PROBLEM TO BE SOLVED: To provide a technique which accurately measures sound pressure distribution in a lump by correcting variation in an element plane of a resonant wavelength in a Fabry-Perot type probe.SOLUTION: An acoustic wave acquisition apparatus comprises: an array light source which includes a plurality of elements emitting measurement light a control unit which controls the wavelength of the measurement light emitted from the array light source for one or the plurality of elements a Fabry-Perot type interferometer which includes a first mirror on which the measurement light is incident and a second mirror on which an acoustic wave from an analyte is incident an optical sensor which measures light quantity of reflection light formed by reflecting the measurement light with the first mirror and a processing unit which acquires the strength of the acoustic wave on the basis of the change in the light quantity of the reflection light generated by the change in a cavity length which is a distance between the first mirror and the second mirror due to the incidence of the acoustic wave on the second mirror.COPYRIGHT: (C)2014,JPO&INPIT【課題】ファブリーペロー型探触子において、共振波長の素子面内ばらつきを補正し、音圧分布を一括で正確に測定する技術を提供する。【解決手段】測定光を照射する複数の素子を含むアレイ光源と、アレイ光源から照射される測定光の波長を、1または複数の前記素子ごとに制御する制御部と、測定光が入射する第1のミラーと、被検体からの音響波が入射する第2のミラーとを含むファブリーペロー型干渉計と、第1のミラーにより測定光が反射した反射光の光量を測定する光センサと、音響波の第2のミラーへの入射によって第1のミラーと第2のミラーの間の距離であるキャビティー長が変化することで起きる、反射光の光量の変化に基づいて、音響波の強度を取得する処理部を有する音響波取得装置を用いる。【選択図】図1
