DYNAMIC MTF, AN INNOVATIVE TEST BENCH FOR DETECTOR CHARACTERIZATION

摘要

PLEIADES HR are High Resolution satellites for Earth observation. Placed at 695 km they reach a 0.7 m spatial resolution. To allow such performances, the detectors are working in a TDI mode (Time and Delay Integration) which consists in a continuous charge transfer from one line to the consecutive one while the image is passing on the detector. The spatial resolution, one of the most important parameter to test, is characterized by the MTF (Modulation Transfer Function). Usually, detectors are tested in a staring mode. For a higher level of performances assessment, a dedicated bench has been set-up, allowing detectors' MTF characterization in the TDI mode. Accuracy and reproducibility are impressive, opening the door to new perspectives in term of HR imaging systems testing.