A Motion-Picture Film Cue System Based Upon Infrared Diffraction

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Publisher: SMPTE
Doc Type: Journal Article
Article Type: research-article
Abstract: A new cue system for motion-picture printers is based upon the incoherent diffraction of infrared radiation. It is completely interchangeable with and compatible with present RF and notch cue systems. Diffraction cues are placed on the film. The detector is on the printing machine. The punched paper tapes used to encode the printer light changes remain unmodified. A cue consists of inscribed, finely spaced parallel lines located in an area bounded by the edge of the film, the picture frame and the adjacent sprocket holes. A pattern of inscribed lines causes a “blaze” or sharp line of radiation to be incoherently diffracted in a direction orthogonal to the lines. The appropriately placed detector senses only the diffracted radiation when a cue passes into the optics. With solid-state electronics, signals are amplified, time delays injected (if desired) and the printer light changes triggered. The cues are inscribed on the film in 1 s by one battery-powered cue applicator.
Publication Date: 1968-06-01
DOI: 10.5594/J05809
Link: https://doi.org/10.5594/J05809
Author(s): Gerald Stone, Donald B. McLaughlin, David L. Peters

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Gerald Stone, Donald B. McLaughlin, and David L. Peters; A Motion-Picture Film Cue System Based Upon Infrared Diffraction, Journal of the SMPTE ( Volume: 77, Issue: 6, June 1968); SMPTE, 1968. Available at https://doi.org/10.5594/J05809

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Gerald Stone, Donald B. McLaughlin, and David L. Peters; A Motion-Picture Film Cue System Based Upon Infrared Diffraction, Journal of the SMPTE ( Volume: 77, Issue: 6, June 1968); SMPTE, 1968. Available at https://doi.org/10.5594/J05809

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<span class="citation">Gerald Stone, Donald B. McLaughlin, and David L. Peters; <cite>A Motion-Picture Film Cue System Based Upon Infrared Diffraction</cite>, Journal of the SMPTE ( Volume: 77, Issue: 6, June 1968); SMPTE, 1968. Available at <a href="https://doi.org/10.5594/J05809" target="_blank" rel="noopener">https://doi.org/10.5594/J05809</a></span>

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<li>
Gerald Stone, Donald B. McLaughlin, and David L. Peters; <cite id="bib-10-5594-j05809">A Motion-Picture Film Cue System Based Upon Infrared Diffraction</cite>, Journal of the SMPTE ( Volume: 77, Issue: 6, June 1968); SMPTE, 1968
<span class="doi">10.5594/J05809</span>
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