明るさの知覚量と視知覚現象 1 : 不快グレア

概要

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The paper describes a inquiry of applicable regions of the auther's apparent brightness scales and some of the applications of the scales to the discomfort glare. The summary is as follows; 1. The apparent brightness scales are applicable to wide regions both of luminance and size of object. 2. An apparent brightness of the glare source which produces same degree of discomfort sensation is considered to be constant regardless to the eye adaptation levels, when the apparent size of source ω and the position index P are fixed. 3. A principal cause for the difference of the degree of discomfort due to size of glare source is considered to be a physiological or a psychological effect rather than brightness effect. 4. A "Discomfort Glare Chart" was derived. This chart shows the correlations between apparent brightness and discomfort glare for the eye adapted to 500 asb, and is applicable to the adaptation levels of 200〜500 asb within the 8% errors and of 100〜1000 asb within the 11.5% errors. 5. A glare formul a based to the apparent brightness was deduced, and the correlations between apparent brightness and each of those glare category, value of BCD index M and position index P are described.
社団法人日本建築学会の論文
1974-01-30