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A simulation method of underwater polarization field for transmitted light on wavy water surface

A simulation method and transmitted light technology, applied in the field of optical remote sensing, can solve problems such as the simulation method of underwater transmitted light polarization field, and achieve the effects of true and accurate calculation results, enhanced adaptability, and enriched theoretical knowledge

Inactive Publication Date: 2018-01-16
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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  • A simulation method of underwater polarization field for transmitted light on wavy water surface
  • A simulation method of underwater polarization field for transmitted light on wavy water surface
  • A simulation method of underwater polarization field for transmitted light on wavy water surface

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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 an underwater polarization field simulation method of transmitted light on a wavy water surface. The steps are as follows: first, establish a polarization model based on Rayleigh scattering sky light, and calculate the polarization state of incident sky light; according to the difference in refraction coefficient between the parallel component and the vertical component of the incident light E vector, the Mueller matrix of the refraction process on the calm water surface is obtained; Secondly, the probability distribution model of the bin slope of the wave water surface is established, the reference coordinate system of incident light and transmitted light is unified, and the shielding effect between wind-induced waves is considered to obtain the Mueller matrix of wave water surface refraction; finally, combined with the Stokes parameter representation method, the Polarization field distribution pattern of transmitted light underwater. The invention can effectively simulate the polarization characteristic distribution of the underwater transmitted light under different sun positions, and considers the influence of wind speed and wind direction on the polarization characteristic distribution of the underwater light field. At the same time, it can reveal the polarization state distribution of the transmitted light in the underwater 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(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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