PROBLEM TO BE SOLVED: To solve the problem that photoacoustic waves of energy proportional to optical absorptance are not generated and measurement accuracy declines when the size of a heat generation part (photoacoustic wave generation part) is below the pulse length of the photoacoustic waves, in a spectroscopic measurement device which irradiates a specimen with the selected heating pulse light of a specific wavelength and measures the energy of the photoacoustic waves generated inside a living body.SOLUTION: A spectroscopic measurement device includes: a light source for generating pulse light to be radiated to a specimen an ultrasonic probe for receiving ultrasonic pulses generated inside the specimen and a signal processing part for calculating the generation part and intensity of the ultrasonic pulses generated inside the specimen on the basis of signals received in the ultrasonic probe. By irradiating the specimen with the pulse light before and after irradiating the specimen with light generated in the light source or a different light source, the density distribution of a desired component can be more highly accurately measured.COPYRIGHT: (C)2014,JPO&INPIT【課題】特定の波長の選択加熱パルス光を検体に照射し、生体内で生成した光音響波のエネルギーを計測する分光計測装置では、発熱箇所(光音響波生成箇所)のサイズが光音響波のパルス長を下回る場合、光吸収率に比例したエネルギーの光音響波が生成されず、計測精度が低下する。【解決手段】検体に照射するパルス光を生成する光源と、前記検体内で発生した超音波パルスを受信する超音波プローブと、前記超音波プローブにて受信した信号を元に、前記検体内部で生成した超音波パルスの発生箇所と強度を計算する信号処理部を備え、前記光源、または、別の光源にて生成した光を前記検体に照射する前後に、前記検体へのパルス光照射を行うことで、より高精度に所望の成分の濃度分布を計測することが可能となる。【選択図】図1
