An image intensifier tube and a night vision system fitted with such a tube. The tube body of the image intensifier tube includes a multilayer ceramic substrate fixed in a sealed manner to an input device and to an output device so as to assure leaktightness of a vacuum chamber delimited by the tube body. The multilayer substrate also maintains a microchannel plate arranged between a photocathode and a phosphorus screen, and supplies voltage to the photocathode, the plate, and the phosphorus screen.