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非均匀光强分布的反射式水下量子成像研究

Study on NonuniformIntensity of Pseudo ThermalLight Source in Reflective Underwater Ghost Imaging

项青  
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摘要

在量子成像中,光源散斑强度的独立性与随机性影响了图像重建的质量,现用的赝热光源是由高斯分布的激光束调制而成。针对反射式量子成像技术中赝热光源的传输特性,结合水体散射理论,研究了重建图像的均方误差与光源光斑强度分布和光斑尺寸的关系,以及对常用的图像重建算法成像质量的影响,针对光强分布不均提出加权平均归一化算法。仿真结果显示,光斑强度分布越均匀成像质量越高,加权平均归一化算法能减小光强分布不均对成像质量的影响。所得结果有助于数字微镜空间光调制器的赝热光源反射式水下量子成像系统中对光源的优化和成像质量的提升。

Abstract

The quality of ghost imaging relies on the independency and randomicity of light source. Existing pseudo thermal light is modulated laser which obeys Gaussian distribution. Considering underwater optical properties, in allusion to the pseudo thermal light in ghost imaging, The influence of light intensity distributing on the mean square error of the image rebuilding and image quality is studied. Aiming at the problem of nonuniform intensity, the weighted average normalization method is put forward. The results show that the more uniform the light intensity is, the higher the image quality is. Weighted average normalization method can enhance the image quality by weakening the effect of nonuniform intensity. This result is helpful to optimize the system of pseudo thermal light source in reflective underwater ghost imaging and promote image quality.

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中图分类号:O431.2

所属栏目:激光技术与应用

收稿日期:2017-06-13

修改稿日期:2017-09-19

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作者单位    点击查看

项青:华中光电技术研究所—武汉光电国家实验室, 湖北 武汉 430223

联系人作者:项青(dtcxq1234@sina.com)

备注:项青(1990-),女,硕士,助理工程师,主要从事激光技术方面的研究工作。

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引用该论文

XIANG Qing. Study on NonuniformIntensity of Pseudo ThermalLight Source in Reflective Underwater Ghost Imaging[J]. OPTICS & OPTOELECTRONIC TECHNOLOGY, 2017, 15(6): 19-23

项青. 非均匀光强分布的反射式水下量子成像研究[J]. 光学与光电技术, 2017, 15(6): 19-23

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