Method for calculating light scattering characteristic of compactibility granule medium

A particle medium, light scattering technology, applied in the measurement of scattering characteristics, the use of optical devices, instruments, etc., can solve the problems of not considering surface scattering, not considering dense media, etc.

Inactive Publication Date: 2010-07-21
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

In the Hapke model, the influence of the surface shape of the dense medium on the sca

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  • Method for calculating light scattering characteristic of compactibility granule medium
  • Method for calculating light scattering characteristic of compactibility granule medium
  • Method for calculating light scattering characteristic of compactibility granule medium

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Embodiment Construction

[0015] The invention provides an optical scattering characteristic model for calculating the dense scattering medium, and the output of the model is the bidirectional reflection distribution function (BRDF) of the dense scattering medium. Such as figure 1 As shown, the light scattering of the medium includes surface scattering and volume scattering. Surface scattering is the effect of the surface of the medium on light, and volume scattering is the effect of particles inside the medium on light. Therefore, the steps to calculate the bidirectional reflectance distribution function BRDF include two parts: first calculate the BRDF of the surface scattering of the scattering medium, and then calculate the BRDF of the scattering of the scattering medium body, and the sum of the two calculations is the BRDF output by the model. In the surface scattering, the effect of the surface shape of the medium on the scattering is fully considered.

[0016] Refer to the attached figure 2 T...

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Abstract

The invention provides a method for calculating the light scattering characteristic of compactibility granule medium, which divides light scattering characteristic-BRDFof the the compactibility granule medium into two parts to calculate, i.e. an interface scattering BRDF and a volume scattering BRDF. Scattering medium interface scattering is calculated and obtained by the wave analytic theory, the volume scattering BRDF is calculated and obtained by the radioactive transfer theory, and the sum of the two parts of calculation is the light scattering characteristic of the compactibility granule medium. The invention combines the radioactive transfer theory with the wave analytic theory for the first time; compared with the previous compactibility medium light scattering models, the invention fully considers the functions of the medium surface shape on the light scattering characteristic, adds a parameter for describing the scattering medium surface roughness degree and improves the calculation precision.

Description

technical field [0001] The invention relates to a method for calculating light-scattering characteristics of a compact medium, and the calculated spectrum ranges from 0.4 microns to 2.5 microns in the visible light band. Background technique [0002] The light scattering characteristics of the medium refer to the influence of the medium on the light wave after the light wave is irradiated on the medium (including the reflection and refraction of light and the absorption of light). For dense media, the light scattering properties of the medium can be studied by studying the bidirectional reflection properties of the medium (specifically, the bidirectional reflection distribution function BRDF of the medium). The main factors affecting the two-way reflection characteristics of the medium are the composition of the medium, the internal crystal structure of each component, and the surface shape of the medium. Therefore, the study of the two-way reflection characteristics of the...

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Application Information

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IPC IPC(8): G01N21/49G01B11/30
Inventor 田岩陈明吴迎春
Owner HUAZHONG UNIV OF SCI & TECH
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