Design method of super-surface color nanometer printing device capable of reconstructing watermarks

Abstract

The invention provides a design method of a super-surface color nano printing device for realizing reconfigurable watermarks. The design method comprises the following steps: constructing a super-surface array; optimizing and simulating to obtain reflection spectrums of the nano-brick structural units with multiple groups of size parameters, and calculating to obtain structural colors of the nano-brick structural units; designing a target color image, and selecting several groups of size parameters with structure colors meeting requirements as alternative size parameters according to color distribution of the target color image; finding size parameters corresponding to the nano-brick structure units corresponding to the pixel points from the alternative size parameters according to the colors of the pixel points of the target color image; and designing a watermark image to be superposed, setting the nano-brick steering angle of the nano-brick structure unit corresponding to the pixel points without watermark superposition as alpha on the basis of the steps, and setting the nano-brick steering angle of the nano-brick structure unit corresponding to the pixel points with watermark superposition as alpha + / -90 degrees. The machining error tolerance is high, the design and machining difficulty is reduced, and the good development prospect is achieved.

Description

technical field [0001] The invention belongs to the technical field of micro-nano optics, and in particular relates to a design method of a super-surface color nano-printing device for realizing a reconfigurable watermark. Background technique [0002] The current structural color nanoprinting scheme based on polarization multiplexing usually adjusts the spectral response of polarized light in two orthogonal directions by designing the long and short axis dimensions of the nanounit structure. However, in this type of scheme, when the long-axis or short-axis size of the nanounit is changed independently, the transmission and reflection spectra of polarized light in both directions will be affected, and the spectral response of polarized light in a certain direction cannot be independently adjusted. The design and processing of multiplex structured color nanoprinting schemes are difficult. Contents of the invention [0003] The purpose of the present invention is to address...

AI Technical Summary

Problems solved by technology

However, in this type of scheme, when the long-axis or short-axis size of the nanounit is changed independently, the transmission and reflection spectra of polarized light in both directions will be affected, and the spectral response of polarized light in a certain direction cannot be independently adjusted. The design and processing of multiplex structured color nano-printing schemes are difficult

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