COOLED DETECTING DEVICE

摘要

A device for detecting infrared radiation comprises a circuit (1) for detecting infrared radiation equipped with at least one photodetector. A read circuit (2) is electrically connected to the detecting circuit (1) and it is configured to process the signal emitted by the detecting circuit (1). A Joule-Thomson cooler cools a cold plate (3) thermally and mechanically connected to the detecting circuit (1) and to the read circuit (2). The cold plate (3) comprises an internal cavity (7) supplied with a gas mixture. An orifice (5) for expanding the gas mixture is placed at an inlet of the internal cavity (7). An outlet of a compressor (6) supplies the expansion orifice (5) with a gas mixture. The inlet of the compressor (6) receives the expanded gas mixture coming from an outlet of the internal cavity (7).