Lensless Ghost Diffraction with Partially Coherent Sources: Effects of the Source Size, Transverse Coherence, Detector Size and Defocusing Length
Lensless Ghost Diffraction with Partially Coherent Sources: Effects of the Source Size, Transverse Coherence, Detector Size and Defocusing Length
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DOI：
10.1088/0256-307x/28/9/094203
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发表时间：
2011-08
影响因子：
3.5
通讯作者：
Jie Lin;Jing Cheng
中科院分区：
文献类型：
--
作者：
Jie Lin;Jing Cheng
对部分相干光源无透镜鬼衍射进行了理论和数值研究。基于经典光学相干理论和部分相干光源的高斯-壳模型，推导了无透镜鬼衍射（LGD）的解析成像公式。利用这个公式，我们可以看到光源的横向尺寸和相干性、探测器的尺寸和离焦长度对LGD质量的影响。数值计算结果表明，在不同的探测器尺寸和离焦长度下，采用合适的横向尺寸和相干宽度的光源可以实现高质量的LGD。这些结果可用于实际LGD系统设计中参数的选择。
Lensless ghost diffraction with partially coherent sources is investigated theoretically and numerically. Based on the classical optical coherent theory and the Gauss-Shell model of the partially coherent sources, we derive an analytical imaging formula of lensless ghost diffraction (LGD). Using this formula, we can see the effects of the transverse size and coherence of the sources, the detector size and defocusing length on the quality of LGD. Numerical results are presented to show that for different detector sizes and defocusing lengths, high quality LGD can be realized by using sources with appropriate transverse sizes and coherent widths. These findings can be used to choose the optimal parameters in the design of a realistic LGD system.