Lewis G D, Jordan D L, Roberts P J
Defence Evaluation and Research Agency, St. Andrews Road, Malvern WR14 3PS, UK.
Appl Opt. 1999 Jun 20;38(18):3937-44. doi: 10.1364/ao.38.003937.
We describe a method for increasing target contrast within a turbid medium by means of the polarization state of the scattered light. The backscattered Mueller matrices for various concentrations of 0.1-microm spherical scatterers were measured with and without a painted metal target. Simple discrimination based on detecting cross-polarized intensities is shown to be more effective than the use of total intensity information. As a result, the choice of polarization state is dictated primarily by the requirement to maximize depolarization at the target. This in general means that circularly polarized light is the optimum choice.
我们描述了一种通过散射光的偏振态来提高混浊介质中目标对比度的方法。测量了有无涂漆金属目标时不同浓度的0.1微米球形散射体的后向散射穆勒矩阵。结果表明，基于检测交叉偏振强度的简单判别比使用总强度信息更有效。因此，偏振态的选择主要取决于使目标处的去极化最大化的要求。一般来说，这意味着圆偏振光是最佳选择。
