黒板専用照明の開発研究

概要

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For the enough presentation of the objects demonstrated on the blackboard, it is necessary to be lighted by a lamp at the top of the blackboard. This idea is a motive for beginning this study. Technical materials concerning lighting for blackboard are not always wealthy. According to some recommendation, the aim should be realized that average illuminance is over 350 lux and the uniformity of illimmance is over 0.3 on the blackboard. Board lighting at the respective classroom of our school was investigated. The lighting feature relating to Place of the classroom was cleared and it was concluded tht illuminance of the new classroom had been higher than that of the old one. Illuminance on the board at any classroom satisfied the values of recommendation. As a result of estimation by calcuration for lighting of blackboard, it was expected to obtain a desirable illuminance distribution of uniformity 0.36 on the board by 40 W reflector type fluorescent lamp with three flat mirrors. But its experimental inspection remained for future study.
東京工芸大学の論文