PROBLEM TO BE SOLVED: To generate detection signals compensating differences among types of tissues where a plurality of paths different from each other is located in a measurement portion.SOLUTION: A detection device 50 generating a first detection signal and a second detection signal used for identifying biological information, comprises: a light emitting section E emitting coherent light to a measurement portion in a first period and a second period repeated on a time axis； a signal generation section 60 generating the first detection signal according to a light reception level of the coherent light being emitted in the first period from the light emitting section and passing through a first path in the measurement portion and the second detection signal according to a light reception level of the coherent light being emitted in the second period from the light emitting section and passing through a second path different from the first path in the measurement portion； an index calculation section 41 calculating indexes according to the number of red cells from the first detection signal and the second detection signal； and an adjustment section 43 adjusting time lengths of the periods concerning the first period and the second period and light emission intensity of the coherent light emitted such that the individual indexes are close to each other.SELECTED DRAWING: Figure 2【課題】相異なる複数の経路が測定部位内において位置する組織の、種類の違いを補償した検出信号を生成する。【解決手段】生体情報の特定に使用される第１検出信号と第２検出信号を生成する検出装置で、時間軸上で繰り返される第１期間と第２期間に測定部位にコヒーレント光を出射する発光部Ｅと、発光部から第１期間に出射して測定部位内にて第１経路を通過したコヒーレント光の受光レベルに応じた第１検出信号と、発光部から第２期間に出射して測定部位内にて第１経路とは異なる第２経路を通過したコヒーレント光の受光レベルに応じた第２検出信号とを生成する信号生成部６０と、第１検出信号と第２検出信号から赤血球数に応じた指標を算定する指標算定部４１と、各指標が相互に近づくように、第１期間および第２期間について、当該期間の時間長と、出射するコヒーレント光の発光強度とを調整する調整部４３とを具備する検出装置５０。【選択図】図２
