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Journal of the Society of Motion Picture Engineers ( Volume: 23, Issue: 6, December 1934)
[ACTIVE]

A Rotating Mirror Oscilloscope

Metadata

Publisher
SMPTE — White Plains, NY, USA
Doc Type
Journal Article
Content Type
Original Research
Abbreviated Title
J SMPE
Volume
23, No. 6, pp. 328–337
Abstract
When studying sound it is sometimes useful to project the wave-form of electrical or acoustical phenomena on a screen. A rotating mirror in combination with a vibrating mirror and a light source provide a convenient means of showing such waves. The problem of building an instrument for such a purpose is comparatively simple if a small screen is used in a dark chamber. However, when the screen is large enough to be viewed by a dozen or more persons, many difficulties arise. The paper describes how the various parts of the apparatus may be coördinated in order to produce a comparatively bright, clearly defined wave with a small incandescent lamp in a room of average illumination. The vibrator used in the apparatus may be so constructed that its response is either inversely proportional to or independent of the frequency.
Publication Date
1934-12-01
DOI
10.5594/J08751
ISSN
Print: 0097-5834
Link
https://doi.org/10.5594/J08751
Author(s)
R. F. MallinaBell Telephone Laboratories, New York, N. Y.
Copyright
© 1934 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

  • 1. Wente E. C. Thuras A. L. : “Moving Coil Telephone Receivers and Microphones,” J. Acoust. Soc. of Amer. , III (July, 1931 ), No. 1 , p. 44 . EXTERNAL
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Preview:
R. F. Mallina; A Rotating Mirror Oscilloscope, Journal of the Society of Motion Picture Engineers ( Volume: 23, Issue: 6, December 1934); SMPTE, 1934. Available at https://doi.org/10.5594/J08751
Snippet:
R. F. Mallina; A Rotating Mirror Oscilloscope, Journal of the Society of Motion Picture Engineers ( Volume: 23, Issue: 6, December 1934); SMPTE, 1934. Available at https://doi.org/10.5594/J08751

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Preview:
R. F. Mallina; A Rotating Mirror Oscilloscope, Journal of the Society of Motion Picture Engineers ( Volume: 23, Issue: 6, December 1934); SMPTE, 1934. Available at https://doi.org/10.5594/J08751
Snippet:
<span class="citation">R. F. Mallina; <cite>A Rotating Mirror Oscilloscope</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 23, Issue: 6, December 1934); SMPTE, 1934. Available at <a href="https://doi.org/10.5594/J08751" target="_blank" rel="noopener">https://doi.org/10.5594/J08751</a></span>

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Preview:
R. F. Mallina; A Rotating Mirror Oscilloscope, Journal of the Society of Motion Picture Engineers ( Volume: 23, Issue: 6, December 1934); SMPTE, 1934
doi: 10.5594/J08751
url: https://doi.org/10.5594/J08751
Snippet:
<li>
R. F. Mallina; <cite id="bib-10-5594-j08751">A Rotating Mirror Oscilloscope</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 23, Issue: 6, December 1934); SMPTE, 1934
<span class="doi">10.5594/J08751</span>
</li>