移動物体の視認性における後方発光面の輝度の影響

• 瀬川 かおり

  横浜国立大学

• 東 洋邦

  東芝ライテック(株)

• 岡嶋 克典

  横浜国立大学

書誌事項

タイトル別名

• Effects of Luminance of Light Source Illuminating from Behind on the Visibility of a Moving Object
• イドウブツタイ ノ シニンセイ ニ オケル コウホウ ハッコウメン ノ キド ノ エイキョウ

抄録

LED lighting sources have become widely used in various illumination settings. The purpose of our study is to clarify the effect of luminance level of LED light sources on the visibility of a moving ball. The light was falling on the observers’ fovea and 5 luminance levels from 1^＊10⁴ to 30^＊10⁴ cd/m² were prepared. The ball size was 0.16 or 0.25 deg in visual angle. Observers pursued a falling ball in front of the light source, then responded by a two-alternative forced choice (2 AFC) method whether they could detect the ball or not. In addition, observers responded whether they could see the falling ball in whole or partially on the light source, and the apparent size of the ball if observers could detect a ball. The results showed that the probabilities of disappearance increase with luminance levels, and that the probability of disappearance for smaller balls is higher. Balls more frequently appeared partially and smaller with increasing luminance levels. We derived psychometric equations for the probability of the ball-disappearance phenomena as a function of luminance of light source, suggesting that the luminance threshold is around 30^＊10⁴ cd/m².

収録刊行物

• 照明学会誌

  照明学会誌 101 (6), 229-233, 2017

  一般社団法人 照明学会

キーワード

• visibility
• disability glare
• moving object
• luminance
• light source

詳細情報

• CRID: 1390282679064543872
• NII論文ID: 130006038405
• NII書誌ID: AN00268860
• DOI: 10.2150/jieij.101.229
• ISSN: 1349838X
• ISSN: 21851506
• ISSN: 00192341
• NDL書誌ID: 028302156
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I028302156
• Web Site: https://www.jstage.jst.go.jp/article/jieij/101/6/101_229/_pdf
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可