| [1] | ZHOU L, ZHANG Zh W. Nondestructive testing and its new technology[J]. Journal of Chongqing Institute of Technology, 2006,20(8):46-48(in Chinese). |
| [2] | FU T H, LIU S P. Review of manual scan ultrasonic imaging methods for composite materials[J]. Nondestructive Testing, 2012,34(8):50-54 (in Chinese). |
| [3] | WEN M P, TIAN Y, YOU K X. Multiple ultrasonic pulse-echo method for testing composite component bonding quality[J]. Journal of Test and Measurement Technique, 1996,10(2/3):679-682(in Chinese). |
| [4] | KARPOWICZ N, ZHONG H, ZHANG C, et al. Compact continuous-wave subterahertz system for inspection applications. Applied Physics Letters, 2005, 86(5): 054105. |
| [5] | RECUR B, YOUNUS A, SALORT S, et al. Investigation on reconstruction methods applied to 3-D terahertz computed tomography. Optics Express, 2011,19(6): 5105-5117. |
| [6] | WALKER J L, RICHTER J D. Nondestructive evaluation of foam insulation for the external tank return to flight//Proceedings of the 47th American Institute of Aeronautics and Astronautics /ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. Huntsville, AL,USA:American Institute of Aeronautics and Astronautics,2006:20060050249. |
| [7] | YANG Zh G, LIU J S, WANG K J. Experimental research on nondestructive inspection for multilayer cellular samples using continuous terahertz waves imaging system[J]. Journal of Optoelectronics·Laser,2013,24(6):1158-1162(in Chinese). |
| [8] | AM W C, von SPIEGEL W, HENNEBERGER R, et al. Fast active THz camera with range detection by frequency modu-lation[J]. Proceedings of the SPIE, 2009, 7215:72150F. |
| [9] | KARPOWICZ N, REDO A, ZHONG H, et al. Continuous-wave terahertz imaging for non-destructive testing applications[C]//Infrared and Millimeter Waves and 13th International Conference on Terahertz Electronics, 2005. New York, USA:IEEE,2005: 329-330. |
| [10] | LIU B, LIU J M. A method of the realization of high accuracy in FMCW ranging system[J]. Journal of Electronic Measurement and Instrument, 2001,15(3):41-45(in Chinese). |
| [11] | ZHANG W, LEI Y Zh. Progress in terahertz nondestructive testing[J]. Chinese Journal of Scientific Instrument, 2008,29(7):1563-1568(in Chinese). |
| [12] | JANSEN C, WIETZKE S, PETERS O, et al. Terahertz imaging: applications and perspectives[J]. Applied Optics, 2010, 49(19): E48-E57. |