A New Automatic Iris Control for Motion-Picture Cameras

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Publisher: SMPTE
Doc Type: Journal Article
Article Type: research-article
Abstract: The Bell & Howell Company's new Design 200-EE camera incorporates a self-powered compact automatic iris control. Mechanical power to drive the lens iris originates from a small direct-current, permanent-magnet motor driven by mercury batteries. A photovoltaic cell deflects a relay meter according to average scene brightness, and opening or closing the motor-battery circuit causes the lens iris to be properly positioned. The camera and its method of use are described.
Publication Date: 1957-07-01
DOI: 10.5594/J13879
Link: https://doi.org/10.5594/J13879
Author(s): Mervin W. La Rue

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Mervin W. La Rue; A New Automatic Iris Control for Motion-Picture Cameras, Journal of the SMPTE ( Volume: 66, Issue: 7, July 1957); SMPTE, 1957. Available at https://doi.org/10.5594/J13879

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Mervin W. La Rue; A New Automatic Iris Control for Motion-Picture Cameras, Journal of the SMPTE ( Volume: 66, Issue: 7, July 1957); SMPTE, 1957. Available at https://doi.org/10.5594/J13879

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Mervin W. La Rue; A New Automatic Iris Control for Motion-Picture Cameras, Journal of the SMPTE ( Volume: 66, Issue: 7, July 1957); SMPTE, 1957. Available at https://doi.org/10.5594/J13879

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<span class="citation">Mervin W. La Rue; <cite>A New Automatic Iris Control for Motion-Picture Cameras</cite>, Journal of the SMPTE ( Volume: 66, Issue: 7, July 1957); SMPTE, 1957. Available at <a href="https://doi.org/10.5594/J13879" target="_blank" rel="noopener">https://doi.org/10.5594/J13879</a></span>

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Mervin W. La Rue; A New Automatic Iris Control for Motion-Picture Cameras, Journal of the SMPTE ( Volume: 66, Issue: 7, July 1957); SMPTE, 1957
doi: 10.5594/J13879
url: https://doi.org/10.5594/J13879

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<li>
Mervin W. La Rue; <cite id="bib-10-5594-j13879">A New Automatic Iris Control for Motion-Picture Cameras</cite>, Journal of the SMPTE ( Volume: 66, Issue: 7, July 1957); SMPTE, 1957
<span class="doi">10.5594/J13879</span>
</li>