摘要
针对水下激光同步扫描三角测距成像系统受水介质散射和吸收影响导致作用距离减小、目标反射点图像质量变差等问题,从辐射传输理论出发,采用蒙特卡洛方法建立水下激光传输的随机模型,利用TracePro软件进行光线追迹仿真,得到反射点图像相对散射光背景的对比度。探讨了目标距离、激光光强、基线距离、物镜口径等改变对对比度的影响关系,从而对水下激光同步扫描三角测距成像系统参数作了优化设计。最后从系统实际情况和需要出发,确定激光光强1 W,基线距离250 mm,成像物镜50 mm/F 2,确保在7.5 m距离范围内,有较好的目标反射点图像对比度,从而保证了同步扫描三角测距原理的实施。
Aimed at the short working distance and the low target image quality problems of synchronous scanning trigonometric ranging underwater laser imaging system caused by scattering and absorption,a stochastic model of underwater laser transmission is established by using Monte Carlo method based on the radiation transmission theory.The influence of target distance,laser intensity,baseline distance and objective caliber on the contrast quality of laser illumination target reflection image is discussed using TracePro,and the system parameters are optimized.Finally,based on the actual situation and needs of the system,the laser light intensity of 1 W,baseline distance of 250 mm,and the lens specification 50 mm/F 2 are determined to ensure a better image contrast of target reflection point within the range of 7.5 m,thus ensuring the implementation of the synchronous scanning triangulation principle.
作者
肖国梁
屠大维
张旭
XIAO Guo-liang;TU Da-wei;ZHANG Xu(School of Mechatronic Engineering and Automation,Shanghai University,Shanghai 200072,China)
出处
《激光与红外》
CAS
CSCD
北大核心
2019年第8期950-955,共6页
Laser & Infrared
基金
国家自然科学基金项目(No.61673252)
国家重点研发计划课题(No.2016YFC0302401)资助
关键词
同步扫描
对比度
蒙特卡洛
优化
synchronous scanning
contrast
Monte Carlo
optimization
