The current paper describes the optical and mechanical design of a compact Three-Mirror Anastigmate (TMA) telescope which is installed at the ISS as an earth observation demonstrator for the thermal-infrared spectral range. The TMA bases on a Korsch type design. It has a focal length of 150 mm and an aperture of F/3 and allows for a diffraction limited performance at the design wavelength of 10 μm. The ground resolution reaches 80 m from the ISS. The mechanical design fits into a design space of 80x80x150 mm3 which would correspond to 1.5 U of a typical CubeSat for the telescope or 3U for the whole instrument, respectively.
Quantum well infrared photodetector (QWIP) technology is an established solution for tactical imaging in the longwave infrared (LWIR), thanks to its unmatched image uniformity, stability and pixel operability (typically >99.9 %). In this paper, we demonstrate that these qualities also make it a versatile platform for other advanced detection applications in this spectral range. First, the development of dual-band (10 and 10.8 µm) QWIP IDDCA as part of the technology demonstrator LisR [1] onboard the International Space Station (ISS) is followed up. Second, enhancement of the object detection in the field studies using polarimetric QWIP imager is presented. Finally, the manufacturability of QWIP focal plane arrays (FPAs) is illustrated by showing the performance statistics from the production of the large-area (16×12 mm2 ) and the small-pitch (15 μm) FPAs and uniformity of their characteristics over 4” detector wafers.
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