Abstract
An ultra high-speed camera (with a framing rate of the order of 106 pictures per second) is described. This camera was constructed to observe the transient events occurring during the breaking of electrical contacts. Because of the unpredictable nature of the exact moment of break it was highly desirable to have an instrument capable of producing a large number of photographs. On account of the comparatively low light levels encountered during the breaking of the microscopic molten metal bridge, the system had to be capable of producing the maximum amount of illumination on the film, thus excluding systems in which the beam of light is split into several beams. The camera described consists in principle of two rotating mirror cameras in series, so that the total number of photographs produced is approximately the square of that obtained with conventional rotating mirror cameras.
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