Journal of the Society of Motion Picture Engineers ( Volume: 50, Issue: 5, May 1948)
[ACTIVE]
Optical Sound-Track Printing
Metadata
- Publisher
- SMPTE — White Plains, NY, USA
- Doc Type
- Journal Article
- Content Type
- Original Research
- Abbreviated Title
- J SMPE
- Volume
- 50, No. 5, pp. 458–473
- Abstract
- It is well known that the nearly universal practice of printing sound tracks by contact on the periphery of a rotating sprocket introduces significant amounts of flutter, and also amplitude modulation of the higher frequencies of the record, principally at the sprocket-hole frequency. — An optical one-to-one ratio printer in which the negative and the printing stock are driven separately by good constant-speed mechanisms has given substantially improved quality in printing 16-mm sound tracks. In contact prints of 7000-cycle records it is easy to demonstrate rapid fluctuations of output level of the order of 6 to 8 decibels. In optical prints from the same negatives such fluctuations do not exceed 1/2 decibel. High-frequency response is improved, to the extent of 5 decibels at 7000 cycles. The cross-modulation cancellation density for variable-area track prints is increased by about 0.1 in the region of practical interest. Listening tests show an immediately noticeable improvement in quality when optical prints are compared with contact prints made from the same negatives. — The optical system for sound-track printing must be able to resolve patterns several times finer than the highest frequencies on the sound negative, and, for printing on color films, must be especially free from the higher-order chromatic aberrations, secondary spectrum and chromatic variation of spherical aberration. Ordinary photographic lenses are unsuitable. One system which meets the requirements using commercially available microscope lenses is described.
- Publication Date
- 1948-05-01
- DOI
10.5594/J12600- ISSN
- Print:
0097-5834 - Link
- https://doi.org/10.5594/J12600
- Author(s)
- John A. MaurerJ. A. Maurer, Inc., Long Island City, New York
- Details
- need to add references
- Copyright
- © 1948 Society of Motion Picture and Television Engineers, Inc.
Bibliographic Reference(s)
- A Shrinkage-Compensating Sound Printer [Active]
- A Non-Slip Sound Printer [Active]
- Optical Reduction Sound Printing [Active]
- Sound Film Printing - II [Active]
- Sound Film Printing [Active]
- Modulated high-frequency recording as a means of determining conditions for optimal processing [Active]
- (10) Reference 9, p. 136 . EXTERNAL
- (11) Reference 9, p. 167 . EXTERNAL
- (12) Kellogg E. W. , U. S. Patent No. 1,892,554, December 27, 1932 , Re. 19270, August 14, 1934. EXTERNAL
- (13) American Standard Z22.52–1946. EXTERNAL
- (5) Batsel C. N. Sachtleben L. T. Dimmick G. L. , “Optical reduction soand printing,” , J. Soc. Mot. Pict. Eng. , vol. 33 , p. 108 ; August, 1934 . EXTERNAL
- (6) Maurer J. A. , “The present technical status of 16-mm soand film,” , J. Soc. Mot. Pict. Eng. , vol. 33 , p. 318 ; September, 1939 . EXTERNAL
- (7) Garity W. E. Hawkins J. U. A. , “Fantasound,” , J. Soc. Mot. Pict. Eng. , vol. 37 , p. 135 ; August, 1941 . EXTERNAL
- (8) Hardy Perrin , “The Principles of Optics,” McGraw-Hill Book Co. , New York, N. Y. , p. 132 . EXTERNAL
- (9) Conrady A. E. , “Applied Optics and Optical Design,” Oxford University Press , London, England , 1929 , p. 133 . EXTERNAL
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John A. Maurer; Optical Sound-Track Printing, Journal of the Society of Motion Picture Engineers ( Volume: 50, Issue: 5, May 1948); SMPTE, 1948. Available at https://doi.org/10.5594/J12600
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John A. Maurer; Optical Sound-Track Printing, Journal of the Society of Motion Picture Engineers ( Volume: 50, Issue: 5, May 1948); SMPTE, 1948. Available at https://doi.org/10.5594/J12600
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John A. Maurer; Optical Sound-Track Printing, Journal of the Society of Motion Picture Engineers ( Volume: 50, Issue: 5, May 1948); SMPTE, 1948. Available at https://doi.org/10.5594/J12600
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<span class="citation">John A. Maurer; <cite>Optical Sound-Track Printing</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 50, Issue: 5, May 1948); SMPTE, 1948. Available at <a href="https://doi.org/10.5594/J12600" target="_blank" rel="noopener">https://doi.org/10.5594/J12600</a></span>
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John A. Maurer; Optical Sound-Track Printing, Journal of the Society of Motion Picture Engineers ( Volume: 50, Issue: 5, May 1948); SMPTE, 1948
doi: 10.5594/J12600
url: https://doi.org/10.5594/J12600
doi: 10.5594/J12600
url: https://doi.org/10.5594/J12600
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<li> John A. Maurer; <cite id="bib-10-5594-j12600">Optical Sound-Track Printing</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 50, Issue: 5, May 1948); SMPTE, 1948 <span class="doi">10.5594/J12600</span> </li>