PROBLEM TO BE SOLVED: To provide a technique capable of changing resolution or an imaging area during imaging, in an acoustic wave acquiring apparatus using a Fabry-Perot probe.SOLUTION: An acoustic wave acquiring apparatus includes: a measurement light source for emitting measurement light a probe having a Fabry-Perot interferometer including a first mirror on a side of which the measurement light is incident, and a second mirror on a side of which an elastic wave from an object is incident an optical system for changing a beam diameter of the measurement light a controller for controlling change in the beam diameter performed by the optical system an optical sensor for measuring a light intensity of the measurement light reflected on the Fabry-Perot interferometer and a processor for acquiring intensity of the elastic wave based on change in the light intensity measured by the photosensor due to incidence of the elastic wave.COPYRIGHT: (C)2013,JPO&INPIT【課題】ファブリーペロー型探触子を用いた音響波取得装置において、撮像中に分解能や撮像領域を変えることを可能にする技術を提供する。【解決手段】測定光を照射する測定光源と、測定光が入射する側の第1のミラーおよび被検体からの弾性波が入射する側の第2のミラーを含むファブリーペロー型干渉計を有する探触子と、測定光のビーム径を変化させる光学系と、光学系によるビーム径の変化を制御する制御部と、ファブリーペロー型干渉計で反射した測定光の光量を測定する光センサと、弾性波の入射による、光センサが測定した光量の変化に基づいて、弾性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
