采用纳秒激光对铜块进行了激光冲击强化，用光学显微镜、三维形貌仪等测量了激光冲击强化后的表面形貌和变形深度，用非接触光学轮廓仪测量了表面粗糙度，重点分析了铝箔胶带作吸收层时凹坑表面微缺陷的来源，对不同粗糙度表面的试样进行了激光冲击强化。实验结果表明，黑漆作吸收层时表面变化特征主要为宏观凹坑和冲击区域出现微凹凸结构；铝箔胶带作吸收层时表面变化特征主要为宏观凹坑和冲击区域出现微缺陷。最后，通过实验研究分析了微缺陷的形成，发现其与铝箔胶带背面黏胶内气泡有关。当原始粗糙度较大时，激光冲击会使整体粗糙度增加，单降低最大高度粗糙度；原始表面光洁度较高时，激光冲击反而会使得整体粗糙度和最大高度粗糙度都有所增加。

In order to study the effect of mixing dye in ferroelectric liquid crystal (FLC) materials, the phase transition temperature and electro-optical properties of azo dye doped FLC samples have been investigated. All the properties have been found to be changed drastically. The results have revealed that not only the SmC*-SmA* transition temperature decreased markedly by the addition of azo-dye, but also dye-doped FLC had lower threshold voltage and saturation voltage than the pure FLC.