Athermal Infrared optics for Earth Observation

Coupled with a 1024 x 768 microbolometer sensor, the developed infrared optics covers a spectral range going from 8 to 14 µm. The key benefit is enhanced spatial resolution with a Ground Sampling Distance of 57 m for a flight altitude of 450 km. At this altitude, one single image covers a field of view (FOV) of 57 km (swath) x 43 km. Another advantage of the optical configuration is passive thermal compensation (no active focus). Typical thermal resolution is around 100 mK. The optics have been successfully qualified on the ground for vibration and thermal vacuum environments. This technology is relevant for different applications, such as Forest Fire monitoring, water stress management for agriculture or surveillance needs.