1 1 Department of Electronic and Optical Engineering, Ordnance Engineering College, Chinese People′s Liberation Army, Shijiazhuang, Heibei 050003, China
2 System Integration Center of Optics and Electronics, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China
3 Chongqing Key Laboratory of Multi-Scale Manufacturing Technology, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China