El-Halawany Ahmed, Beckus Andre, Kondakci H Esat, Monroe Morgan, Mohammadian Nafiseh, Atia George K, Abouraddy Ayman F
Opt Lett. 2017 Aug 15;42(16):3089-3092. doi: 10.1364/OL.42.003089.
The two-point complex coherence function constitutes a complete representation for scalar quasi-monochromatic optical fields. Exploiting dynamically reconfigurable slits implemented with a digital micromirror device, we report on measurements of the complex two-point coherence function for partially coherent light scattering from a "scene" composing one or two objects at different transverse and axial positions with respect to the source. Although the intensity shows no discernible shadows in the absence of a lens, numerically back-propagating the measured complex coherence function allows estimating the objects' sizes and locations and, thus, the reconstruction of the scene subject to the effects of occlusion and shadowing.
两点复相干函数构成了标量准单色光场的一种完整表示。利用数字微镜器件实现的动态可重构狭缝，我们报告了关于部分相干光从相对于光源处于不同横向和轴向位置的由一个或两个物体组成的“场景”散射的复两点相干函数的测量结果。尽管在没有透镜的情况下强度没有明显的阴影，但对测量得到的复相干函数进行数值反向传播可以估计物体的大小和位置，从而重建受遮挡和阴影影响的场景。
