PROBLEM TO BE SOLVED: To provide a pulse detection method which is strong against a change of an imaging environment.SOLUTION: A biological information detection device includes: an imaging part for photographing reflection light from an object to output a video signal including a plurality of wavelength components； a reflection light analysis part for acquiring a wavelength and strength of the reflection light from the video signal； a wavelength fluctuation detection part for detecting a difference between the wavelength of the reflection light at each time and the wavelength of the reflection light at time before each time； and a pulse detection part for detecting a change corresponding to the time of the detected difference as a pulse.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】撮像環境の変化に強い脈拍の検出手法を提供する。【解決手段】対象物からの反射光を撮影して複数の波長の成分を含む映像信号を出力する撮像部と、前記映像信号から反射光の波長及び強度を取得する反射光解析部と、各時刻の反射光の波長と前記各時刻より前の時刻の反射光の波長との差分を検出する波長揺らぎ検出部と、前記検出された差分の時刻に応じた変化を脈拍として検出する脈拍検出部と、を有する生体情報検出装置。【選択図】図１
