Light Sources as an Integral Part of the Color Photographic System

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Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Abbreviated Title: J SMPTE
Volume: 86, No. 8, pp. 537–543
Abstract: Newton stated that we do not “see” colored objects, but only perceive the spectral energy of a light source after selective reflection or transmission by natural objects. A color recording system reacts similarly. Thus, the light source is a predominant part of any color recording system, such as color photography. Color films have no chromatic adaptation mechanism such as the eye has. They are balanced for a specific light source. Color-reversal film is generally used for newsgathering. It does not allow for color corrections after the initial exposure as with the negative-positive process. Newsgathering is done under all types of light sources. Lamp manufacturers are mainly concerned with photometric properties only, such as luminous efficacy and specific luminous flux. Recently they have started to consider also the CIE color rendering index. Until now, little attention has been paid to the light source as an integral part of a color recording system. The author discusses the properties of light sources in relation to and as an integral part of a color-reversal film-recording system. The photometric properties of light sources and their CIE color rendering index only refer to visual color perception and do not spell out the photographic properties of light sources. A proposal is made which permits the evaluation of light sources as an integral part of color photographic systems.
Publication Date: 1977-08-01
DOI: 10.5594/J17865
ISSN: Print: 0036-1682
Link: https://doi.org/10.5594/J17865
Author(s): K. StaesAgfa-Gevaert N.V., R&D Laboratories, Septestraat 27, Mortsel B-2510, Belgium.
Copyright: © 1977 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

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K. Staes; Light Sources as an Integral Part of the Color Photographic System, SMPTE Journal ( Volume: 86, Issue: 8, August 1977); SMPTE, 1977. Available at https://doi.org/10.5594/J17865

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K. Staes; Light Sources as an Integral Part of the Color Photographic System, SMPTE Journal ( Volume: 86, Issue: 8, August 1977); SMPTE, 1977. Available at https://doi.org/10.5594/J17865

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<span class="citation">K. Staes; <cite>Light Sources as an Integral Part of the Color Photographic System</cite>, SMPTE Journal ( Volume: 86, Issue: 8, August 1977); SMPTE, 1977. Available at <a href="https://doi.org/10.5594/J17865" target="_blank" rel="noopener">https://doi.org/10.5594/J17865</a></span>

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K. Staes; Light Sources as an Integral Part of the Color Photographic System, SMPTE Journal ( Volume: 86, Issue: 8, August 1977); SMPTE, 1977
doi: 10.5594/J17865
url: https://doi.org/10.5594/J17865

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K. Staes; <cite id="bib-10-5594-j17865">Light Sources as an Integral Part of the Color Photographic System</cite>, SMPTE Journal ( Volume: 86, Issue: 8, August 1977); SMPTE, 1977
<span class="doi">10.5594/J17865</span>
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Photoscience [Active]