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Transactions of the Society of Motion Picture Engineers ( Volume: 10, Issue: 25, May 1926)
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The Effect on Screen Illumination of Bubbles, Seeds and Striations in the Bulbs of Projection Lamps

Metadata

Publisher
SMPTE
Doc Type
Journal Article
Article Type
research-article
Abstract
In Blowing glass bulbs for projection lamps, there occasionally occurs in the glass small bubbles or slight ridges on the glass known as “striations.” Sometimes, a small mold mark is left in the glass. It seems to be impossible to entirely eliminate all of these little flaws. On several occasions, complaints have been received that blisters in lamp bulbs have been the cause of poor screen illumination. All of these complaints have been indefinite, and no specific data seemed to be available on the subject. In order to determine definitely whether or not there was any such detrimental effect, the authors, conducted a series of tests on lamps of various sizes and in different types of projectors.
Publication Date
1926-05-01
DOI
10.5594/J10287
Link
https://doi.org/10.5594/J10287
Author(s)
L. C. Porter, W. S. Hadaway
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L. C. Porter and W. S. Hadaway; The Effect on Screen Illumination of Bubbles, Seeds and Striations in the Bulbs of Projection Lamps, Transactions of the Society of Motion Picture Engineers ( Volume: 10, Issue: 25, May 1926); SMPTE, 1926. Available at https://doi.org/10.5594/J10287
Snippet:
L. C. Porter and W. S. Hadaway; The Effect on Screen Illumination of Bubbles, Seeds and Striations in the Bulbs of Projection Lamps, Transactions of the Society of Motion Picture Engineers ( Volume: 10, Issue: 25, May 1926); SMPTE, 1926. Available at https://doi.org/10.5594/J10287

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L. C. Porter and W. S. Hadaway; The Effect on Screen Illumination of Bubbles, Seeds and Striations in the Bulbs of Projection Lamps, Transactions of the Society of Motion Picture Engineers ( Volume: 10, Issue: 25, May 1926); SMPTE, 1926. Available at https://doi.org/10.5594/J10287
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<span class="citation">L. C. Porter and W. S. Hadaway; <cite>The Effect on Screen Illumination of Bubbles, Seeds and Striations in the Bulbs of Projection Lamps</cite>, Transactions of the Society of Motion Picture Engineers ( Volume: 10, Issue: 25, May 1926); SMPTE, 1926. Available at <a href="https://doi.org/10.5594/J10287" target="_blank" rel="noopener">https://doi.org/10.5594/J10287</a></span>

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L. C. Porter and W. S. Hadaway; The Effect on Screen Illumination of Bubbles, Seeds and Striations in the Bulbs of Projection Lamps, Transactions of the Society of Motion Picture Engineers ( Volume: 10, Issue: 25, May 1926); SMPTE, 1926
doi: 10.5594/J10287
url: https://doi.org/10.5594/J10287
Snippet:
<li>
L. C. Porter and W. S. Hadaway; <cite id="bib-10-5594-j10287">The Effect on Screen Illumination of Bubbles, Seeds and Striations in the Bulbs of Projection Lamps</cite>, Transactions of the Society of Motion Picture Engineers ( Volume: 10, Issue: 25, May 1926); SMPTE, 1926
<span class="doi">10.5594/J10287</span>
</li>