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arXiv 1608.00640physics.optics
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通过散斑laser照明的空间亚瑞利成像分析

Spatial sub-Rayleigh imaging analysis via speckle laser illumination

Yunlong Wang, Feiran Wang, Ruifeng Liu, Dongxu Chen, Hong Gao, Pei Zhang, Fuli Li

摘要:

光学亚瑞利成像在许多领域具有潜在的应用价值。在这封信中,通过限制光场的发散度,以及照明源的大小,我们表明,通过散斑激光照明的一阶平均强度测量可以实际突破瑞利极限。对于高阶算法,据报道,可以利用自相关函数来实现亚瑞利特征。然而,我们发现高阶算法的这种子瑞利特征仅限于二值物体,并且当放置灰色物体时图像会失真。这一特性促使我们去寻找高阶相关成像算法背后的物理机制。我们在这封信中解决这些解释,并发现对于不同类型的高阶算法,总有一个座位在正确的地方从交叉关联函数。

英文摘要:

It is commonly accepted that optical sub-Rayleigh imaging has potential application in many fields. In this Letter, by confining the divergence of the optical field, as well as the size of the illumination source, we show that the first-order averaged intensity measurement via speckle laser illumina- tion can make an actual breakthrough on the Rayleigh limit. For a high-order algorithm, it has been reported that the autocorrelation function can be utilized to achieve the sub-Rayleigh feature. However, we find that this sub- Rayleigh feature for the high-order algorithm is limited only to binary objects, and the image will be distorted when a gray object is placed. This property encourages us to find the physics behind the high-order correlation imaging algo- rithm. We address these explanations in this Letter and find that for different types of high-order algorithm, there is always a seat in the right place from the cross-correlation function.

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