Further Investigations into Continuously Variable, Remote Color Temperature Adjustments for Metal Halide Lamps

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Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Abbreviated Title: SMPTE J
Volume: 103, No. 7, pp. 428–433
Abstract: A filtering system using liquid organic colorants as optical filters for metal halide HMI lamps is discussed. The liquid filtering solution is continuously circulated, allowing variations in the solutions concentration to effect color temperature changes. In this study, three colorants in a water solvent were used to bring an HMI globe with a color temperature of about 5500°K down to 3200°K. This was done using the organic chemicals methylene orange, methyl blue, and acid fuchsin in combination. Many advantages of this technique over the use of gelatin filters have been identified. Among these, infinite variability in color temperature control, speed with which color temperature changes can be effected, and reduction of heat directly in front of the light source are the most important.
Publication Date: 1994-07-01
DOI: 10.5594/J15307
ISSN: Print: 0036-1682
Link: https://doi.org/10.5594/J15307
Author(s): A. KetsdeverUniversity of Southern California, Entertainment Technology Program, Los Angeles, CA 90089
W. OmensUniversity of Southern California, Entertainment Technology Program, Los Angeles, CA 90089
E. P. MuntzUniversity of Southern California, Entertainment Technology Program, Los Angeles, CA 90089
Copyright: © 1994 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

1. Elenbaas W. , Light Sources , p. 6 , Crane, Russak & Co., Inc. : New York , 1972 . EXTERNAL
2. Lothian G.F. , Absorption Spectrophotometry , pp. 19 – 20 , Adam Hilger Ltd. : London , 1969 . EXTERNAL
3. Ketsdever A. Omens W. Muntz E. P. , “Continuously Variable Remote Color Temperature Adjustments for Metal-Halide Lamps in Cinematographic Applications,” SMPTE J. , /0/: 481 – 487 , July 1992 . EXTERNAL
4. Okawara M. Kitao T. Hiroshima T. Matsuoka M. , Organic Colorants , Elsevier : New York , 1988 . EXTERNAL
5. Fabian J. Hartman H. , Light Absorption of Organic Colorants , Springer-Verlag : New York , 1980 . EXTERNAL

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A. Ketsdever, W. Omens, and E. P. Muntz; Further Investigations into Continuously Variable, Remote Color Temperature Adjustments for Metal Halide Lamps, SMPTE Journal ( Volume: 103, Issue: 7, July 1994); SMPTE, 1994. Available at https://doi.org/10.5594/J15307

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A. Ketsdever, W. Omens, and E. P. Muntz; Further Investigations into Continuously Variable, Remote Color Temperature Adjustments for Metal Halide Lamps, SMPTE Journal ( Volume: 103, Issue: 7, July 1994); SMPTE, 1994. Available at https://doi.org/10.5594/J15307

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<span class="citation">A. Ketsdever, W. Omens, and E. P. Muntz; <cite>Further Investigations into Continuously Variable, Remote Color Temperature Adjustments for Metal Halide Lamps</cite>, SMPTE Journal ( Volume: 103, Issue: 7, July 1994); SMPTE, 1994. Available at <a href="https://doi.org/10.5594/J15307" target="_blank" rel="noopener">https://doi.org/10.5594/J15307</a></span>

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<li>
A. Ketsdever, W. Omens, and E. P. Muntz; <cite id="bib-10-5594-j15307">Further Investigations into Continuously Variable, Remote Color Temperature Adjustments for Metal Halide Lamps</cite>, SMPTE Journal ( Volume: 103, Issue: 7, July 1994); SMPTE, 1994
<span class="doi">10.5594/J15307</span>
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