Abstract: The invention relates to a system for target designation and/or illumination in a scene, that is designed to be attached to an aircraft comprising one optical path fitted with a matrix sensor forming an image of the scene, each image corresponding to an instantaneous field centered around a line of sight LV, and fitted with a device for deflecting the LV at a determined speed Vd making it possible to carry out a scan in order to perform the target designation and illumination function. The system comprises an additional device for deflecting the LV at a speed Vr making it possible to carry out a counter-scan in order also to perform an air reconnaissance function.