RGB color image coding method based on single-size nano-structure metasurface

Abstract

The invention discloses an RGB color image coding method based on a single-size nano-structure metasurface, and the method comprises the steps: achieving the multiplexing of three information channels through a metasurface polarizer which is only composed of a plurality of nano-brick structure unit arrays through the degeneracy of a steering angle of a nano-brick structure unit and the conversion relation between decimal data and binary data; the three information channels are mutually independent and are respectively used for storing coding information of R, G and B color components. According to the invention, the conversion among three channels can be realized by changing the polarization direction of incident polarized light and the direction of the light transmission axis of the polarization analyzer. The information stored in the three channels is unrelated and can be designed at will, and the information storage requirement of the RGB color image is met. Moreover, the metasurface designed by the invention is simple in structure, can be highly integrated, and is suitable for the trend of miniaturization and integration of devices.

Description

technical field [0001] The invention belongs to the technical field of micro-nano optics and polarized optics, and in particular relates to an RGB image encoding method based on a single-size nanostructure metasurface. Background technique [0002] Any color in an RGB image can be represented by a mixture of the three primary colors R, G, and B in different proportions, so its information encoding usually requires three channels. The traditional color image storage and display technology has been unable to meet the requirements of the gradual miniaturization of optical systems due to problems such as large pixel size, while metasurfaces have sub-wavelength structural units. The amplitude, phase, etc. of the metasurface can be adjusted, showing extremely high image resolution advantages in image storage and display, and the metasurface is small in size, light in weight, simple in structure, and easy to integrate. In metasurface-based color image coding, a superunit composed ...

AI Technical Summary

Problems solved by technology

In metasurface-based color image coding, a superunit composed of nano-bricks of various sizes is usually used as a pixel, and each nano-brick acts on R, G, and B respectively, but this method inevitably increases The design and processing difficulty of metasurface also reduces the information capacity

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