PROBLEM TO BE SOLVED: To generate a detection signal that reflects light passing through further more specific parts in a tissue under the nail.SOLUTION: A detection device includes: a light emission part for emitting light to a surface of a nail and a light receiving part for generating a detection signal in accordance with a light receiving level of light that has been emitted from the light emission part and passed through a tissue under the nail. An optical axis of the light emission part is inclined relative to a perpendicular passing through a center of gravity at a surface of the nail.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2019,JPO&INPIT【課題】爪の下の組織における特定の部位をより多く通過した光を反映した検出信号を生成する。【解決手段】爪の表面に対して光を出射するための発光部と、前記発光部から出射して前記爪の下の組織を通過した前記光の受光レベルに応じた検出信号を生成する受光部とを具備し、前記発光部の光軸は、前記爪の表面における重心を通る垂線に対して傾斜している検出装置。【選択図】図2
