A laser target seeker device arranged to receive a laser beam reflected from an object. Detector elements are arranged to detect the reflected laser beam. A processor is arranged to determine the received radiation on the respective detector element in order to determine the origin of the laser beam. A diffractor is arranged relative to the detector elements and configured to diffract the reflected laser beam into portions prior to being detected by the detector elements. The detector elements are arranged to detect the respective portion. A flyable body is for hitting a target by means of a laser beam. A system for hitting a target by means of a laser beam. A method for detecting a laser beam reflected from an object. Use of a kinoform member in a laser target seeker for diffracting a laser beam.