...An instrument for recording the hours of sunshine. The Campbell sunshine meter, which has been used since ancient times, is an instrument that uses a glass bulb to create a focal point for sunlight, which leaves a burnt mark on a recording paper, and measures the hours of sunshine from the length of the burnt mark. The Jordan sunshine meter uses a piece of photosensitive paper placed inside a sealed cylinder, and determines the hours of sunshine from the light trail left by sunlight entering through two small holes in the cylinder. *Some of the terminology that refers to the Campbell sunshine meter is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…日照時間を記録する計器。古くから用いられているカンベル日照計は,ガラス球によって太陽光の焦点をつくり出し,これによって記録紙に焦げ跡ができるようにし,その長さから日照時間を測る測器である。ジョルダン式日照計は密封した円筒の中に感光紙をセットしておき,円筒につくられた2個の小さな穴から入射する太陽光によって描かれた光跡から日照時間を求めるものである。… ※「カンベル日照計」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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