Ge optical window
- Uncoated or with AR Coatings Designed for a Variety of IR Ranges
- Minimal Chromatic Aberration Due to Low Dispersion
- Ideal for Infrared Applications Requiring Rugged Optics
DLC Coated Germanium Windows are also Available
Due to material supply chain disruptions with germanium, there may be increased lead times and price changes on our germanium products. For more information, please contact our customer service team.
Edmund Optics has limited remaining inventory of this part number and no raw material available to supply more once this is depleted. Please contact our Product Support Engineers to help with an alternate solution for your needs. Customer Service can provide you the latest price and availability.
Ge Optical Windows (Germanium Optical Windows) offer excellent infrared (IR) transmission from 2 to 14 µm, making them ideal for thermal imaging and IR applications. With high refractive index and low dispersion, they ensure superior optical performance. Germanium windows are durable, resistant to environmental factors, and widely used in defense, medical, and industrial systems. Custom sizes and coatings are available to meet specific requirements
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General Specification
| Bevel: | Protective as needed |
| Clear Aperture (%): | 90 |
| Edges: | Fine Ground |
| Knoop Hardness (kg/mm2): | 780 |
| Parallelism (arcmin): | <1 |
| Poisson’s Ratio: | 0.28 |
| Young’s Modulus (GPa): | 102.7 |
| Index of Refraction (nd): | 4.002 @ 11µm |
| Substrate: | Germanium (Ge) |
| Surface Flatness (P-V): | λ/10 @ 10.6μm |
| Surface Quality: | 60-40 |
| Coefficient of Thermal Expansion CTE (10-6/°C): | 6.1 |
| Density (g/cm3): | 5.33 |
