Abstract

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

High-resolution reconstruction for terahertz imaging

Li-Min Xu, Wen-Hui Fan, and Jia Liu
Appl. Opt. 53(33) 7891-7897 (2014)

Image restoration algorithm for terahertz FMCW radar imaging

Weidong Hu, Zhihao Xu, Huanyu Jiang, Qingguo Liu, Zhiyu Yao, Zhen Tan, and Leo P. Ligthart
Appl. Opt. 62(20) 5399-5408 (2023)

Terahertz image super-resolution based on a deep convolutional neural network

Zhenyu Long, Tianyi Wang, ChengWu You, Zhengang Yang, Kejia Wang, and Jinsong Liu
Appl. Opt. 58(10) 2731-2735 (2019)

Real-time terahertz scanning imaging by use of a pyroelectric array camera and image denoising

Qi Li, Sheng-Hui Ding, Rui Yao, and Qi Wang
J. Opt. Soc. Am. A 27(11) 2381-2386 (2010)

Adaptive terahertz image super-resolution with adjustable convolutional neural network

Yade Li, Weidong Hu, Xin Zhang, Zhihao Xu, Jiaqi Ni, and Leo P. Ligthart
Opt. Express 28(15) 22200-22217 (2020)