干涉型激光直写制作光学可变图像的优化方法

Improved ways of making OVDs with interferential laser direct writing technique

分析了用干涉型激光直写技术制作光学可变图像的优点 ,为达到最佳图像质量和最短运行时间 ,针对不同类型的图像提出光刻轨迹按光栅取向连续曝光和控制光电开关的通断不连续曝光的两种优化运行式 。

Advantages of making optical variable devices (OVDs) with interferential laser direct writing technique are analysized. Two kinds of improved methods are provided to enhance diffraction efficiency of OVDs and shorten running time. Results of the experiments are given.