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扩展目标光学特性的理论分析与研究

Theoretic analysis and experimental study on optical characteristics of extended targets

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摘要

利用双向反射分布函数经验公式推导出激光主动照明条件下的目标反射截面表达式,给出了目标反射截面的一种近似计算方法,基于该方法计算了圆锥体目标反射截面。利用固体激光器和CMOS相机搭建实验系统,实际测量了目标反射截面随入射角度和不同目标体等参数变化时的变化情况,实验系统及数据同提出的方法计算得到的结果基本一致。结果表明,目标形状相同,入射角小于45°时,目标反射截面随着无涂层、白色油漆、灰色油漆逐渐变小,大于45°时白色油漆涂层目标反射截面最大; 在目标表面特性相同的时候,目标反射截面随圆板、圆柱、圆锥渐次减小。

Abstract

Based on the target reflection section defined by the bidirectional reflectance distribution Function, a method of approximate calculation and analysis of the cone’s and plate’s reflection section in laser-illuminated condition was put forward. With the method, the reflection section of cone was calculated and analyzed. An experimental platform was established with Nd: YAG laser and CMOS camera, through which the experimental research is carried out on the target characteristics under the condition of laser lighting. The experimental result of the reflection section and its theoretically calculated result were in agreement with each other. The results show that, among different targets of the same shape with no paint, white paint and gray paint layer, if the incidence angle is less than 45°, the reflection section gradually decreases, otherwise, the reflection cross section of the target with white paint layer is greater than the others. Among plate, cylinder and cone shaped targets with the same paint layer, the reflection cross section diminishes by turns.

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中图分类号:TN216

DOI:10.3788/hplpb20132507.1671

所属栏目:高功率激光与光学

基金项目:国防科技预先研究基金项目(2008007)

收稿日期:2012-06-26

修改稿日期:2013-01-05

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作者单位    点击查看

蔡雷:西北核技术研究所, 西安 710024
张世强:西北核技术研究所, 西安 710024
关小伟:西北核技术研究所, 西安 710024

联系人作者:蔡雷(desertscorpion@163.com)

备注:蔡雷(1982-),男,工程师,主要从事激光技术及应用方面研究。

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引用该论文

Cai Lei,Zhang Shiqiang,Guan Xiaowei. Theoretic analysis and experimental study on optical characteristics of extended targets[J]. High Power Laser and Particle Beams, 2013, 25(7): 1671-1674

蔡雷,张世强,关小伟. 扩展目标光学特性的理论分析与研究[J]. 强激光与粒子束, 2013, 25(7): 1671-1674

被引情况

【1】黄健,邓科,蒋大钢,张鹏,朱彬,幺周石. 光电跟踪系统中扩展目标的成像对比度分析. 电光与控制, 2015, 22(5): 6-9

【2】谭亚运,张合,查冰婷. 水中单光束扫描激光引信捕获率建模与仿真. 强激光与粒子束, 2015, 27(11): 111012--1

【3】游安清,王磊,张蓉,宋海峰. 图像中近圆形对象的一种识别方法. 强激光与粒子束, 2015, 27(12): 121004--1

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