PROBLEM TO BE SOLVED: To provide a technique for measuring the two-dimensional distribution of reflected light quantity of measurement light in the optimum wavelength by a Fabry-Perot type probe using an array type optical sensor.SOLUTION: An acoustic signal receiver to be used includes: a wavelength-variable light source for emitting measurement light a control section for controlling the wavelength of the measurement light a Fabry-Perot type probe including a first mirror on the side receiving the incident measurement light, a second mirror of the side receiving an elastic wave incident from a subject and a spacer film formed between the first and second mirrors and deformable depending on incident of the elastic wave an array type optical sensor for detecting the reflected light quantity of the measurement light caused by the Fabry-Perot type probe and a signal processing section for acquiring the strength of the incident elastic wave on the basis of a change in reflected light quantity due to the deformation of the spacer film. The control section sweeps the wavelength of the measurement light, and the signal processing section acquires the wavelength of the measurement light to be used based on the reflected light quantity in each swept wavelength.COPYRIGHT: (C)2013,JPO&INPIT【課題】アレイ型光センサを用いたファブリーペロー型探触子により、最適波長における測定光の反射光量の二次元分布を測定するための技術を提供する。【解決手段】測定光を照射する波長可変光源と、測定光の波長を制御する制御部と、測定光が入射する側の第1のミラー、被検体からの弾性波が入射する側の第2のミラー、第1と第2のミラーの間にあり弾性波の入射に応じて変形するスペーサー膜を含むファブリーペロー型探触子と、ファブリーペロー型探触子による測定光の反射光量を検出するアレイ型光センサと、スペーサー膜の変形による反射光量の変化より、入射した弾性波の強度を取得する信号処理部を有し、制御部は測定光の波長を掃引し、信号処理部は掃引した各波長における反射光量に基づいて用いる測定光の波長を求める音響信号受信装置を用いる。【選択図】図6
