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Design and Implementation of Metasurface Rainbow System

A technology of metasurface and realization method, applied in the field of artificial rainbow, can solve the problems of heavy mass, large device volume, inability to realize rainbow arc shape, etc., and achieve the effect of easy integration

Active Publication Date: 2022-06-21
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The linear focal line characteristic of traditional cylindrical lenses cannot realize the arc shape of the rainbow, and the device has limitations such as large volume and heavy weight.
Research exists on reflective metasurfaces or reflective metalenses, but has not been applied to the design of rainbow reproduction systems

Method used

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  • Design and Implementation of Metasurface Rainbow System
  • Design and Implementation of Metasurface Rainbow System
  • Design and Implementation of Metasurface Rainbow System

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Experimental program
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Embodiment 1

[0070] like figure 1 As shown, the present invention provides a design and implementation method of a metasurface rainbow system, comprising the following steps:

[0071] Step 1: Theoretical Design of Metasurface Rainbow System

[0072] Design wavelength λ of the selected system d (such as the center wavelength of the white light spectrum studied), the normal incidence condition of parallel light; the system includes a metasurface cylindrical lens primary mirror M 1 and metasurface mirror M 2 two coaxial elements, such as figure 2 .

[0073] 1. Design the phase distribution of the primary mirror of the metasurface cylindrical lens

[0074] Design and Replacement of Metasurface Cylindrical Lens Primary Mirror M Based on Traditional Converging Cylindrical Lens Model 1 , size (L x ,L 1y ), at z=z 1 =0 plane. at the design wavelength λ d The light is parallel and normal incident on M 1 The surface can converge in the x-z plane at the y=0 position into the image-side f...

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Abstract

The invention discloses a design and implementation method of a metasurface rainbow system, comprising the following steps: theoretically designing a metasurface rainbow system: selecting the design wavelength λ of the system d , the normal incidence condition of parallel light; the system includes the metasurface cylindrical lens primary mirror M 1 and metasurface reflective auxiliary mirror M 2 ; at the design wavelength λ d Under the condition of two metasurfaces M 1 and M 2 phase design; the realization of the rainbow function under white light irradiation: under the condition of normal incidence of parallel light, using the dispersion characteristics of the metasurface, the color spectral distribution of the set form arranged in sequence according to the working wavelength order is obtained on the light screen; Prepare the metasurface rainbow system: prepare the metasurface cylindrical lens primary mirror and the metasurface reflection auxiliary mirror, align the two metasurfaces, and adjust to a suitable distance to realize the focusing and imaging of the metasurface rainbow system performance. The present invention realizes the stable display effect of the semicircular rainbow form in which the color bands are arranged sequentially in the order of wavelength, and can also customize the rainbow effect of any spatial form.

Description

technical field [0001] The invention relates to the technical field of artificial rainbows, in particular to a design and realization method of a metasurface rainbow system. Background technique [0002] The formation of a natural rainbow is due to sunlight being received by the human eye after being refracted-reflected-refracted by dense water droplets in the air. Light of different wavelengths has dispersion. Taking the human eye as the center and the visual axis as the symmetry axis, the viewing angle corresponding to the maximum light intensity of each color light changes monotonically with the wavelength. Since the viewing angle satisfies the rotational symmetry about the viewing axis, each color light exhibits a specific cone angle distribution, so the natural rainbow is in a semi-circular arched state in principle; Arc shape, the imaging effect is unstable. Based on the same principle in laboratory conditions or actual urban landscape systems, arc rainbows can be re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/00
CPCG02B27/0012
Inventor 欧阳敏朱衷正
Owner SOUTH CHINA NORMAL UNIVERSITY