Laser-induced free-form surface periodic nanostructure pattern and coloring method

Abstract

The invention discloses a laser-induced free-form surface periodic nanostructure pattern and coloring method which is characterized in that periodic sub-wavelength stripes are prepared on a plane or acurved surface by utilizing a built laser synchronous polarization control processing system and a computer-aided manufacturing program and through accurately controlling mechanical motion and laserirradiation parameters, so that the synchronous control over a laser polarization direction and the accurate control over a stripe direction are achieved, and different coloring effects are achieved through different stripe directions. Compared with the prior art, the laser-induced free-form surface periodic nanostructure pattern and coloring method provided by the invention has the advantages that different coloring effects are achieved by utilizing the influence of different laser energy flow densities and scanning rates on stripe formation, and particularly, the method has the advantages ofobvious advantages, high precision, convenience in operation, economy and high efficiency in the aspect of preparing the complex color patterns with clear and bright periodic nanostructures on the curved surface.

Description

technical field [0001] The invention relates to the technical field of laser micro-nano manufacturing, in particular to a laser-induced free-form surface periodic nanostructure pattern and coloring method. Background technique [0002] People have experienced laser-induced periodic surface structure for more than half a century, and its functional application fields include: anti-reflection, anti-counterfeiting, coloring of material surface, modification of material surface wettability, control of cell reaction, change of tribological properties, change of colony or cell growth rate, etc. However, this technology can select the appropriate distance to realize the seamless connection of periodic stripes on the two-dimensional plane, but for the three-dimensional free-form surface, the seamless splicing is relatively difficult, and traditional computer-aided manufacturing (CAM) software cannot realize it. [0003] In the prior art, scanning galvanometers are used to realize t...

AI Technical Summary

Problems solved by technology

However, this technology can select the appropriate distance to realize the seamless connection of periodic stripes on the two-dimensional plane, but for the three-dimensional free-form surface, the seamless splicing is relatively difficult, and traditional computer-aided manufacturing (CAM) software cannot realize it.

[0003] In the existing technology, the scanning galvanometer is used to realize the function of operating periodic stripes in sub-regions in the free-form surface, but there is a problem of inconsistency in the incident direction of the laser in a scanning region, and many processing parameters change slightly

Polarization devices usually cannot achieve parallel control with lasers and three-dimensional motion systems, and the response speed, degree of automation and precision often cannot meet the requirements at the same time.

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