光の到来バランスを考慮した空間の明るさ感の評価

概要

論文の詳細を見る
When we stay in a space, we are surrounded by light coming from all directions. The brightness of the wall surface is different from the brightness of a space. The condition of light that surrounds a person is necessary to evaluate brightness of a space. Therefore new evaluation methods which replace the two-dimensional evaluation are necessary. Then, we examined how we had felt the brightness of a 3-dimentional space. First, we have examined the basic relationship between arrival direction of the light and brightness by using the full-scale model. The results are as follows : 1) Brightness changed due to the subject's action, even if the condition of the light was absolutely the same. 2) The light from horizontal direction is more effective for brightness. 3) Brightness changed due to the balance of arrival direction of the light, even if the total amount of the light is same. Next, the measurement tool for obtaining data of the light that comes from all directions was developed. We examined two effects of "quantity of the light" and "the spatial balance of the light" on the brightness of the space using got value from the tool. As a result, we discovered that former can be explained at the value which horizontally integrated 360° in the weighting of (1+cosθ)/2 and latter can be explained at the angle of visibility and directional diffusivity.
社団法人日本建築学会の論文
2003-06-30