Xiao Xiang, Sun Shuai, Lin Hui-Zu, Jiang Liang, Liu Wei-Tao
Opt Express. 2019 Sep 30;27(20):28457-28465. doi: 10.1364/OE.27.028457.
Ghost imaging is developed to obtain images of the objects based on intensity correlation of illumination patterns. However, it can be hard to distinguish between objects if the difference between their reflectivities is small. Considering the difference between degrees of polarization in the reflected light from different points, we put forward a method to retrieve distribution of the degree of linear polarization, and obtain high quality image of the objects. With the illumination source being linearly polarized, two orthogonal polarization components of the reflected intensities are measured, from which we can get the distribution of the degree of linear polarization. Furthermore, for the case that the degree of linear polarization can be approximately described with two different values within the field of view, we demonstrate retrieving of the image with high contrast. Our method can be widely applied in different situations, such as extracting the image of target hidden behind disguise or getting higher contrast in bio-imaging.
鬼成像技术旨在基于照明模式的强度相关性来获取物体的图像。然而，如果物体反射率之间的差异很小，就很难区分它们。考虑到来自不同点的反射光中偏振度的差异，我们提出了一种方法来检索线性偏振度的分布，并获得物体的高质量图像。在照明源为线偏振的情况下，测量反射强度的两个正交偏振分量，从中我们可以得到线性偏振度的分布。此外，对于在视场内线性偏振度可以用两个不同值近似描述的情况，我们展示了高对比度图像的检索。我们的方法可以广泛应用于不同的场景，例如提取隐藏在伪装后面的目标图像或在生物成像中获得更高的对比度。
