Custom Germanium Optical Windows for IR Applications
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Germanium windows up to 295 mm diameter;
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Germanium planoconvex and meniscus lenses with any focal length;
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Germanium Optics with DLC/AR coating for 8-12µm, BBAR coating for 3-5µm, 2-14µm or 8-12µm;
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Infrared interference filters on Ge substrate.
Custom Germanium Optical Windows for IR Applications
Germanium optical windows are ideal for infrared (IR) applications, offering excellent transmission in the mid-wave infrared (MWIR) and long-wave infrared (LWIR) regions. Custom-made to precise specifications, these windows provide superior performance in thermal imaging, spectroscopy, and laser systems. With high durability and resistance to thermal shock, Germanium windows are perfect for use in harsh environments. Available in a range of sizes and coatings, these windows ensure optimal clarity and minimal distortion for critical IR optics.
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 |
