Journal of the Society of Motion Picture Engineers ( Volume: 33, Issue: 10, October 1939)

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Use of an A-C Polarized Photoelectric Cell for Light-Valve Bias Current Determination

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Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Abbreviated Title: J SMPE
Volume: 33, No. 10, pp. 394–397
Abstract: The use of an a-c polarizing potential on a gas type PEC produces an alternating output current as compared with the continuous current obtained with a d-c polarizing potential. If the output voltage from the cell is suitably connected to a conventional audio-frequency amplifier and copper-oxide rectifer meter, the equipment may be conveniently used as an exposure meter. When used for the line-up of variable-density light-valves, the proper bias current, lamp adjustment, and lamp current may be readily determined. Variations of valve spacing and lamp current are also indicated. Numerous other applications for such a meter are being con. sidered.
Publication Date: 1939-10-01
DOI: 10.5594/J11939
ISSN: Print: 0097-5834
Link: https://doi.org/10.5594/J11939
Author(s): C. R. Daily
Copyright: © 1939 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

1 Artzt M. : “Facsimile Transmission and Reception,” Facsimile Radio , Radio Institutes Tech. Press , I (Oct., 1938 ), p. 159 . EXTERNAL

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C. R. Daily; Use of an A-C Polarized Photoelectric Cell for Light-Valve Bias Current Determination, Journal of the Society of Motion Picture Engineers ( Volume: 33, Issue: 10, October 1939); SMPTE, 1939. Available at https://doi.org/10.5594/J11939

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C. R. Daily; Use of an A-C Polarized Photoelectric Cell for Light-Valve Bias Current Determination, Journal of the Society of Motion Picture Engineers ( Volume: 33, Issue: 10, October 1939); SMPTE, 1939. Available at https://doi.org/10.5594/J11939

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<span class="citation">C. R. Daily; <cite>Use of an A-C Polarized Photoelectric Cell for Light-Valve Bias Current Determination</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 33, Issue: 10, October 1939); SMPTE, 1939. Available at <a href="https://doi.org/10.5594/J11939" target="_blank" rel="noopener">https://doi.org/10.5594/J11939</a></span>

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<li>
C. R. Daily; <cite id="bib-10-5594-j11939">Use of an A-C Polarized Photoelectric Cell for Light-Valve Bias Current Determination</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 33, Issue: 10, October 1939); SMPTE, 1939
<span class="doi">10.5594/J11939</span>
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