Design and performance of curved prism-based mid-wave infrared hyperspectral imager

Mid-wave infrared hyperspectral imagers (MWHSIs) can be used to detect flames, high-temperature targets, and the radiance of Earth's surface. The acquired spectral signatures can be utilized to distinguish them even though the radiance are the same. In addition, in these applications, it is necessary to acquire the signatures of targets with sufficient radiometric performance and the spatial information of the targets with high resolution simultaneously. To meet these requirements, high resolution, high optical efficiencies, and appropriate spectral intervals must be balanced. Curved prisms with a modified Offner structure can address this problem perfectly and is employed in this study as the spectrometer of the MWHSI. It also enables integrated systems to have a low spectral smile, volume, and mass. Different flames and heated materials could be discriminated using their spectral features. These features of MWHSI make it valuable in airborne and spaceborne remote sensing applications. The image of flying plane is acquired and it satisfied the scientific goal.