Tolerable Range of Illuminance of a Room to Yield Continuity Perception to Outside in Presence of Color Temperature Difference in the Two Spaces

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  • 色温度の差を考慮した室内から戸外を見た場合の連続感許容照度範囲
  • イロオンド ノ サ オ コウリョシタ シツナイ カラ コガイ オ ミタ バアイ

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Abstract

Continuity perception between two spaces can be obtained in general by adjusting the illuminance level of one of the spaces, when we say that the recognized visual spaces of illumination of the twospaces were made equal. This continuity can be experienced, for example, when an observer in a room looks outside through a window and the illuminance of the room is properly adjusted. There exists a range of illuminance within which continuity perception is assured. In the present experiment the range was measured when the color temperature of the room was systematically changed so that there were various differences in the color temperature between the room and the outside. The experiment was carried out during day time, and the weather outside varied greatly both during and between the experimental sessions. The results show that the range, when expressed in a specific form of outside illuminance and room illuminance, was constant regardless of the color temperature difference. The upper limits as well as the lower limits of the range slightly increased as the color temperature of the room became lower than that of the outside.

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