毛玻璃转速对热光鬼成像质量的影响  

The Influence of Rotational Speed of Ground-glass on the Quality of Ghost Imaging with Thermal Light

作　　者：王森[1] 李洪国[1] 张德建[1] 赵秋丽[1] 王海波[1] 熊俊[1] 汪凯戈[1] 

机构地区：[1]北京师范大学物理系应用光学北京市重点实验室,北京100875

出　　处：《量子光学学报》2015年第1期9-13,共5页Journal of Quantum Optics

基　　金：国家自然科学基金(11474027;11174038);国家863高技术项目(2013AA122902)

摘　　要：本文实验研究毛玻璃转速对鬼成像质量的影响。毛玻璃的转速增加使得散斑的涨落增快,这时散斑场的关联时间减少,到达CCD探测器的散斑场分布开始变得模糊,相当于探测器响应速度变慢,这时不同毛玻璃转速下关联图像的衬噪比基本不变。实验结果表明,当增加毛玻璃转速,即便这时候探测器获得的散斑场分布开始变得模糊,鬼成像的质量不会随之变化。In this paper, we experimentally studied how the rotational speed of ground-glass influences the quality of thermal ghost imaging. As the rotational speed of ground-glass increased,the dynamic speckles fluctuate faster, which reduced the coherence time of the speckle field,and the speckle pattern obtained by a CCD detector blurs. Yet, the contrast to noise ratio of the ghost image was virtually irrelevant to the rotational speed of ground-glass. Our experimental result showed that the quality of the ghost image did not degrade even when ground-glass rotates so fast that the blurred speckle pattern appears in CCD detector.

关 键 词：鬼成像 毛玻璃转速 散斑 衬噪比 

分 类 号：O431.2[机械工程—光学工程]