 |
Key features of the Germanium Wafer
- High transmittance across 2–14 μm wavelength range.
- ·The Germanium Wafer reduces reflection from ~36% (uncoated Ge) to less than 3% per surface.
- Germanium has a refractive index around 4.0, making AR coatings essential for optimal performance.
- Resistant to environmental conditions, with strong mechanical and chemical stability.
Why Choose Germanium Wafer?
Germanium wafers suffer from high surface reflections due to their high refractive index, limiting transmission.
Transmission efficiency can be greatly improved with AR coating, ensuring stable and precise performance in infrared optical systems.
Germanium has extremely high transmittance in the mid-to-long infrared wavelength range of 2 – 14 μm, and is almost opaque in the visible light region.
Chenyu uses high-quality germanium materials and offers customized services. If you have any needs, please feel free to contact us at any time.
Applications of Germanium Wafer
- Thermal Imaging Systems
- Spectroscopy
- Defense and Security
- Medical Devices
- Industrial Sensing
