...If photographic film in general photography were only sensitive to blue light, black-and-white photographs would look unnatural, and color reproduction would be impossible. In 1873, German Hermann Wilhelm Vogel (1834-98) discovered that adding certain dyes to photographic emulsions would make them sensitive to longer wavelengths of light. In this way, the expansion of the range of color light to which an emulsion is sensitive is called spectral sensitization, and the discovery of spectral sensitization led to the production of orthophotographic plates and orthofilms that are sensitive to blue to yellow light, as well as panchromatic materials that are sensitive to the entire visible range. ... *Some of the terminology explanations that mention "Vogel, HW" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…一般写真撮影の場合に写真フィルムが青の光にしか感光しないならば,黒白写真においても不自然な感じの写真ができ,カラー写真の色再現は不可能になる。写真乳剤にある種の色素を加えると乳剤が長波長の光にも感光するようになることは,1873年ドイツのフォーゲルHermann Wilhelm Vogel(1834‐98)によって発見された。このようにして乳剤の感光する色光の領域を広げることを分光増感,あるいはスペクトル増感spectral sensitizationというが,分光増感の発見によって青から黄の色光に感ずるオルソ乾板,オルソフィルム,また可視域全般に感ずるパンクロ材料が製造されるようになった。… ※「Vogel,H.W.」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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