Results 201 to 210 of about 19,687 (248)

Discomfort Glare and the Lighting of Buildings

Transactions of the Illuminating Engineering Society, 1950
Bright light sources can cause glaring effects which may impair visual efficiency. This may be brought about by a directly disabling effect, or it may result indirectly from irritation and discomfort. The purpose of the work described in the paper was to obtain more detailed knowledge of the effects of glaring light sources on ...
P. Petherbridge, R. G. Hopkinson
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Discomfort glare measurement

SPIE Proceedings, 2009
In the paper some results of research on discomfort glare measurement are described. The idea of practical realization of this measurement in interiors on the basis of the analysis of the investigated room image is presented. To obtain the necessary geometric quantities the coordinates of proper pixels in the image and some parameters of the imaging ...
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Overhead Glare and Visual Discomfort

Journal of the Illuminating Engineering Society, 2003
(2003). Overhead Glare and Visual Discomfort. Journal of the Illuminating Engineering Society: Vol. 32, No. 1, pp. 73-88.
Peter R. Boyce, Claudia M. Hunter, Carlos Inclan   +2 more
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The Pupillary Response and Discomfort Glare

Journal of the Illuminating Engineering Society, 1975
This IERI report is a four-part study on pupillary fluctuations as an index of discomfort glare. Light reduces the size of the pupil, but it is not size alone that generates discomfort. Rather, it is the fluctuation in size. Here, the authors present new studies of the role of the iris in generating what is known as discomfort glare.
Glenn A. Fry, Vincent M. King
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Discomfort Glare: Range Effects

Journal of the Illuminating Engineering Society, 1981
Forty paid observers made adjustments to the borderline between comfort and discomfort (BCD). A random half of the observers adjusted a glare source with a maximum luminance of 300,000 fL, the other half a glare source with a maximum luminance of 30,000 fL. The mean BCD in the first case was 26,900 fL, in the other it was 3,860 fL.
Ashok B. Lulla, Corwin A. Bennett
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A portable discomfort glare evaluator

Lighting Research & Technology, 1980
An inexpensive portable instrument is described for the paired comparison observation of direct discomfort glare in interior lighting installations. It is useful for field tests where it complements glare assessment by verbal statements.
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Discomfort Glare and Visual Performance

Transactions of the Illuminating Engineering Society, 1968
An experimental study was carried out to determine whether glare which had been scaled for discomfort would produce a decrement in visual performance. Three levels of glare and a no glare condition based on the IES glare index classification were established in a carefully controlled visual environment.
P. T. Stone, S. D. P. Groves
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A Simplified Formula for Discomfort Glare

Journal of the Illuminating Engineering Society, 1976
The method covered in this article is the basis for criteria established by RQQ Report No. 3, “An alternate simplified method for determining the acceptability of a luminaire from the VCP standpoint for use in large rooms.” The basic equation used in this method to assess discomfort glare is known as the “Guth formula.” Here, the author's purpose is to
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Unified Glare Rating (UGR) and subjective appraisal of discomfort glare

Lighting Research and Technology, 1996
The study investigated the correlation between the subjective glare rating and the Unified Glare Rating (UGR). Experiments and analyses were carried out. The results showed that there was a good correlation between the subjective glare rating and the UGR glare indices, but that the subjective glare ratings were always a few units lower than the UGR ...
Y. Akashi, R. Muramatsu, S. Kanaya
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Discomfort Glare Comparison for Various LED Cap Lamps

IEEE Transactions on Industry Applications, 2010
Researchers at the National Institute for Occupa- tional Safety and Health (NIOSH) are investigating different light- ing technologies with the objective of improving mine safety. This paper presents the results from an ongoing study that compares discomfort glare for different light-emitting diode (LED) cap lamps using the de Boer glare rating scale ...
John J. Sammarco, Alan G. Mayton, Timothy Lutz, Sean Gallagher   +3 more
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