A Rotating-Mirror Framing Camera with Multiple Focal-Plane Shutters

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Publisher: SMPTE
Doc Type: Journal Article
Article Type: research-article
Abstract: In the preceding paper by Jacobs, a new family of rotating-mirror framing cameras has been discussed. This paper describes a camera in this family in which a number of concave mirrors are used with a single rotating mirror to create a connected sequence of images which pass several slits that act as focal-plane shutters. The images seen through the slits are relayed to form separate rows of frames by means of a smear-camera arrangement. By combining 36 concave mirrors with six properly phased slits, a total of 216 frames can be recorded in approximately 1/8 revolution of a rotating mirror. The camera now being constructed at the Naval Ordnance Laboratory will use two mirrored faces, 6 by 2 in., of a rectangular rotating mirror. At the anticipated rotor speed of 600 rps approximately 106 frames/sec will be attained. Each frame will be about 0.75 in. high and 1.0 in. wide. It will be possible to vary the shutter-to-framing-time ratio from about 0.5 to about 0.02 by varying the width of the slits used in the camera. The effective aperture will remain fixed at about f/22.
Publication Date: 1960-11-01
DOI: 10.5594/J15551
Link: https://doi.org/10.5594/J15551
Author(s): Sigmund J. Jacobs, J. D. McLanahan, P. F. Donovan

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Sigmund J. Jacobs, J. D. McLanahan, and P. F. Donovan; A Rotating-Mirror Framing Camera with Multiple Focal-Plane Shutters, Journal of the SMPTE ( Volume: 69, Issue: 11, November 1960); SMPTE, 1960. Available at https://doi.org/10.5594/J15551

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Sigmund J. Jacobs, J. D. McLanahan, and P. F. Donovan; A Rotating-Mirror Framing Camera with Multiple Focal-Plane Shutters, Journal of the SMPTE ( Volume: 69, Issue: 11, November 1960); SMPTE, 1960. Available at https://doi.org/10.5594/J15551

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<span class="citation">Sigmund J. Jacobs, J. D. McLanahan, and P. F. Donovan; <cite>A Rotating-Mirror Framing Camera with Multiple Focal-Plane Shutters</cite>, Journal of the SMPTE ( Volume: 69, Issue: 11, November 1960); SMPTE, 1960. Available at <a href="https://doi.org/10.5594/J15551" target="_blank" rel="noopener">https://doi.org/10.5594/J15551</a></span>

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<li>
Sigmund J. Jacobs, J. D. McLanahan, and P. F. Donovan; <cite id="bib-10-5594-j15551">A Rotating-Mirror Framing Camera with Multiple Focal-Plane Shutters</cite>, Journal of the SMPTE ( Volume: 69, Issue: 11, November 1960); SMPTE, 1960
<span class="doi">10.5594/J15551</span>
</li>