A proximity focused microchannel plate image-intensifier(MCP I~2)can always serve as afast optical shutter due to its high temporal and spatial resolution,large spectral and input intensityrange,high gain as well as the possibility of transient recording of single-shot events.The MCP I~2 tube combined with a gating pulse generator constitutes the simplest image-convertercamera with a high light gain and a fast response.In this paper,three different modes of gating fora typical 18mm“Generation Ⅱ”MCP I~2 tube(ITT type F4111)are compared.On the basis ofthe above considerations,a new circuit is developed for fast gating at the photocathode of an image-intensifier and for the generation of large-amplitude nanosecond pulses.With this gating generator,a camera exposure time of about 2 ns has been obtained.The matching of the gating generatorwith the image-intensifier is also discussed.A simple and efficient method is presented to eliminatethe multi-exposure effect which must be avoided in high-speed photography. A proximity focused microchannel plate image-intensifier (MCP I ~ 2) can always serve as a fast optical shutter due to its high temporal and spatial resolution, large spectral and input intensityrange, high gain as well as the possibility of transient recording of single-shot events. The MCP I ~ 2 tube combined with a gating pulse generator constitutes the simplest image-convertercamera with a high light gain and a fast response. This paper, three different modes of gating fora typical 18mm “Generation II” MCP I ~ 2 tube (ITT type F4111) are compared. On the basis of the above considerations, a new circuit is developed for fast gating at the photocathode of an image-intensifier and for the generation of large-amplitude nanosecond pulses. Here this gating generator, a camera exposure time of about 2 ns has been obtained. matching of the gating generator with the image-intensifier is also discussed. A simple and efficient method is presented to eliminate the multi-exposure effect which must be avoided in high-speed photography.