1. Jiangxi Engineering Laboratory for Optoelectronics Testing Technology, Nanchang Hangkong University, Nanchang330063, P. R. China
2. National Engineering Laboratory for Non-Destructive Testing and Optoelectronic Sensing Technology and Applications, Key Laboratory of Nondestructive Testing Ministry of Education, School of the Testing and Photoelectric Engineering, Nanchang Hangkong University, Nanchang330063, P. R. China