IMAGE TUBE WITH VIDEO OUTPUT, IMAGING SYSTEM USING SUCH A TUBE AND METHOD FOR OPERATING THE TUBE

摘要

The new image tube with video output comprises essentially inside a vacuum housing (E) a screen-photocathode assembly (EC-SC-S') forming a mosaic of elementary capacities, a field grid (g'1), thermoemissive cathodes (K1, K2) to bring back the potential of the photocathode to a reference potential, at least one optical window (F2) provided on the vacuum housing for the passage of a light beam sweeping the photocathode (C'), means (A') for collecting the electric signal obtained during the scanning and an electronic optics (g'2, g'3) for accelerating and directing the different flows of electrons or photoelectrons. Applications more particularly to radiology.