• Frontiers of Optoelectronics
  • Vol. 12, Issue 2, 174–179 (2019)
Kuanhong XU, Xiaonong ZHU*, Peng HUANG, Zhiqiang Yu, and Nan ZHANG
Author Affiliations
  • Institute of Modern Optics, Nankai University, Tianjin 300350, China
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    A peculiar and regular diffraction pattern is recorded while using either a color or a monochrome charge-coupled device (CCD) camera to capture the image of the micro air plasma produced by femtosecond laser pulses. The diffraction pattern strongly disturbs the observation of the air plasma, so the origin and eliminating method of these diffraction patterns must be investigated. It is found that the Fourier transform of the periodic surface structure of either the mask mosaic of the color CCD or the pixel array of the monochrome CCD is responsible for the formation of the observed pattern. The residual surface reflection from the protection window of a CCD camera plays the essential role in forming the interesting twodimensional diffraction spots on the same CCD sensor. Both experimental data and theoretical analyses confirm our understanding of this phenomenon. Therefore removing the protection window of the CCD camera can eliminate these diffraction patterns.
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    Kuanhong XU, Xiaonong ZHU, Peng HUANG, Zhiqiang Yu, Nan ZHANG. Origin of peculiar inerratic diffraction patterns recorded by charge-coupled device cameras[J]. Frontiers of Optoelectronics, 2019, 12(2): 174
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    Received: Apr. 20, 2018
    Accepted: Jul. 24, 2018
    Posted: Feb. 1, 2019
    Published Online: Nov. 14, 2019
    The Author Email: ZHU Xiaonong (xnzhu1@nankai.edu.cn)