DOI: 10.3724/SP.J.1249.2018.01035

Journal of Shenzhen University Science and Engineering (深圳大学学报理工版) 2018/35:1 PP.35-38

Automatic extraction and characteristic parameter analysis of electron beam moiré fringe

The intensity, angle, interval, and linewidth of the electron beam moiré fringe are important characteristic parameters for analyzing the imaging performance of the short magnetic-focused framing tube and exploring the method of improving the spatial resolution of the tube. In order to improve the efficiency of the extraction and parameter analysis of the moiré fringe, Butterworth's low-pass filter, threshold selection algorithm and region matching algorithm are integrated in the Matlab GUI window for fringe extraction and parameter analysis, which enables an intelligent batch processing. The experimental results show that the extraction time of the moiré fringe information is about 12 s, and the differences between the extraction results of the angle and interval of the moiré fringes and the corresponding manual operation results are only about 1.75% and 3.13%, respectively. This method can realize the batch processing of the fringe information, effectively improve the extraction of the electron beam moiré fringes and the efficiency of parameter analysis in mass information, and provide reliable data for studying the spatial resolution characteristic of the short magnetic-focused framing tube.

Key words:nuclear instrumentation,ultrafast diagnostic technique,short magnetic-focused framing tube,electron beam moiré fringe,Butterworth's pass filter,regional matching algorithm

ReleaseDate:2018-03-20 15:26:55

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