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Active polarization imaging target discrimination method based on polarization Fresnel reflectivity

A technology of Fresnel reflection and active polarization, which is applied in the direction of polarization influence characteristics, can solve problems such as instability, and achieve the effect of simple implementation, improved robustness and universality

Inactive Publication Date: 2017-03-08
NANJING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, due to the instability of stray light in the external environment and many other interferences, passive polarization imaging is limited in practical applications.

Method used

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  • Active polarization imaging target discrimination method based on polarization Fresnel reflectivity
  • Active polarization imaging target discrimination method based on polarization Fresnel reflectivity
  • Active polarization imaging target discrimination method based on polarization Fresnel reflectivity

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Embodiment Construction

[0023] It is easy to understand that, according to the technical solution of the present invention, without changing the essence of the present invention, those skilled in the art can imagine a variety of methods of active polarization imaging target discrimination based on polarization Fresnel reflectance in the present invention. implementation. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the entirety of the present invention or as a limitation or limitation on the technical solution of the present invention.

[0024] Such as figure 2 Shown, the present invention comprises the following steps:

[0025] Step 1. Construct the optical path so that the incident light generated by the light source is reflected by the surface of the object, and then passes through the polarizer to reach the detector. The detector detects the reflected light intensity, ...

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Abstract

The invention provides an active polarization imaging target discrimination method based on polarization Fresnel reflectivity. According to the method, the zenith angles of the incidence direction and the detection direction are changed to obtain multiple theoretical and real polarization Fresnel reflectivities; related optical constants of a target object are recovered and obtained from the theoretical and real polarization Fresnel reflectivities; and then based on the optical constants, different materials can be distinguished to discriminate the target. The provided method can conveniently and effectively discriminate a target, and at the same time, robustness and universality of polarization in discrimination engineering application are improved.

Description

technical field [0001] The invention belongs to the technical field of target imaging, and relates to an active polarization imaging target identification method, in particular to an active polarization imaging target identification method based on polarization Fresnel reflectance. Background technique [0002] For the imaging target recognition system, the polarization information, as the new one-dimensional information of the target, is a basic optical characteristic of the target surface. The polarization characteristics of the target are related to the material of the target, the shape of the target surface, and the roughness of the target surface. . Due to the complexity of the mechanism of the polarization characteristics itself, as well as the high requirements for detection and identification devices and systems, especially on the rough target surface, the modeling of the polarization characteristics of the object is a difficult problem. The more popular distributio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/21
Inventor 潘佳惠陈钱吕芳俞晓东
Owner NANJING UNIV OF SCI & TECH
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