主动式冲击波双灵敏度精密诊断技术是惯性约束聚变物理实验精密化的关键技术之一，其主要功能是精密诊断惯性约束聚变中多个整形脉冲产生的冲击波加载、追赶的速度历程。对基于神光Ⅲ原型的成像型速度干涉仪技术进行了较全面的介绍。主要包括具有快速自校准能力的高分辨成像技术，束靶耦合物理对象分析与靶型设计技术，高置信度图像提取处理技术等关键技术。该系统空间分辨达到5 μm、时间分辨10~30 ps、测速不确定度小于2%，可对透明介质材料中的多次冲击过程进行连续测量。

The active precision diagnosis technique for shock wave with two-sensitivity is a critical technology in inertial confined fusion (ICF). The main purpose is to diagnose the shock-timing trace generated by the shaped laser pulse. The imaging velocity interferometer system for any reflector (VISAR) is introduced in this paper. Some important techniques are provided, including the probe laser with single mode and shaped capability, imaging technique with high resolution and calibration character. The new target design can be widely used after analyzing the interaction of laser and target. The new flood algorithm with high confidence is programmed. The space resolution of the imaging VISAR is 5 μm , and the time resolution is 10-30 ps. The uncertainty is less than 2%, which has reached the international level. The multi-shocks in transparent material can be continuously measured with this interferometer system.