PROBLEM TO BE SOLVED: To provide a photoacoustic measuring device which controls light quantity by an illumination means generated depending on differences of measurement positions so that the light quantity is optimal and enables highly accurate measurement.SOLUTION: The photoacoustic measuring device includes: a holding means for holding an object to be measured the illumination means for irradiating light from a pulse light source to the object to be measured via the holding means and an ultrasound wave detection means for detecting ultrasound waves by light entering the object to be measured from the illumination means as an photoacoustic signal. Moreover, the photoacoustic measuring device has a light quantity adjustment means for adjusting the light quantity based on a mechanical change in the holding means, the illumination means and the ultrasound wave detection means.COPYRIGHT: (C)2013,JPO&INPIT【課題】測定位置の違いによって発生する照明手段による光量を最適になるように制御することができ、高精度の計測が可能となる光音響計測装置を提供する。【解決手段】被測定物を保持する保持手段と、パルス光源からの光を前記保持手段を介して前記被測定物に照明する照明手段と、前記照明手段から被測定物に入射した光による超音波を光音響信号として検出する超音波検出手段と、を備えた光音響計測装置であって、前記保持手段、前記照明手段あるいは前記超音波検出手段における機械的な変化に基づいて光量を調整する光量調整手段と、を有する構成とする。【選択図】 図1
