Image collection device for imaging or spectrometry includes calibrating initial sensor producing stimulus signal to trigger subsequent sensor amplifiers

摘要

The scanner includes an acquisition channel (V). This comprises several sensors (1), each associated with a pre-amplifier (2) and receiving a common fraction of the photon flux from the scene. A calibrating device (8) with a sensor (9) upstream of the main sensors provides a stimulus signal to the pre-amplifiers. The scanner-type device for detecting a photon flux emitted by a scene includes at least one acquisition channel (V). This comprises several sensors (1) aligned with the scanner, each associated with a pre-amplifier (2) and receiving a common fraction of the photon flux from the scene. A delayed summing device (4) collects signals from the preamplifiers. A calibrating device (8) comprises a sensor (9) upstream of the main sensors and a circuit providing a stimulus (11) derived from this. The stimulus signal is applied to the pre-amplifiers before they receive the information from the main sensors.