A passive THz imaging system based on the crank-rocker mechanism

Author

Jingshui Zhang ; Yuejin Zhao ; Weiwen Zhu ; Hong Wu ; Liangliang Zhang ; Liquan Dong ; Cunlin Zhang

Author_Institution

Beijing Inst. of Technol., Beijing, China

fYear

2013

fDate

1-6 Sept. 2013

Firstpage

1

Lastpage

2

Abstract

A novel passive single-channel THz imaging system employing a Cassegrain antenna of 390 mm in diameter and Schottky diodes as detecting part, and the cooperation of a high-speed line scanning mirror driven by a crank-rocker mechanism and a frame scanning mirror as two-dimensional optical-mechanical scanning part is described in this paper. The single frame imaging time of the system is only 20s, the field of view (FOV) is 30° × 36°, and the angle resolution is up to 0.6°. The experimental results show that the low cost, simple structure and efficient system can clearly image the human body, and effectively detect dangerous items concealed under the clothes.

Keywords

Schottky diodes; mirrors; reflector antennas; terahertz wave imaging; Cassegrain antenna; FOV; Schottky diodes; crank-rocker mechanism; dangerous item detection; field of view; frame scanning mirror; high-speed line scanning mirror; human body; passive THz imaging system; passive single-channel THz imaging system; size 390 mm; two-dimensional optical-mechanical scanning; Antennas; Metals; Microwave imaging; Millimeter wave communication; Mirrors; Radar imaging;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2013 38th International Conference on

Conference_Location

Mainz

Type

conf

DOI

10.1109/IRMMW-THz.2013.6665886

Filename

6665886