空间光学相位调制系统对绝缘膜表面电荷分布的可视化研究

Proceedings of 1994 4th International Conference on Properties and Applications of Dielectric Materials (ICPADM) Pub Date : 1994-07-03 DOI:10.1109/ICPADM.1994.414102

T. Kawasaki, T. Terashima, T. Takada, T. Maeno

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引用次数: 0

摘要

利用波克尔斯效应和计算机图像处理技术，提出了一种电介质上潜在电荷图像的可视化和定量技术。采用光相位调制技术和计算机锁相放大器处理提高了信噪比。该测量系统有几个改进的性能:表面电荷的灵敏度为1 nC cm/sup -2/;空间分辨率200 /spl mu/m;以及电荷极性的区分。描述了先进的电光表面电荷测量的基本原理，并演示了脉冲高压(5 kV/次峰/)产生的正放电流光的典型表面电荷分布。并对调制方法和非调制方法进行了比较

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Visualization of surface charge distribution on insulating films using spatial optical phase modulation system

A visualization and a quantification technique of a latent electric charge image on a dielectric material has been developed by using Pockels effect and a computer image processing. An optical phase modulation technique and computer image lock-in amplifier processing were used to improve the signal to noise ratio. The measurement system has several improved performances: a sensitivity of surface charge of 1 nC cm/sup -2/; a spatial resolution of 200 /spl mu/m; and discrimination of the charge polarity. The basic principle of advanced electrooptic surface charge measurement is described and the typical surface charge distribution of a positive discharge streamer produced by an impulse high voltage (5 kV/sub peak/) is demonstrated. A comparison is also made between the modulation method and the nonmodulation method.<>

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Proceedings of 1994 4th International Conference on Properties and Applications of Dielectric Materials (ICPADM)

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