基于反射型物体的高阶非相干热光源关联成像性能研究

现有基于热光源的关联成像主要是针对透射型物体，这样可简化关联成像分析过程。然而对于成像的实际应用，比如遥感技术，反射型物体将具有更大的实用价值。基于非相干均亮的热光源，对反射型物体的高阶关联成像进行了研究，推导出其高阶反射关联成像的关联函数、可见度及信噪比的解析式；对比二阶反射关联成像，讨论阶数对关联成像性能的影响。研究结果表明，对于反射型物体的关联成像，随着阶数的增加，成像的可见度得到提高，但信噪比下降，同时能够通过增加测量次数增加成像的信噪比。

Study on High-Order Reflective Ghost Imaging with Incoherent Thermal Light

Most ghost imaging experiments and theories have addressed the transmissive object, which simplifies the procedure of imaging analysis. However, reflective ghost imaging is more valuable in application, such as in the remote sensing technology. The high-order reflective ghost imaging with an incoherent, uniformly bright thermal light is studied. The expressions of the cross-correlation function, image visibility, and signal-to-noise ratio for the high-order reflective ghost imaging is presented. Compared with the results of the second-order reflective ghost imaging, the effect of the order number on the performance of high-order reflective ghost imaging is discussed. The results show that the visibility of high-order reflective ghost imaging is enhanced while the signal-to-noise ratio decreases with the bigger order. And the signal-to-noise ratio can be improved by increasing the measurements in implementation.