• Journal of Applied Optics
  • Vol. 43, Issue 6, 1145 (2022)
Shuchen DING1, Yunsheng QIAN1,*, Yanjian LIN2, and Huimin ZHAO2
Author Affiliations
  • 1School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
  • 2Nanjing Branch of North Night Vision Technology Co.,Ltd., Nanjing 211106, China
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    DOI: 10.5768/JAO202243.0604014 Cite this Article
    Shuchen DING, Yunsheng QIAN, Yanjian LIN, Huimin ZHAO. Halo-based black point detection method of microchannel plate[J]. Journal of Applied Optics, 2022, 43(6): 1145 Copy Citation Text show less
    Diagram of fluorescent screen scratches, dust and black spots of microchannel plate
    Fig. 1. Diagram of fluorescent screen scratches, dust and black spots of microchannel plate
    Diagram of circle extraction results by Sobel
    Fig. 2. Diagram of circle extraction results by Sobel
    Grey diagram and 3D diagram of LoG operator
    Fig. 3. Grey diagram and 3D diagram of LoG operator
    Diagram of detection results for LoG operator
    Fig. 4. Diagram of detection results for LoG operator
    Diagram of ring segmentation results
    Fig. 5. Diagram of ring segmentation results
    Diagram of halo detection results
    Fig. 6. Diagram of halo detection results
    Diagram of non-black spot halo detection results
    Fig. 7. Diagram of non-black spot halo detection results
    Schematic of MCP black spot detection system
    Fig. 8. Schematic of MCP black spot detection system
    Physical drawing of vacuum cavity
    Fig. 9. Physical drawing of vacuum cavity
    Diagram of black-spot detection results
    Fig. 10. Diagram of black-spot detection results
    Extraction diagram of black-spot halo under different voltages
    Fig. 11. Extraction diagram of black-spot halo under different voltages
    Results diagram of minimum circumscribed circle
    Fig. 12. Results diagram of minimum circumscribed circle
    检测方法检测时间/s圆心坐标半径
    Canny1.324(2 556,1 900)1 651
    Sobel0.433(2 556,1 902)1 651
    Prewitt0.728(2 556,1 902)1 652
    Roberts0.688(2 558,1 901)1 651
    Table 1. Detection results of each edge detection operator
    序号文献9方法Canny检测本文方法
    时间/ s数量T/F时间/ s数量T/F时间/ s数量T/F
    130.2736 186T9.800285F21.412133T
    232.5189 937T9.102286T22.230493T
    334.19012 093T9.161701T22.152277T
    429.7254 619T9.29678F21.74237T
    Table 2. Coarse detection results of three methods
    序号疵病类型半径/ μm机器检测结果人工检测结果序号疵病类型半径/μm机器检测结果人工检测结果
    1黑点96小黑点小黑点7正常0
    2正常08黑点160大黑点大黑点
    3黑点84小黑点小黑点9黑点125小黑点小黑点
    4黑点91小黑点小黑点10黑点96小黑点小黑点
    5黑点79小黑点小黑点11黑点136小黑点小黑点
    6正常012黑点124小黑点小黑点
    Table 3. Detection results of defects