Direct Electron-Beam Film Scanning of Photographic Images

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Publisher: SMPTE
Doc Type: Journal Article
Article Type: research-article
Abstract: Flying-spot scanner system limitations are examined and a novel technique for overcoming them presented. A much-improved signal-to-noise ratio can be obtained by using a scintillator-coated film which, when scanned directly by the electron beam, emits light in direct contact with the photographic image. Both granularity noise and afterglow is sharply attenuated which makes possible bandwidths in excess of 50 MHz. A system incorporating this technique is described. Present system characteristics include a 20-MHz bandwidth while scanning a 5-in. photographic aerial film at a resolution of 100-line pairs/mm along the scannnng line. A description of the electron optical design and an automatic differentially pumped vacuum system is also presented.
Publication Date: 1968-01-01
DOI: 10.5594/J05866
Link: https://doi.org/10.5594/J05866
Author(s): K. F. Wallace

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K. F. Wallace; Direct Electron-Beam Film Scanning of Photographic Images, Journal of the SMPTE ( Volume: 77, Issue: 1, January 1968); SMPTE, 1968. Available at https://doi.org/10.5594/J05866

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K. F. Wallace; Direct Electron-Beam Film Scanning of Photographic Images, Journal of the SMPTE ( Volume: 77, Issue: 1, January 1968); SMPTE, 1968. Available at https://doi.org/10.5594/J05866

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K. F. Wallace; Direct Electron-Beam Film Scanning of Photographic Images, Journal of the SMPTE ( Volume: 77, Issue: 1, January 1968); SMPTE, 1968. Available at https://doi.org/10.5594/J05866

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<span class="citation">K. F. Wallace; <cite>Direct Electron-Beam Film Scanning of Photographic Images</cite>, Journal of the SMPTE ( Volume: 77, Issue: 1, January 1968); SMPTE, 1968. Available at <a href="https://doi.org/10.5594/J05866" target="_blank" rel="noopener">https://doi.org/10.5594/J05866</a></span>

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K. F. Wallace; Direct Electron-Beam Film Scanning of Photographic Images, Journal of the SMPTE ( Volume: 77, Issue: 1, January 1968); SMPTE, 1968
doi: 10.5594/J05866
url: https://doi.org/10.5594/J05866

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<li>
K. F. Wallace; <cite id="bib-10-5594-j05866">Direct Electron-Beam Film Scanning of Photographic Images</cite>, Journal of the SMPTE ( Volume: 77, Issue: 1, January 1968); SMPTE, 1968
<span class="doi">10.5594/J05866</span>
</li>