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.