摘要
针对旋转对称椭球颗粒脉冲光声波的产生,推导沿其对称轴方向的波形的解析表达式.结果表明,无论是长椭球还是扁椭球颗粒,沿轴波形相对于球形颗粒所产生的N形波都有一定的形变,并且在近场条件下显示出能反映椭球颗粒形状与大小的明显特征.因此通过对脉冲光声波的测量和分析,能对旋转对称椭球颗粒进行形貌判定.
For photoacoustic wave production of an ellipsoid particle,we derive analytical formula for wave profile on symmetrical axis.It shows that either for a prolate ellipsoid particle or for an oblate ellipsoid particle,wave profile deviates from typical N wave for a sphere particle.Moreover,deviated N wave is found containing characteristic information about shape and size of the particle.It promises a method for investigating shape as well as size of ellipsoid particles by measuring pulsed photoacoustic wave.
出处
《计算物理》
CSCD
北大核心
2013年第3期409-414,共6页
Chinese Journal of Computational Physics
基金
国家自然科学基金(11074134)
教育部新世纪优秀人才支持计划(NCET-10-0502)资助项目
关键词
脉冲光声波
旋转对称椭球颗粒
光声成像
光声效应
pulsed photoacoustic wave
ellipsoid particle
photoacoustic imaging
photoacoustic effect
