The organism optical measuring device of this invention through the optical fiber for lighting to the suffering inspection body, has specified wave length, responds to the oxidation hemoglobin and the restoration hemoglobin irradiate the light which through the optical lighting section and the optical fiber for detection which passes the aforementioned suffering inspection body the light which and detects it expands is detected with the optical sensing station and the aforementioned optical sensing station which calculates the information of hemoglobin time change of the oxidation hemoglobin and the restoration hemoglobin of the aforementioned suffering inspection internal and the entire hemoglobin from the signal which being the signal processing unit which, calculating processes the aforementioned detection signal by information of aforementioned time change, the aforementioned suffering inspection bodyWhether with the noise which originates in the obstacle for passing the light with the end faces of the optical fiber existing (low signal-to-noise ratio noise) is, or the noise which makes the damage of the aforementioned optical lighting section originating (mirror noise) it is the noise signal which it is decided & is detected by the signal processing unit and the aforementioned signal processing unit which possess the noise detection expedient which it decides & detects, type of noise it has the indicatory department which in identifiable is indicated.本発明の生体光計測装置は、被検体に照射用光ファイバを介して所定の波長を有し、酸化ヘモグロビン及び還元ヘモグロビンに感応する光を照射する光照射部と、検出用光ファイバを介して前記被検体を通過した光を検出し増幅する光検出部と、前記光検出部で検出した信号から前記被検体内の酸化ヘモグロビン及び還元ヘモグロビン並びに総ヘモグロビンのヘモグロビン時間変化情報を算出する信号処理部であって、前記検出信号を演算処理することにより前記時間変化情報が、前記被検体と光ファイバの端面との間に光の通過に対する障害物が存在することに起因するノイズ(低S/Nノイズ)であるか、前記光照射部の損傷を起因とするノイズ(ミラーノイズ)であるかを判定・検出するノイズ検出手段を有した信号処理部と、前記信号処理部によって判定・検出されたノイズ信号を、ノイズの種類を識別可能に表示する表示部を備えている。
