https://scholars.lib.ntu.edu.tw/handle/123456789/302057
標題: | Determination of target depth in a turbid medium with polarization-dependent transmitted signals | 作者: | Sun, C.-W. Liu, K.-C. Wang, Y.-M. Wang, H.-H. Kiang, Y.-W. Liu, H.-K. CHIH-CHUNG YANG |
公開日期: | 2003 | 卷: | 20 | 期: | 11 | 起(迄)頁: | 2106-2112 | 來源出版物: | Journal of the Optical Society of America A: Optics and Image Science, and Vision | 摘要: | We demonstrate a novel method for target depth determination in a turbid medium with experiments and Monte Carlo simulations. This method relies on the strong; dependence of transmitted co-polarized intensity on target depth. Such a dependence originates from the inclusion of certain diffuse photons in the copolarized intensity. A target of stronger scattering located closer to the transmitter results in stronger photon divergence and hence weaker co-polarized intensity at the receiver of a finite aperture. On the other hand, the degree of polarization (DOP) carries only information about ballistic and snake photons. It is weakly dependent on the target depth. The DOP data can be used as a reference of absolute scattering strength in the turbid system. Our experimental and Monte Carlo simulation results show the feasibility of the proposed target depth determination method. Meanwhile, it is shown that an appropriate time-gating process could help in improving the accuracy of target depth. In addition, the results show that the proposed method has quite large applicable ranges of scattering coefficient and absorption coefficient. © 2003 Optical Society of America. |
URI: | http://www.scopus.com/inward/record.url?eid=2-s2.0-0242334661&partnerID=MN8TOARS http://scholars.lib.ntu.edu.tw/handle/123456789/302057 |
ISSN: | 10847529 | DOI: | 10.1364/JOSAA.20.002106 | SDG/關鍵字: | Computer simulation; Light absorption; Light scattering; Monte Carlo methods; Photons; Degree of polarization; Light polarization |
顯示於: | 電機工程學系 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。