Radiation source locating from distance device

This device is made up of a chamber with a pinhole, a radiophotoluminescent screen facing the pinhole, a latent image of the sources forming on this screen, a camera giving, in electric signal form, a zone image, optical means enabling the camera and the screen to watch the same scene, screen reading means giving, in electric signal form, a source image from the latent image and electronic means for signal processing and display, in order to superpose and visualize zone and source images. (Author). 1 fig., 3 refs