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电子扫描成像的MATLAB图形演示

Analysis of Scanning Principle and Demonstration by Software of MATLAB
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摘要 李萨如图形是演示垂直振动合成的重要内容。通过研究不同频率垂直电场作用下,电子的复杂运动轨迹,给出电子运动轨迹的详细计算公式,借助MATLAB软件进行信号模拟,逼真地再现实验室所见的李萨如图形。理论及模拟图像与实验结果完全一致。模拟结果避免了实验时的信号杂散干扰。通过改变垂直电场的频率,还可以获得任选的合成图像。与实验相比,模拟显示效果更加理想,对于加深师生对电子显示原理的认识,很有价值。 The concept of a Lissajous figure is an important content showing the perpendicular vibration synthesis. By the study about the complicate track of the electronics under a perpendicular electric field of different frequency, we obtain the detailed formulas of the track of the electronics. With the help of MATLAB software to simulate the signal on screen, we can show the Lissajous figure delicately. Calculation and simulation of the Lissajous figure are complete ly in accordance with the experiment result. The result of the simulation avoided the wild signals of the experiment. To change the frequency of a perpendicular electric field, we can also obtain the synthesized pictures we need. Compared with the experiment, the effect of simulation is more ideal; and it's valuable for teachers and students to strengthen the understanding of the perpendicular vibration synthesizing principle.
出处 《北京印刷学院学报》 2006年第5期28-30,共3页 Journal of Beijing Institute of Graphic Communication
关键词 正弦波 电子扫描 MATLAB演示 sine wave trace of electron scanning MATLAB simulation
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