Nearly 180-degree water body three-dimensional volume scattering function measuring system

Abstract

A nearly 180-degree water body three-dimensional volume scattering function measuring system comprises a laser transmitter, an off-axis parabolic mirror, a scatterer, an aspherical lens group, a small-hole diaphragm, a CMOS (complementary metal oxide semiconductor) polarization sensitive camera and a computer, wherein the scatterer is positioned at the focus of the off-axis parabolic mirror. Incident laser passes through a small hole in the back face of the off-axis parabolic mirror, penetrates through the reflecting face and enters the scatterer, nearly 180-degree backward scattered light of the scatterer is reflected by the off-axis parabolic mirror and converted into parallel light beams, and the parallel light beams are collimated through the aspherical lens group and then received by the CMOS polarization sensitive camera. According to the corresponding relation between the backward scattering angle and the CMOS pixel point position, the nearly 180-degree volume scattering function of the water body on different azimuth angle scattering planes can be obtained. The measuring system provided by the invention can be used for measuring the nearly 180-degree water body three-dimensional volume scattering function.

Description

technical field [0001] The invention belongs to the field of ocean optics, and in particular relates to a measuring system and a measuring method for a three-dimensional volume scattering function of a nearly 180-degree water body. Background technique [0002] The main components of ocean water include pure water, soluble salt, suspended particulate matter and soluble organic matter. Therefore, ocean optics is the study of optical parameter characteristics of ocean water, the interaction of light in ocean water components, and the effect of light in ocean water. The laws of transmission and optical phenomena belong to the interdisciplinary field of physical oceanography and optics. As the three elements of ocean water color, chlorophyll, yellow matter (CDOM), and suspended particles are important factors that affect the optical properties of the ocean. In seawater, the main objects that cause light scattering are water molecules in seawater and suspended particles in seawat...

AI Technical Summary

Problems solved by technology

[0004] The backward small-angle scattering measurement of seawater is of great significance to laser remote sensing, and the measurement of water body scattering on the market is mainly for wide-angle scattering measurement and forward small-angle scattering measurement, and in the wide-angle scattering measurement system, it can measure nearly 180 The measurement effect of measuring instruments near 180 degrees is not good, so it is necessary to propose a measurement system and method for small-angle backscattering of water bodies to improve the accuracy of the volumetric scattering function of water bodies near 180 degrees

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