Orthofilm - Orsofilm

Japanese: オルソフィルム - おるそふぃるむ
Orthofilm - Orsofilm

... The silver halide used as a photosensitive material is only sensitive to short wavelength light below blue light, but by adsorbing a sensitizing dye to the silver halide, it can be made sensitive to green to yellow light, red light, and even infrared light. Photosensitive materials that are sensitive to light in the near ultraviolet to yellow wavelength range are called orthochromatic, or simply ortho, and such films are called orthochromatic films. Films that are sensitive to even red light are called panchromatic, and such films are called panchromatic films.

*Some of the terminology that refers to "orthofilm" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

… 感光物質として用いられているハロゲン化銀単独の感光波長域は,青色光以下の短波長光にしかないが,増感色素をハロゲン化銀に吸着させて用いることにより,緑色光~黄色光,赤色光,さらには赤外線にも感ずるようにされている。感光材料が近紫外部から黄色の波長範囲の光に対して感度をもつことをオルソクロマティックorthochromatic,または単にオルソといい,そのようなフィルムをオルソフィルムorthochromatic filmと呼ぶ。さらに赤色光まで感度をもつことをパンクロマティックといい,そのようなフィルムをパンクロフィルムpanchromatic filmという。…

※「オルソフィルム」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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>>:  Orthochromatic

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