ISP Optics Germanium (Ge) Windows
Original price was: $150.00.$99.99Current price is: $99.99.
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ISP Optics Germanium (Ge) Windows provide transmission and low absorption through the Long-Wave Infrared (LWIR) spectrum, making it useful for thermal imaging applications. Germanium features a Knoop Hardness of 780, making it ideal for infrared applications requiring rugged optics. These windows are available uncoated, Broadband Anti-Reflection (BBAR) coated for 8 – 12µm, or Diamond-Like Carbon (DLC) coated for 8 – 12µm. ISP Optics Germanium Windows are ideal for integration into thermal imaging systems, especially those that require rugged optics. Germanium is subject to thermal runaway, meaning that the transmission decreases as temperature increases. As such, these germanium windows should be used at temperatures below 100°C.
- Minimal Chromatic Aberration Due to Low Dispersion
- Uncoated Transmission from 2 – 16µm
- Available with BBAR or DLC Coating for 8 – 12µm
- 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.
| Bevel | Protective as needed |
|---|---|
| Clear Aperture (%) | 85 |
| Coefficient of Thermal Expansion CTE (10-6/°C) | 6.1 |
| Density (g/cm3) | 5.33 |
| Edges | Fine Ground |
| Index of Refraction nd | 4.002 @ 11µm |
| Knoop Hardness (kg/mm2) | 780 |
| Parallelism (arcmin) | <3 |
| Poisson's Ratio | 0.28 |
| Substrate | Germanium (Ge) |
| Surface Flatness (P-V) | λ/10 @ 10.6μm |
| Surface Quality | 40-20 |
| Wavelength Range (nm) | 2000 – 14000 |
| Young's Modulus (GPa) | 102.7 |
| Type of Window | Crystal |
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