采用可见光面阵CCD测量激光的远场能量分布时, 在其光敏面上观察到了规律性圆环条纹的出现。为了精确测量圆环的能量分布和条纹间距, 分析其形成机理, 依据光的干涉和衍射理论, 研究了面阵CCD主要参数的选取。研究结果表明: CCD的分辨率主要取决于衍射效应的条纹间距, 动态范围取决于衍射条纹的级次, 而最低照度由入射激光的功率和作用距离决定。研究成果可为分析规律性圆环条纹的形成机理提供技术支持和有益参考。

The regular circular fringes can be observed at the photosensitive surface when the visible array CCD was used to measure the far-field distribution of laser energy. In order to exactly measure the energy distribution and fringe spacing of circular fringes and analyze their formation mechanism, the selection of main parameters for array CCD were investigated based on the theory of light interference and diffraction. The research results show that the resolution of array CCD depends on the fringe spacing of diffraction, the dynamic range of array CCD depends on the order of diffraction fringe, and the minimum radiation rests with the power of incident laser and distance.