Lighting for Color Television with a System of Metal Halide Lamps

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Publisher: SMPTE
Doc Type: Journal Article
Article Type: research-article
Abstract: Temperature radiators are briefly discussed and their fixed spectral distribution for a given operating condition is mentioned. The generation of light in a high-pressure vapor discharge lamp and the relevant physical theory and mechanisms are described, including the effect of the introduction of a metallic element such as lithium. Formulas for the calculation of a lamp's light efficiency and flux as a function of the number of excited particles are given. Halides may be added as emission boosters. The addition of rare earth elements produces closely packed spectral lines. The conditions that metal halide lamps must meet for color television are considered. By introducing Hg, Na, Tl, In and Li into the envelope and adjusting energy ratios between the spectral lines, a 5000-K. daylight booster light can be produced. Some experiences with this lamp, the HQI 1000 C, are described and its technical parameters are given. A specifically adjusted combination of Hg, Tl, Na and Li—plus the halide as emission booster—yields a low-color-temperature lamp, the light of which can readily be mixed with that of 3200-K. incandescent studio lamps. For the blue-screen process special lamps can be designed by using In and Ga. Investigations have demonstrated that the three types of lamps are possible in principle. A unified type of lamp construction, based on the HQI 1000 C model, is used.
Publication Date: 1974-01-01
DOI: 10.5594/J07619
Link: https://doi.org/10.5594/J07619
Author(s): Uwe-Jens Amlong, Jürgen Heller, Lutz Grambow, Hans-Raimar Pohlenz

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Uwe-Jens Amlong, Jürgen Heller, Lutz Grambow, and Hans-Raimar Pohlenz; Lighting for Color Television with a System of Metal Halide Lamps, Journal of the SMPTE ( Volume: 83, Issue: 1, January 1974); SMPTE, 1974. Available at https://doi.org/10.5594/J07619

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Uwe-Jens Amlong, Jürgen Heller, Lutz Grambow, and Hans-Raimar Pohlenz; Lighting for Color Television with a System of Metal Halide Lamps, Journal of the SMPTE ( Volume: 83, Issue: 1, January 1974); SMPTE, 1974. Available at https://doi.org/10.5594/J07619

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<span class="citation">Uwe-Jens Amlong, Jürgen Heller, Lutz Grambow, and Hans-Raimar Pohlenz; <cite>Lighting for Color Television with a System of Metal Halide Lamps</cite>, Journal of the SMPTE ( Volume: 83, Issue: 1, January 1974); SMPTE, 1974. Available at <a href="https://doi.org/10.5594/J07619" target="_blank" rel="noopener">https://doi.org/10.5594/J07619</a></span>

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<li>
Uwe-Jens Amlong, Jürgen Heller, Lutz Grambow, and Hans-Raimar Pohlenz; <cite id="bib-10-5594-j07619">Lighting for Color Television with a System of Metal Halide Lamps</cite>, Journal of the SMPTE ( Volume: 83, Issue: 1, January 1974); SMPTE, 1974
<span class="doi">10.5594/J07619</span>
</li>