Method for simulating underwater polarization field of wave water surface transmitted light

A simulation method and transmitted light technology, applied in the field of optical remote sensing, can solve the problem that there is no underwater transmitted light polarization field simulation method.

Inactive Publication Date: 2015-12-23
BEIHANG UNIV
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Problems solved by technology

So far, there is no report on the simulation method of the polarization field of the underwater transmitted light considering the polarization state of the incident light and the fluctuation of the water surface at the same time. The polarization distribution model of the transmitted light on the wave water surface established by the present invention fills this gap

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  • Method for simulating underwater polarization field of wave water surface transmitted light
  • Method for simulating underwater polarization field of wave water surface transmitted light
  • Method for simulating underwater polarization field of wave water surface transmitted light

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Embodiment Construction

[0063] In order to better illustrate the underwater polarization field simulation method of a wave water surface transmitted light involved in the present invention, the method of the present invention is used to perform test calculations, and good results have been achieved. The specific implementation steps are as follows:

[0064] (1) Establish the sky light polarization field coordinate system, set the sun azimuth parameters and observation geometric parameters;

[0065] (2) Sampling the spatial solid angle of the incident sky light direction and observation position on the hemispherical sky;

[0066] (3) Calculate the scattering angle according to the geometric relationship between the sun's incident light and the scattered light direction;

[0067] (4) Calculate the polarization state of the incident sky light;

[0068] (5) Establish the probability distribution model of the bin slope of the wave water surface;

[0069] (6) Establish the vector radiation transfer model...

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Abstract

The invention relates to a method for simulating an underwater polarization field of wave water surface transmitted light. The method comprises the following steps: firstly, building a polarization model based on Rayleigh scattering sky light, and calculating the polarization of incident sky light; according to different refraction coefficients corresponding to a parallel component and a vertical component of an incident light E vector, obtaining a Mueller matrix of a refraction process of a calm water surface; secondly, building a probability distribution model of a wave water surface element gradient, unifying the reference coordinate systems of the incident light and transmitted light, considering the shield effect among wind waves, and obtaining a Mueller matrix of a refraction process of a wave water surface; and finally, combining the Stokes parameter representation method to obtain a polarization field distribution mode of underwater transmitted light. The method can successfully simulate polarization characteristic distribution of underwater transmitted light of different sun positions and takes the influence of wind speed and wind direction on underwater light field polarization characteristic distribution into consideration. Meanwhile, the method can reveal polarization distribution rules of underwater transmitted light in a Snell window.

Description

(1) Technical field [0001] The invention relates to an underwater polarization field simulation method for transmitted light on a wavy water surface, belongs to the field of optical remote sensing, and is of great significance to the research of underwater target detection technology and the application of underwater polarization navigation. (2) Background technology [0002] As a complex natural scene, the wavy water surface changes constantly in space. The underwater transmitted light carries strong polarization information, and has regular distribution and variation characteristics in the Snell window. Studies have found that some aquatic animals can use the polarization properties of transmitted light for navigation and migration. Since the polarization characteristics of light are closely related to the direction of light propagation, the morphological characteristics of the wavy water surface have a great influence on the polarization state distribution of underwater ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J4/02
Inventor 周冠华王继文徐武健牛春跃
Owner BEIHANG UNIV
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