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Optical Engineering

High-precision terahertz frequency modulated continuous wave imaging method using continuous wavelet transform
Author(s): Yu Zhou; Tianyi Wang; Bing Dai; Wenjun Li; Wei Wang; Chengwu You; Kejia Wang; Jinsong Liu; Shenglie Wang; Zhengang Yang
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Paper Abstract

Inspired by the extensive application of terahertz (THz) imaging technologies in the field of aerospace, we exploit a THz frequency modulated continuous-wave imaging method with continuous wavelet transform (CWT) algorithm to detect a multilayer heat shield made of special materials. This method uses the frequency modulation continuous-wave system to catch the reflected THz signal and then process the image data by the CWT with different basis functions. By calculating the sizes of the defects area in the final images and then comparing the results with real samples, a practical high-precision THz imaging method is demonstrated. Our method can be an effective tool for the THz nondestructive testing of composites, drugs, and some cultural heritages.

Paper Details

Date Published: 26 February 2018
PDF: 7 pages
Opt. Eng. 57(2) 023108 doi: 10.1117/1.OE.57.2.023108
Published in: Optical Engineering Volume 57, Issue 2
Show Author Affiliations
Yu Zhou, Huazhong University of Science and Technology, School of Optical and Electronic Information, Wuhan N (China)
Tianyi Wang, Huazhong Univ. of Science and Technology (China)
Bing Dai, Huazhong Univ. of Science and Technology (China)
Wenjun Li, Huazhong Univ. of Science and Technology (China)
Wei Wang, Huazhong Univ. of Science and Technology (China)
Chengwu You, Huazhong Univ. of Science and Technology (China)
Kejia Wang, Huazhong Univ. of Science and Technology (China)
Jinsong Liu, Huazhong Univ. of Science and Technology (China)
Shenglie Wang, Huazhong Univ. of Science and Technology (China)
Zhengang Yang, Huazhong Univ. of Science and Technology (China)


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