全息术
光学
空间频率
振幅
空间滤波器
噪音(视频)
图像质量
计算机科学
物理
相(物质)
图像(数学)
人工智能
量子力学
作者
Xiaomeng Sui,Zongling He,Guofan Jin,Daping Chu,Liangcai Cao
出处
期刊:Optics Express
[The Optical Society]
日期:2021-01-14
卷期号:29 (2): 2597-2597
被引量:46
摘要
Herein, we propose a band-limited double-phase method to improve the quality of reconstructed images encoded by double-phase holograms (DPHs) derived from complex-amplitude light waves. Although the quality of images produced by DPHs was improved compared to that of conventional holographic images, it still suffered from degradation because of the spatial shifting noise generated during the conversion from complex-amplitude holograms to phase-only holograms. The proposed method overcomes this shortcoming by defining a band-limiting function according to the spatial distribution of DPHs in the frequency domain to remove the specific spatial frequency components severely affected by the spatial shifting of DPHs. The sharpness of images reconstructed from band-limited DPHs with appropriate optical filtering showed an improvement of 36.84% in simulations and 51.67% in experiments evaluated by 10-90% intensity variation.
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