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Journal of the Society of Motion Picture Engineers ( Volume: 42, Issue: 5, May 1944)
[ACTIVE]

Improvement in Illumination Efficiency of Motion Picture Printers

Metadata

Publisher
SMPTE
Doc Type
Journal Article
Article Type
research-article
Abstract
Motion picture printers now in common use were designed to be operated at a moderate running speed with a single type of film of such emulsion speed that ample exposures were obtained by the use of low-wattag tungsten lamps. Recently the use of a variety of fine-grain films has made necessary greater exposure intensities. Tungsten lamps of higher wattage or mercury-vapor lamps have satisfied, the need for increased light intensity in some cases, but have not been found practicable for use in others. Greater optical efficiency is needed in many of the printers. This can be obtained by the use of light-collecting systems involving the use of either condensers or reflectors. Some special problems are introduced by the peculiarities of the mechanical arrangements of the printers and sometimes by the requirement of uniformity of illumination, both at the printing aperture and at the light-change aperture. Examples showing the application of condenser and reflector systems to 2 typical printers are given with a detailed description of the optical design as well as of the mechanical problems encountered. Data are given on the increase in illumination efficiency obtainable in practice.
Publication Date
1944-05-01
DOI
10.5594/J08446
Link
https://doi.org/10.5594/J08446
Author(s)
C. J. Kunz, H. E. Goldberg, C. E. Ives
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C. J. Kunz, H. E. Goldberg, and C. E. Ives; Improvement in Illumination Efficiency of Motion Picture Printers, Journal of the Society of Motion Picture Engineers ( Volume: 42, Issue: 5, May 1944); SMPTE, 1944. Available at https://doi.org/10.5594/J08446
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C. J. Kunz, H. E. Goldberg, and C. E. Ives; Improvement in Illumination Efficiency of Motion Picture Printers, Journal of the Society of Motion Picture Engineers ( Volume: 42, Issue: 5, May 1944); SMPTE, 1944. Available at https://doi.org/10.5594/J08446

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C. J. Kunz, H. E. Goldberg, and C. E. Ives; Improvement in Illumination Efficiency of Motion Picture Printers, Journal of the Society of Motion Picture Engineers ( Volume: 42, Issue: 5, May 1944); SMPTE, 1944. Available at https://doi.org/10.5594/J08446
Snippet:
<span class="citation">C. J. Kunz, H. E. Goldberg, and C. E. Ives; <cite>Improvement in Illumination Efficiency of Motion Picture Printers</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 42, Issue: 5, May 1944); SMPTE, 1944. Available at <a href="https://doi.org/10.5594/J08446" target="_blank" rel="noopener">https://doi.org/10.5594/J08446</a></span>

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Preview:
C. J. Kunz, H. E. Goldberg, and C. E. Ives; Improvement in Illumination Efficiency of Motion Picture Printers, Journal of the Society of Motion Picture Engineers ( Volume: 42, Issue: 5, May 1944); SMPTE, 1944
doi: 10.5594/J08446
url: https://doi.org/10.5594/J08446
Snippet:
<li>
C. J. Kunz, H. E. Goldberg, and C. E. Ives; <cite id="bib-10-5594-j08446">Improvement in Illumination Efficiency of Motion Picture Printers</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 42, Issue: 5, May 1944); SMPTE, 1944
<span class="doi">10.5594/J08446</span>
</li>