Range-Gated Laser Stroboscopic Imaging for Night Remote Surveillance

• Published in: Chinese physics letters Vol. 27; no. 9; pp. 94 - 97
• Main Author: 王新伟 周燕 范松涛 何军 刘育梁
• Format: Journal Article
• Language: English
• Published: IOP Publishing 01.09.2010
• Subjects: Imaging; Lasers; Low visibility; Night; Signal to noise ratio; Surveillance; Time delay; 低能量; 时间延迟积分; 激光成像; 激光照射; 目标信号; 距离选通; 远程监控; 频闪成像
• ISSN: 0256-307X; 1741-3540
• DOI: 10.1088/0256-307X/27/9/094203

For night remote surveillance, we present a method, the range-gated laser stroboscopic imaging（RGLSI）, which uses a new kind of time delay integration mode to integrate target signals so that night remote surveillance can be realized by a low-energy illuminated laser. The time delay integration in this method has no influence on the video frame rate. Compared with the traditional range-gated laser imaging, RGLSI can reduce scintillation and target speckle effects and significantly improve the image signal-to-noise ratio analyzed. Even under low light level and low visibility conditions, the RGLSI system can effectively work. In a preliminary experiment, we have detected and recognized a railway bridge one kilometer away under a visibility of six kilometers, when the effective illuminated energy is 29.5μl.