diopter
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The amount of refractive power of a lens. It is expressed in diopters. Dioptrie is a German word. In English, it is called diopter. It is the reciprocal of the focal length in meters. It is positive for convex lenses and negative for concave lenses. Dividing 39 by the power of the glasses gives you the number in diopters. → Related items | Glasses Source : Heibonsha Encyclopedia About MyPedia Information |
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レンズの屈折度を表す量。Dで表示。Dioptrieはドイツ語。英語ではダイオプターdiopterという。焦点距離をメートルで表した数の逆数。凸レンズでは正，凹レンズでは負。39を眼鏡の度の数で割るとジオプトリーで表した数になる。 →関連項目度｜眼鏡 出典 株式会社平凡社百科事典マイペディアについて 情報 |
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