水下环境光学特性测量方法

摘要

In order to realize optical detection of underwater vehicle,the mechanism of optical properties measurement of underwater environment is studied,and measurement method for o-cean downward radiation and upward radiation is established.Based on the analysis of distribu-tion law of ocean downward radiation,the ocean downward radiation model is simplified,Janus ocean downward irradiance measurement model is established,the irradiance optical probe is de-signed,the ocean upward radiation measurement method is determined,and the optical probe response scale is designed.Results show that downward irradiance is determined by scalar irra-diance,scattering coefficient,volume attenuation coefficient and diffuse attenuation coefficient. The incident angle is the incident radiance.When incident angle is less than 70°,cosine error is less than 5%.Measurement of ocean downward irradiance is optimized by Janus design.The es-tablishment of ocean downward radiation and upward radiation measurement method has laid a technical support for underwater visualization of target environment.%为实现水下对航行器光学探测,研究了水下环境光学特性测量机理,确立了海洋下行辐射、海洋上行辐射测量方法.在分析海洋下行辐射分布规律的基础上,简化了海洋下行辐射模型,建立了Janus海洋下行辐照度测量模型,设计了辐照度光学探头,确定了海洋上行辐射测量方法,并完成光学探头的响应度定标设计.分析表明,下行辐照度由标量辐照度、散射系数、体积衰减系数和漫衰减系数共同决定,均匀角分布入射辐射率,当入射角小于70°时,余弦误差小于5%,采用的Janus设计优化了海洋下行辐照度的测量.海洋下行辐射、海洋上行辐射测量方法的建立,为水下实现目标环境光学特性测量奠定了技术理论支撑.