Making optical low-pass spatial filters by thin-film phase grating

Sheng Hui Chen, Yong Tong Zou, Cheng Chung Lee

研究成果: 雜誌貢獻期刊論文同行評審

1 引文 斯高帕斯(Scopus)


A modified rule was applied to design a grating optical low-pass spatial filter (GOLF) with a thin-film phase grating. This filter differed from the crystal type of optical low-pass spatial filter (OLPF). The fabrication method of the thin-film phase GOLF was also different from the conventional lithographic process. A new fabrication method utilizing a metal mesh mask and a thin-film coating process was applied to make the GOLF. The process had the advantages of being simple and cheap, and would thus be good for mass-production. The modulation transfer function (MTF) of the device was measured and the results agree well with the theoretical calculations. Finally, the GOLF was installed on a digital camera which was used to capture images of the circular zone plane (CZP), to show the Moiré pattern suppression ability.

頁(從 - 到)2215-2224
期刊Journal of Modern Optics
出版狀態已出版 - 15 10月 2006


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