One-dimensional diffuse reflection random refractive index gradient coating and use thereof
A technology of refractive index gradient and diffuse reflection, applied in the field of random surfaces, can solve problems such as inconvenience and unfavorable practicality
Active Publication Date: 2012-01-04
SOUTHEAST UNIV
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is: as an effective means of electromagnetic stealth, diffuse reflection is inconvenient to directly process and use from a rough surface. Implement diffuse reflection
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[0019] In the present invention, the one-dimensional diffuse reflection random refractive index gradient coating is in the shape of a flat plate, and the thickness of the coating is set to be t, and the direction is the y direction, and a direction orthogonal to the y direction is selected on the coating as the x direction, and simultaneously with the x direction The direction perpendicular to the y direction is the z direction, and the relative refractive index of the cladding layer is non-uniformly distributed in the x direction, but uniformly distributed in the y direction and the z direction. Due to the non-uniform distribution of the relative refractive index of the cladding in the x direction, each locally reflected electromagnetic wave in the x direction is randomly deflected to various angles, thereby producing a diffuse reflection effect.
[0020] The cladding is divided into several sections of equal length along the x direction, and the relative refractive index of e...
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The invention discloses a one-dimensional diffuse reflection random refractive index gradient coating and use thereof. In the invention, the thickness of the coating is set as t, the direction is set to be y direction, a direction orthogonal to the y direction is selected on the coating and used as an x direction, a direction orthogonal to both the x and y directions is determined as a z direction, and the relative refractive indexes of the coating are non-uniformly distributed in the x direction but uniformly in the y and z directions; and the coating is divided into a plurality of sections with equal length along the x direction, the relative refractive indexes of the sections vary along the x direction linearly at a gradient which is randomly sampled in a closed interval ranging from -(2t)-1 to (2t)-1, and the gradient of the relative refractive indexes in each section is a sample. When coated on a good conductor flat plate, the coating can effectively inhibit the mirror-reflected energy of the good conductor flat plate under plane wave irradiation and generate a diffuse reflection effect. In the invention, a flat plate type coating instead of a coarse surface is used to produce the diffuse reflection effect, and the thickness of the coating can be designed to be thinner in favor of practical use. The coating has a certain instructive significance for the design of flat plate coatings and can be easily realized by the traditional novel artificial elevctromagnetic medium.
Description
technical field [0001] The invention belongs to the category of random surfaces, is used in the field of electromagnetic stealth and camouflage, reduces the probability of conductor targets being discovered, and is a one-dimensional diffuse reflection random refractive index gradient coating and its application. Background technique [0002] In recent years, the design and development of new electromagnetic cloaking devices using new artificial electromagnetic media has attracted international attention. The research on new artificial electromagnetic media (Metamaterial) contains a large number of basic scientific problems and technical challenges. The characteristics of the new artificial electromagnetic medium not only depend on the basic unit structure itself, but also on the spatial arrangement of the basic unit. At present, two types of schemes are mainly adopted in the world to use new artificial electromagnetic media to hide objects: one is to reduce or even eliminate...
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IPC IPC(8): G02B1/10G02B5/02
Inventor 崔铁军杨歆汨周小阳程强马慧峰
Owner SOUTHEAST UNIV