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Proceedings Paper

Terahertz multi-wavelength imaging for nondestructive detection
Author(s): Liangliang Zhang; Hua Zhong; Chao Deng; CunLin Zhang
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Paper Abstract

We present a terahertz two dimensional phase imaging method with multiwavelength. This novel approach can image object with larger optical length compared to using the largest wavelength in the terahertz spectrum and does not involve the usual phase unwrapping in the detection of phase discontinuity. Furthermore, this technique can significantly decreases the background noise and allows one to resolve very fine structures for non-destructive detection. The validity of this new method can be demonstrated by processing the terahertz raster-scan two-dimensional(2D) image data of a polyethylene wedge and a piece of foam with a rectangle groove. The measurements show that the multiwavelength phase imaging is a straightforward and efficient phase data processing method in terahertz imaging application.

Paper Details

Date Published: 5 August 2009
PDF: 5 pages
Proc. SPIE 7385, International Symposium on Photoelectronic Detection and Imaging 2009: Terahertz and High Energy Radiation Detection Technologies and Applications, 73850V (5 August 2009); doi: 10.1117/12.836175
Show Author Affiliations
Liangliang Zhang, Capital Normal Univ. (China)
Hua Zhong, Capital Normal Univ. (China)
Chao Deng, Capital Normal Univ. (China)
CunLin Zhang, Capital Normal Univ. (China)


Published in SPIE Proceedings Vol. 7385:
International Symposium on Photoelectronic Detection and Imaging 2009: Terahertz and High Energy Radiation Detection Technologies and Applications
X.-C. Zhang; James M. Ryan; Cun-lin Zhang; Chuan-xiang Tang, Editor(s)

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