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Abstract
A brief survey of the development of the high-speed camera introduces the ultra high-speed image converter, capable of recording sub-microsecond phenomenon with framing rates as high as 2 × 107 p.p.s., and exposures as brief as 5 nanoseconds (5 ×10-9 sec.).
The principle of operation is explained, and the use of the camera in frame or streak mode discussed. Optical efficiency of these devices is considered and a case is made for the use of mirror objectives of the Schmidt type. Image intensification by the use of a second stage tube is also considered.
Applications of this system at the M.E.L. include research into the formation and development of electric arcs in rectifying valves, and switches. Some operational problems are outlined and the necessary development of a rapidly opening shutter of the collapsing-foil type explained.
Examples of some recorded picture sequences are presented.