Image converter — A new high-speed photographic device

The photographic device to be described was designed for an application of the image converter tube to provide a narrow rectangular field of view and a succession of exposures of the object at fixed time intervals. Its distinctive properties are: exposure time, 0.4 microseconds; frame rate, 200,000 per second; magnification from photocathode to fluorescent screen, 4 times; light gain of unity and electrical synchronization from an external source of either a single frame or a sequence of nine frames, arranged to fall parallel to each other in a row across the face of the tube. The size of the frames is controlled by the width of an input slit.