The Purkinje after-image evoked by the sweep moving across cathode-ray tube screens was investigated. Threshold values for the disappearance of the image at low intensities of retinal illumination were found to vary from 0.61 to 15.5 photons for P-7 and P-11 phosphors. Threshold values for the high intensities at which the image completely disappears were found to be at about 200-250 photons, when the image loses its complimentary hue and becomes a faint achromatic trace. The threshold at which the remaining image disappears was about 1000 photons. (Author)


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    Titel :

    The Purkinje After-Image on Screens of Cathode-Ray Tubes


    Beteiligte:
    G. H. Mobray (Autor:in) / J. W. Gebhard (Autor:in)

    Erscheinungsdatum :

    1951


    Format / Umfang :

    14 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




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