高功率激光装置终端楔形透镜的测量与调试

Measurement and Debugging of Wedge-Shaped Lens in High Power Laser Facility

楔形透镜是高功率激光系统终端光学组件的关键元件,也是较为特殊的光学元件,楔形透镜的楔角测量关系着高功率激光的聚焦性能。终端组件中楔形透镜的加工角度、工作姿态一旦偏离了特定的工作角度,终端组件会引入大的面形偏差,楔形透镜特殊的形状不利于楔形透镜面形、楔角的测量。提出了一整套楔形透镜测量调整方案,包括楔形透镜加工过程中的测量方案,楔形透镜安装过程中的离线测量与调整方案,以及终端组件上线调试过程中的在线调试测量方案。该套方案的实施能够保证楔形透镜的加工精度,及组件中楔形透镜能够工作在最佳工作姿态,保障了高功率激光系统终端组件的光束质量和定位精度。

The wedge-shaped lens is the key and special optical component of the final optics assembly （FOA） in high power laser facility. The wedge-shaped lens wedge angle measurement plays a remarkable role in focusing performance of high power laser. If processing angle and work attitude of the wedge-shaped lens deviate from the specific work angle, big surface deviation will be introduced into the FOA. Special shape of the wedge-shaped lens is not conducive to the measurements of the transmission profile and wedge angle. A set of wedge-shaped lens measurement adjustment programmes is proposed, including measurement of the wedge-shaped lens in processing process, and off-line measurement of wedge-shaped lens during alignment and on-line measurement during the debugging process. The scheme can ensure the processing precision and working attitude of the wedge- shaped lens, guarantee the beam quality and the positioning accuracy of the FOA components of high power laser system.