Abstract: Device for the real-time localization of radiation sources, comprising a pinhole chamber (4) whose walls form a shield, and, within the chamber and opposite the pinhole (16), a screen (28) which is transparent in the luminous range and capable of converting the source radiation into luminous radiation and of preventing the light in the area from reaching the screen while remaining transparent to the source radiation. A camera (30) is connected to the screen and provides an image of the sources in the form of electric signals, by virtue of the luminous radiation it receives from the screen, as well as an image of the area by virtue of the light it receives from this area through the screen when a shutter is open. The images can be superposed and can be made visible through signal processing and display.