旋转对称椭球颗粒沿轴脉冲光声波波形的几何计算

计算物理 ›› 2013, Vol. 30 ›› Issue (3): 409-414.

旋转对称椭球颗粒沿轴脉冲光声波波形的几何计算

李勇, 方晖

南开大学现代光学研究所光学信息技术科学教育部重点实验室, 天津 300071

收稿日期:2012-09-06 修回日期:2012-12-11 出版日期:2013-05-25 发布日期:2013-05-25
作者简介:李勇(1980-),男,博士生,主要从事光声探测技术研究;E-mail:qq865704819@163.com
基金资助:
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

A Geometric Method for Photoacoustic Wave Profile on Symmetry Axis of an Ellipsoid Particle

LI Yong, FANG Hui

Institute of Modern Optics, Nankai University, Key Laboratory of Optical Information Technical Science, Mininstry of Education, Tianjin 300071, China

Received:2012-09-06 Revised:2012-12-11 Online:2013-05-25 Published:2013-05-25

摘要/Abstract

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.

关键词: 脉冲光声波, 旋转对称椭球颗粒, 光声成像, 光声效应

Abstract: 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.

Key words: pulsed photoacoustic wave, ellipsoid particle, photoacoustic imaging, photoacoustic effect

中图分类号:

O426.3

李勇, 方晖. 旋转对称椭球颗粒沿轴脉冲光声波波形的几何计算[J]. 计算物理, 2013, 30(3): 409-414.

LI Yong, FANG Hui. A Geometric Method for Photoacoustic Wave Profile on Symmetry Axis of an Ellipsoid Particle[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2013, 30(3): 409-414.