The influence of the positive and negative defocusing on lensless ghost imaging

The influence of the positive and negative defocusing on lensless ghost imaging
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正负离焦对无透镜重影成像的影响

DOI:
10.1016/j.optcom.2016.07.023
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发表时间:
2017
影响因子:
2.4
通讯作者:
Fu Xiquan
Fu Xiquan
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Zeng Xue;Bai Yanfeng;Shi Xiaohui;Gao Yang;Fu Xiquan

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对完全空间非相干源无透镜鬼像进行了理论和实验研究。利用经典光学理论和完全空间非相干光源,研究了正、负离焦对无透镜鬼像成像的影响。数值计算和实验结果表明,与正离焦相比,负离焦对成像分辨率的影响更大。为了解释这一现象,给出了正散焦和负散焦情况下点扩散函数的解析表达式。
Lensless ghost imaging with fully spatially incoherent source is investigated theoretically and experimentally. The effects of positive and negative defocusing on lensless ghost imaging are studied by using classical optical theory and a fully spatially incoherent source. Based on the numerical calculation and experimental results, we find that the negative defocusing has a stronger influence on imaging resolution when compared with that from the positive defocusing. To explain this phenomenon, the analytical expression of point spread function with the positive and negative defocusing is presented.
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