Ding Sheng-Hui, Li Qi, Yao Rui, Wang Qi
National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology, P.O. Box 3031, No. 2 YiKuang Street, Harbin 150080, China.
Appl Opt. 2010 Dec 20;49(36):6834-9. doi: 10.1364/AO.49.006834.
We present a high-resolution terahertz (THz) reflective imaging system, operating at 2.52 THz, that employs a continuous-wave THz gas laser and a pyroelectric detector. The spatial resolution was evaluated from the system's modulation transfer function and tested by scanning a series of resolution targets. To further improve the image quality, Lucy-Richardson method was adopted to restore the scanning result. With the scanning spot profile measured using knife edge method, a satisfying restoration result can be obtained. Finally, the system's performance was observed by imaging some different test objects.
我们展示了一种工作在2.52太赫兹的高分辨率太赫兹（THz）反射成像系统，该系统采用连续波太赫兹气体激光器和热释电探测器。通过系统的调制传递函数评估空间分辨率，并通过扫描一系列分辨率目标进行测试。为了进一步提高图像质量，采用Lucy-Richardson方法对扫描结果进行恢复。利用刀口法测量扫描光斑轮廓，可获得令人满意的恢复结果。最后，通过对一些不同测试物体成像来观察系统的性能。
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