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The objective of this study is to investigate the effect of the size of glare source on the Position Index. The Guth Position Index has an issue that it is not defined for the glare sources having var...ious sizes but for the glare source of 0.0011sr. It should be probed that the Guth Position Index is still valid for smaller or larger glare sources. Experiments were conducted using a Glare Testing Instmment made for this study. The experiments consisted of two kinds of test. One was carried out to assess discomfort glare from glare sources of 0.00018sr, 0.00072sr, 0.0029sr and 0.012sr under various adaptation conditions. Luminance for discomfort glare was measured at six positions along the horizontal line in the visual field of the right eye. The other test was carried out to investigate the difference in the sensitivity to glare between seeing by the two eyes and by one eye. The results show that the position index hardly varies for the size of glare source and the background luminance. And there is little difference in the sensitivity to glare between seeing by the two eyes and by one eye.続きを見る
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Mendeley出力
jaud005_p093