title: High-resolution terahertz reflective imaging and image restoration.
abstract: 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.
authors.affiliation: National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology, P.O. Box 3031, No. 2 YiKuang Street, Harbin 150080, China. dingshenghui@gmail.com
authors.forename: Sheng-Hui
authors.initials: SH
authors.lastname: Ding
authors.forename: Qi
authors.initials: Q
authors.lastname: Li
authors.forename: Rui
authors.initials: R
authors.lastname: Yao
authors.forename: Qi
authors.initials: Q
authors.lastname: Wang
mesh_terms: D000465:Algorithms; D004867:Equipment Design; D007089:Image Enhancement / Q000295:instrumentation* / Q000379:methods*; D007368:Interferometry; D007834:Lasers; D055069:Terahertz Imaging / Q000295:instrumentation* / Q000379:methods*; D055053:Terahertz Radiation