| 摘要 |
The disclosure concerns the observations of very fast light phenomena. It is desired to temporarily store a series of images arriving at a fast rate (one every 10 nanoseconds) for a duration (one microsecond) that gives enough time receive an order of selection of an image which is worthwile for analysis. The other images, which had been stored solely in case one of them might be interesting, are eliminated as and when they are not selected. An electron tube is used for the conversion of light images into packets of electrons. Each packet represents an image. The packets move in the tube from one end to the other, behind one another. The method and device disclosed make use of the property that these packets of electrons have, of moving far more slowly than light if the electrical fields in the tube are weak. It is therefore possible to temporarily store a large number of images in the form of these packets of electrons travelling in the tube for a duration which may be one microsecond. At the end of the trip, a selection grid enables a desired image to be selected and sent to the output face of the tube.
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