晴天空光の分光分布と色度

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タイトル別名
  • Spectral Distributions of Clear Sky Light and Their Chromaticities
  • セイテンクウコウ ノ ブンコウ ブンプ ト シキド

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The spectral power distribution of clear sky light varies mainly from the following factors: density of aerosol, solar altitude and angular distance from the sun, and reflected light from ground surface. This paper investigates these factors and effects about variation of clear sky light. The spectral power distributions of clear skies are not measured but calculated theoretically.<BR>The following is found out:<BR>(1) The chromaticities of daylight in high latitudes are distributed up to the higher range of correlated color temperature (CCT) than in low latitudes and many chromaticities of daylight in low latitudes are distributed at the low range of CCT compared with in high latitudes.<BR>(2) The chromaticities of north sky light in low latitudes are distributed slightly to green side at high CCT and a little to purple side at low CCT compared with the chromaticities of north sky light in high latitudes.<BR>(3) The difference between the distributions of chromaticities of daylight falling on a horizontal surface in high latitudes and is low latitudes is much smaller than the difference between distributions of chromaticities of north sky light in high latitudes and in low latitudes.

収録刊行物

  • 照明学会誌

    照明学会誌 73 (2), 39-45, 1989

    一般社団法人 照明学会

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