光子学报, 2014, 43 (8): 0812003, 网络出版: 2014-09-01
旋转粗糙目标动态散斑统计特性研究
The Statistical Properties of Dynamic Speckle Produced by Rotating Rough Target
散射 时间相关函数 相关 旋转目标 散斑 统计特性 激光 Scattering Time correlation function Correlation Rotating target Speckle Statistical properties Laser
摘要
针对旋转目标视线角和角速度的特征识别问题, 基于激光散射理论, 分析了可见光波段激光中旋转对称目标动态特性, 设计了多姿态旋转运动目标的时序散斑测量光路.研究结果表明: 采用多幅图相关函数计算方法对时序图进行处理,得到了不同视线角和角速度的动态散斑归一化时间相关函数曲线.给出了目标范围为0.5r/min~6r/min角速度, 范围为20°~90°视线角与时间统计特性的关系.
Abstract
The dynamic properties of rotating symmetrical targets with visible band laser are analyzed and the time sequence speckle optical system to measure multi-pose rotating targets is designed,with the aim at the characteristics recognition of line-of-sight angle and angular velocity for rotating targets,on the basis of the laser scattering theory.The results reveal that the curve of normalized time correlation function can be achieved by adopting multi-map time correlation function algorithm,for dynamic speckles at different line-of-sight angles and angular speeds; the relationship is obtained of time statistical properties with line-of-sight angle within 20°-90° and angular speed within 0.5r/min-6r/min.
阳志强, 吴振森, 张耿, 巩蕾. 旋转粗糙目标动态散斑统计特性研究[J]. 光子学报, 2014, 43(8): 0812003. YANG Zhi-qiang, WU Zhen-sen, ZHANG Geng, GONG Lei. The Statistical Properties of Dynamic Speckle Produced by Rotating Rough Target[J]. ACTA PHOTONICA SINICA, 2014, 43(8): 0812003.
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