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Journal of the Society of Motion Picture Engineers ( Volume: 38, Issue: 1, January 1942)
[ACTIVE]

A New Dichroic Reflector and Its Application to Protocell Monitoring Systems

Metadata

Publisher
SMPTE
Doc Type
Journal Article
Article Type
research-article
Abstract
Certain crystals have long been known to transmit light of one color and reflect light of another color. Some thin metallic films also exhibit the same phenomena. By evaporating alternate layers of high and low-index insulators on glass, it is possible to produce a surface having predetermined transmission and reflection characteristics, and having no appreciable absorption. A method of determining the properties of multilayer films is described. Design details and curves are given for a three-layer film having its peak transmission at 4400 A and its peak reflection at 7920 A. This film is successfully employed in high-level photocell monitoring systems for sound recorders. Nearly all the actinic value of the modulated light is transmitted to the photographic film while a large part of the red and infrared is reflected to a cesium photocell for monitoring.
Publication Date
1942-01-01
DOI
10.5594/J09935
Link
https://doi.org/10.5594/J09935
Author(s)
G. L. Dimmick
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G. L. Dimmick; A New Dichroic Reflector and Its Application to Protocell Monitoring Systems, Journal of the Society of Motion Picture Engineers ( Volume: 38, Issue: 1, January 1942); SMPTE, 1942. Available at https://doi.org/10.5594/J09935
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G. L. Dimmick; A New Dichroic Reflector and Its Application to Protocell Monitoring Systems, Journal of the Society of Motion Picture Engineers ( Volume: 38, Issue: 1, January 1942); SMPTE, 1942. Available at https://doi.org/10.5594/J09935

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G. L. Dimmick; A New Dichroic Reflector and Its Application to Protocell Monitoring Systems, Journal of the Society of Motion Picture Engineers ( Volume: 38, Issue: 1, January 1942); SMPTE, 1942. Available at https://doi.org/10.5594/J09935
Snippet:
<span class="citation">G. L. Dimmick; <cite>A New Dichroic Reflector and Its Application to Protocell Monitoring Systems</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 38, Issue: 1, January 1942); SMPTE, 1942. Available at <a href="https://doi.org/10.5594/J09935" target="_blank" rel="noopener">https://doi.org/10.5594/J09935</a></span>

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Preview:
G. L. Dimmick; A New Dichroic Reflector and Its Application to Protocell Monitoring Systems, Journal of the Society of Motion Picture Engineers ( Volume: 38, Issue: 1, January 1942); SMPTE, 1942
doi: 10.5594/J09935
url: https://doi.org/10.5594/J09935
Snippet:
<li>
G. L. Dimmick; <cite id="bib-10-5594-j09935">A New Dichroic Reflector and Its Application to Protocell Monitoring Systems</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 38, Issue: 1, January 1942); SMPTE, 1942
<span class="doi">10.5594/J09935</span>
</li>