PROBLEM TO BE SOLVED: To provide a subject information acquisition device capable of performing irradiation control for irradiation light after determining whether or not irradiation light that leaks from between a probe and a subject is of a safe level.SOLUTION: A subject information acquisition device includes: a first light source for generating first irradiation light which is the light a subject is irradiated with for generating an acoustic wave from the subject a second light source for generating second irradiation light the subject is irradiated with a first illumination optical system connected to the first light source for guiding the first irradiation light to the subject a second illumination optical system connected to the second light source for guiding the second irradiation light to the subject optical sensor means that includes an optical sensor and acquires a strength signal of the reflected light by the subject of the second irradiation light the subject is irradiated with and a control device for determining whether or not it is possible to emit the first irradiation light based on the strength signal of the reflected light detected by the optical sensor means. The second illumination optical system shares at least part of an optical member that the first illumination optical system uses.COPYRIGHT: (C)2014,JPO&INPIT【課題】プローブと被検体との間から漏れる照射光が、安全なレベルであるかを判定したうえで照射光の照射制御を行うことができる被検体情報取得装置を提供する。【解決手段】被検体に照射される光であって、被検体から音響波を発生させるための第一の照射光を発生させる第一の光源と、被検体に照射される第二の照射光を発生させる第二の光源と、第一の光源と接続され、前記第一の照射光を被検体に導く第一の照明光学系と、第二の光源と接続され、前記第二の照射光を被検体に導く第二の照明光学系と、光センサを含み、被検体に照射された前記第二の照射光の、前記被検体による反射光の強度信号を取得する光センサ手段と、前記光センサ手段が検出した反射光の強度信号に基づいて、前記第一の照射光の照射可否を決定する制御装置と、を有し、前記第二の照明光学系は、前記第一の照明光学系が使用する光学部材の少なくとも一部を共有する。【選択図】図1
