We present a high-resolution terahertz (THz) reflective imaging system, operating at $2.52\mathrm{THz}$ , 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.

© 2010 Optical Society of America

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