Journal of the Society of Motion Picture Engineers ( Volume: 49, Issue: 2, August 1947)

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Remote Control and Automatic Focusing of Lenses

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Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Abbreviated Title: J SMPE
Volume: 49, No. 2, pp. 130–139
Abstract: A servo-type of mechanism has been devised which automatically will maintain a lens in focus under the guidance of any one of a number of distance-measuring devices, or which may be arranged to replace the Selsyn-type of remote control for focusing a lens. The mechanism requires no special cam or nonlinear element to fit a particular lens, but automatically solves the equation of any lens for which it may be adjusted at the moment. When replacing a Selsyn system this servomechanism has the advantage that it can never get out of step. The system is particularly applicable to motion picture camera lenses in follow-focus work.
Publication Date: 1947-08-01
DOI: 10.5594/J17824
ISSN: Print: 0097-5834
Link: https://doi.org/10.5594/J17824
Author(s): H. C. Silent
Copyright: © 1947 Society of Motion Picture and Television Engineers, Inc.

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H. C. Silent; Remote Control and Automatic Focusing of Lenses, Journal of the Society of Motion Picture Engineers ( Volume: 49, Issue: 2, August 1947); SMPTE, 1947. Available at https://doi.org/10.5594/J17824

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H. C. Silent; Remote Control and Automatic Focusing of Lenses, Journal of the Society of Motion Picture Engineers ( Volume: 49, Issue: 2, August 1947); SMPTE, 1947. Available at https://doi.org/10.5594/J17824

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<span class="citation">H. C. Silent; <cite>Remote Control and Automatic Focusing of Lenses</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 49, Issue: 2, August 1947); SMPTE, 1947. Available at <a href="https://doi.org/10.5594/J17824" target="_blank" rel="noopener">https://doi.org/10.5594/J17824</a></span>

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H. C. Silent; Remote Control and Automatic Focusing of Lenses, Journal of the Society of Motion Picture Engineers ( Volume: 49, Issue: 2, August 1947); SMPTE, 1947
doi: 10.5594/J17824
url: https://doi.org/10.5594/J17824

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<li>
H. C. Silent; <cite id="bib-10-5594-j17824">Remote Control and Automatic Focusing of Lenses</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 49, Issue: 2, August 1947); SMPTE, 1947
<span class="doi">10.5594/J17824</span>
</li>