DISPOSITIF DE MESURE D'EXPOSITION D'UN DETECTEUR D'IMAGE A L'ETAT SOLIDE SOUMIS A UN RAYONNEMENT IONISANT ET DETECTEUR D'IMAGE EQUIPE D'UN TEL DISPOSITIF DE MESURE

摘要

The invention concerns a device for measuring exposure of a solid state image sensor (1). Said detector (1) comprises a first surface (1a) exposed to an ionising radiation (R1) representing the image. It releases through another surface (1b) opposite the first (1a) an unabsorbed ionising radiation (R2). The measuring device is designed to be placed near the other surface and to be exposed to the unabsorbed ionising radiation (R2). It comprises at least one optical fibre (11) emitting a visible or nearly visible radiation, obtained by conversion in the optical fibre, towards at least a sensing device (13), the visible or nearly visible radiation representing the unabsorbed ionising radiation. The sensing device (13) generates a signal representing the image sensor exposure. The invention is in particular applicable to X-ray image sensors.