ACTIVITY REPORT DIVISION 1 - cie

Lux et Color Vespremiensis, Veszprém, 2007. október 19.
Some articles have given a short overview about actual results on mesopic vision and the
consequences for new installation of road lighting. These articles have shown it is indisputable
that white light has psychological and physiological benefits and they therefore recommend it.
On the other hand one has to realize that a decrease of light level leads to an increase in
threshold contrast for foveal objects. Therefore it is necessary to consider a concrete situation
and with the help of luminance pictures to decide whether the street illumination should be
changed or not.
With this knowledge and the recommended measurement techniques a reply can be given to
the question of whether all sodium lamps should be replaced by lamps with white light in the
public lighting.
Mesopic vision – Should we replace all sodium lamps by lamps with white light in our public
lighting?
S. Völker
In Proceedings CIE Congress 2007 Beijing
Do light sources with a high part of shorter wavelength promote safety?
S. Völker
In Proceedings ISAL 2007, 24-26. September, Darmstadt
R1-37 (V) Definition of the Visual Field for Conspicuity: N Itoh JP
Year Established: 2004
Terms of Reference: To summarize the literature on the Visual Field for conspicuity and
make a recommendation for terms of reference for a Technical Committee.
Report:
The previous studies of various functions of visual field now have been investigated. Those
visual fields were analyzed and classified into several functional fields such as: (1) Detection
and Perception, (2) Discrimination, (3) Recognition, (4) Performance/Behavior. A part of the
revised report was presented at the Division 1 meeting in Beijing, China. The work is ongoing
for a full report now.
R1-38 (V) Concept and Application of Equivalent Luminance: Y. Nakano JP
Year Established: 2005
Terms of Reference:
The reporter is to prepare a report addressing this topic.
Report:
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