Continuous-wave terahertz scanning image resolution analysis and restoration

Qi Li; Qiguo Yin; Rui Yao; Shenghui Ding; Qi Wang

doi:10.1117/1.3366650

1 March 2010 Continuous-wave terahertz scanning image resolution analysis and restoration

Qi Li, Qiguo Yin, Rui Yao, Shenghui Ding, Qi Wang

Author Affiliations +

Optical Engineering, Vol. 49, Issue 3, 037007 (March 2010). https://doi.org/10.1117/1.3366650

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.

©(2010) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Qi Li, Qiguo Yin, Rui Yao, Shenghui Ding, and Qi Wang "Continuous-wave terahertz scanning image resolution analysis and restoration," Optical Engineering 49(3), 037007 (1 March 2010). https://doi.org/10.1117/1.3366650

Published: 1 March 2010

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