七十年代以来,一门以光声效应为基础的光声检测技术得到了迅速发展, 正在形成一门新的光声学学科,光声效应是物质吸收了调制光能而产生声信号的一种由光能转变成热能、由热能转变成声能的一种效应,它早在1880年就为美国著名科学家A.G.贝尔发现[1]。然而,随着近年来激光技术,弱 Since the 1970s, a photoacoustic detection technology based on the photoacoustic effect has been rapidly developed, and a new photoacoustic discipline is being formed. Photoacoustic effect is a kind of sound signal generated by a substance that absorbs modulated light energy From light energy to heat energy, from the thermal energy into an effect of sound energy, as early as in 1880 for the United States famous scientist AG Bell discovered [1]. However, with the recent laser technology, weak