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Optical Engineering

Continuous-wave terahertz scanning image resolution analysis and restoration
Author(s): Qi Li; Qiguo Yin; Rui Yao; Shenghui Ding; Qi Wang
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Paper Abstract

Resolution of continuous-wave (CW) terahertz scanning image is limited by many factors among which the aperture effect of finite focus diameter is very important. We have investigated the factors that affect terahertz (THz) image resolution in details through theory analysis and simulation. On the other hand, in order to enhance THz image resolution, Richardson-Lucy algorithm has been introduced as a promising approach to improve image details. By analyzing the imaging theory, it is proposed that intensity distribution function of actual THz laser focal spot can be approximatively used as point spread function (PSF) in the restoration algorithm. The focal spot image could be obtained by applying the pyroelectric camera, and mean filtering result of the focal spot image is used as the PSF. Simulation and experiment show that the algorithm implemented is comparatively effective.

Paper Details

Date Published: 1 March 2010
PDF: 5 pages
Opt. Eng. 49(3) 037007 doi: 10.1117/1.3366650
Published in: Optical Engineering Volume 49, Issue 3
Show Author Affiliations
Qi Li, Harbin Institute of Technology (China)
Qiguo Yin, Harbin Institute of Technology (China)
Rui Yao, Harbin Institute of Technology (China)
Shenghui Ding, Harbin Institute of Technology (China)
Qi Wang, Harbin Institute of Technology (China)

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