Application of diffraction tomography theory to determine size and shape of spheroidal particles from light scattering

作者：Ding, Chizhu; Yang, Kecheng; Li, Wei^*; Guo, Wenping; Zhang, Xiaohui; Xia, Min

来源：Optics and Laser Technology, 2014, 62: 135-140.

DOI：10.1016/j.optlastec.2014.03.003

• Scattering
• Inverse scattering
• Tomography

Discerning the geometry of spheroidal scatterers of micron order is an important topic in identifying marine microbes. Optical diffraction tomography theory indicates that under the first-order Born approximation for weak scattering, scattering amplitude in the far zone and scattering potential of the scatterer have a Fourier relationship. In this paper, we describe a method based on diffraction tomography theory and determine the size and the shape of spheroidal scatterers by reconstructing the distribution of scattering potential from angular resolved scattered field. As a demonstration of this method, the scattering from spheroidal particles with equal-volume-sphere radii of 0.5429, 1.00, and 2.00 mu m and an aspect ratio that varies from 0.4 to 1.5 was modeled by using 1-matrix theory and used as test data. Simulation results show that in the case of low contrast, size and shape determination can be achieved with sub-wavelength precision.

• 出版日期2014-10
• 单位华中科技大学; 中国人民解放军海军工程大学