Abstract
THE technique of recording cathode ray oscillograph traces was the subject chosen for the November meeting of the Association for Scientific Photography, the speakers being Mr. W. Nethercot (E. R. A.) and Mr. N. Hendry (Botax, Ltd.)- Mr. Nethercot's paper dealt with the recording of high-speed transient phenomena by hot-cathode glass-bulb tubes, and examples were shown of wave-forms of 20 Me./sec. and above. In single transient recording the beam traverses the screen only once, and the exposure time of the film is therefore determined by the duration of the glow from the screen, since the actual traverse tune may be only a fraction of a microsecond. Photography by direct contact of the film with the screen has so many disadvantages that it is only suitable for transients of simple wave-shape where blurring of the trace and curvature of the screen do not affect the result appreciably. The most satisfactory method is by means of a specially designed camera.
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Recording Cathode Ray Oscillograph Traces. Nature 152, 656–657 (1943). https://doi.org/10.1038/152656d0
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DOI: https://doi.org/10.1038/152656d0