基于激光距离选通的非视域成像特性分析

doi:10.3969/j.issn.1000-1093.2014.12.011

兵工学报 ›› 2014, Vol. 35 ›› Issue (12): 2003-2009.doi: 10.3969/j.issn.1000-1093.2014.12.011

基于激光距离选通的非视域成像特性分析

许凯达¹，金伟其¹，刘敬¹，郭晖²，裘溯^1,2，李力¹，赵绅有¹

（1.北京理工大学光电学院光电成像技术与系统教育部重点实验室，北京 100081；

收稿日期:2014-05-08 修回日期:2014-05-08 上线日期:2015-02-06
作者简介:许凯达（1980—），男，博士研究生
基金资助:
国家自然科学基金项目（61405013）；高等学校博士学科点专项科研基金项目（20111101110013）

Analysis of Non-line-of-sight Imaging Characteristics Based on Laser Range-gated Imaging

XU Kai-da¹, JIN Wei-qi¹, LIU Jing¹, GUO Hui², QIU Su^1,2, LI Li¹, ZHAO Shen-you¹

(1.Ministry of Education Key Laboratory of Photoelectronic Imaging Technology and System, School of Optoelectronics,Beijing Institute of Technology, Beijing 100081, China;2.National Key Laboratory of Science and Technology on Low Light Level Night Vision, Xi’an 710065, Shaanxi, China)

Received:2014-05-08 Revised:2014-05-08 Online:2015-02-06

摘要/Abstract

摘要： 激光距离选通成像系统借助具有一定镜面反射特性的中介反射面可以实现绕过拐角对隐蔽目标成像，即非视域成像。在对中介反射面模型化的基础上，分析并推导非视域成像系统探测器光敏面上的信号辐照度与干扰辐照度，进而给出非视域图像的对比度模型；结合典型非视域成像系统参量，分析中介面反射特性及其位置对非视域成像的影响。分析结果表明：对于大多数实用的中介反射面，只有采用激光距离选通成像模式才能实现非视域成像；当探测器和目标的位置确定时，中介反射面距离目标越近，非视域成像系统探测、识别目标的难度就越大；在实际使用过程中，采取适当的使用策略或方法可以最大限度发挥系统的性能。文中建立的模型及分析结果对于非视域成像的理论研究、系统设计和实际应用具有指导意义。

关键词: 光学, 激光成像, 距离选通成像, 非视域成像

Abstract: Laser range-gated imaging systems can obtain the images of targets hidden around a corner by using an intermediary reflective surface with certain specular reflection characteristics. This imaging mode is called non-line-of-sight imaging. The target signal irradiance and disturbance radiation on the photo-detector of a non-line-of-sight imaging system are analyzed based on the modeling of an intermediary reflective surface, and an image contrast model of a non-line-of-sight imaging system is constructed. The effects of the reflective characteristics of an intermediary reflective surface and the distance between the intermediary reflective surface and the target or the detector on the image quality are analyzed in terms of the parameters of a typical non-line-of-sight imaging system. The simulation results show that a laser range-gated imaging system is indispensable for non-line-of-sight imaging with commonly used intermediary reflective surfaces without significant specular reflection characteristics, and the distance of the intermediary reflective surface from the target has a significant effect on the non-line-of-sight imaging. When the locations of detector and target are fixed, the non-line-of-sight imaging system can hardly identify the target if the intermediary reflective surface is closer to the target. In practice, the performance of the non-line-of-sight imaging system can be maximized using an appropriate usage strategy.

Key words: optics, laser imaging, range-gated imaging, non-line-of-sight imaging

中图分类号:

TN219

许凯达，金伟其，刘敬，郭晖，裘溯，李力，赵绅有. 基于激光距离选通的非视域成像特性分析[J]. 兵工学报, 2014, 35(12): 2003-2009.

XU Kai-da, JIN Wei-qi, LIU Jing, GUO Hui, QIU Su, LI Li, ZHAO Shen-you. Analysis of Non-line-of-sight Imaging Characteristics Based on Laser Range-gated Imaging[J]. Acta Armamentarii, 2014, 35(12): 2003-2009.

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基于激光距离选通的非视域成像特性分析

Analysis of Non-line-of-sight Imaging Characteristics Based on Laser Range-gated Imaging

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