斑点图案
光学
相位恢复
菲涅耳衍射
衍射
相干衍射成像
散斑噪声
振幅
调制(音乐)
相位调制
相(物质)
计算机科学
噪音(视频)
相位噪声
材料科学
物理
人工智能
图像(数学)
声学
傅里叶变换
量子力学
作者
Lei Xie,Kunpeng Liu,Zhigang Liu,Jinsong Guo
出处
期刊:Optics Express
[Optica Publishing Group]
日期:2023-05-22
卷期号:31 (12): 18824-18824
被引量:1
摘要
Traditional methods of coherent diffraction imaging using random masks result in an insufficient difference between the diffraction patterns, making it challenging to form a strong amplitude constraint, causing significant speckle noise in the measurement results. Hence, this study proposes an optimized mask design method combining random and Fresnel masks. Increasing the difference between diffraction intensity patterns enhances the amplitude constraint, suppresses the speckle noise effectively, and improves the phase recovery accuracy. The numerical distribution of the modulation masks is optimized by adjusting the combination ratio of the two mask modes. The simulation and physical experiments show that the reconstruction results of PSNR and SSIM using the proposed method are higher than those using random masks, and the speckle noises are effectively reduced.
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