Author Affiliations
Abstract
1 Department of Physics, College of Liberal Arts and Science, National University of Defense Technology, Changsha 410073, China
2 Interdisciplinary Center of Quantum Information, National University of Defense Technology, Changsha 410073, China
Applications of ghost imaging are limited by the requirement on a large number of samplings. Based on the observation that the edge area contains more information thus requiring a larger number of samplings, we propose a feedback ghost imaging strategy to reduce the number of required samplings. The field of view is gradually concentrated onto the edge area, with the size of illumination speckles getting smaller. Experimentally, images of high quality and resolution are successfully reconstructed with much fewer samplings and linear algorithm.
computational ghost imaging adaptive imaging Chinese Optics Letters
2021, 19(4): 041102
1 国防科学技术大学光电科学与工程学院, 湖南 长沙 410073
2 国防科学技术大学理学院, 湖南 长沙 410073
在关联成像中，赝热光源的特性对成像质量至关重要。赝热光源的关联特性和关联成像的对比度、信噪比和分辨率密切相关。在其他条件相同的情况下，二阶关联峰值越高，所成关联像的对比度越高，而赝热光源的随机性越好，则成像的信噪比越高。赝热光源的产生有很多方案，近来出现的基于空间光调制器的赝热光源由于其相位可预置性而具有很好的应用前景。本文介绍了利用空间光调制器调相、调幅等不同调制方法产生赝热光源的原理，并通过模拟对比了施加不同的振幅、相位及其混合调制所引起的赝热光源的二阶关联峰值的差异性，对比发现当振幅分布为瑞利分布、相位分布为0～2π 均匀分布时，赝热光关联峰值理论可以达到2，此时赝热光源的特性较为理想。
成像系统 赝热光 空间光调制器 关联成像 调制 散斑 激光与光电子学进展
2014, 51(4): 041101
