Metamaterial light curing 3D printing method based on holographic optical tweezers

Abstract

The invention provides a metamaterial light curing 3D printing method based on holographic optical tweezers. The method comprises the following steps: choosing liquid photosensitive resin as a raw material of a metamaterial base material and choosing solid particles as artificial micro-structures; designing a geometrical structure and a topological structure of a targeted metamaterial according to a result of finite element computation of a computer; generating a print document and a holographic image document by using source data; respectively transmitting the print document and the holographic image document to 3D printing equipment based on three-dimensional light curing forming and the holographic optical tweezers based on a diffractive optical element; simultaneously generating a plurality of optical potential wells which are distributed in a fixed manner in the liquid photosensitive resin by using the holographic optical tweezers according to the holographic image document; capturing the artificial micro-structures in the various potential wells so that the artificial micro-structures are orderly arranged according to the designed topological structure; setting a print focal distance in the depth of the arranged artificial micro-structures by using the 3D printing equipment based on three-dimensional light curing forming; curing a liquid original base material; and continuously manufacturing in a lamination manner according to the print document so that the three-dimensional complex-curved-surface metamaterial comprising different material base bodies and micro-structures can be produced conveniently.

Description

technical field [0001] The invention belongs to the technical field of metamaterial manufacturing, and in particular relates to a holographic optical tweezers-based photocuring 3D printing method for metamaterials. Background technique [0002] Metamaterials are a kind of artificial composite structures or composite materials with extraordinary physical properties that natural materials do not have. By designing ordered structures on the sub-wavelength material characteristic scale, metamaterials can obtain special properties beyond the limits of the natural laws of inherent materials in nature. Functions have greatly expanded the research scope of electromagnetics, optics, acoustics and other disciplines, and have shown great potential value and application prospects in aerospace, aviation, electronics, communications, Internet of Things, biomedical equipment, military and other fields. The functions endowed by metamaterials come from their internal artificial structures ra...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the shortcomings of the above-mentioned metamaterial manufacturing technology and various limitations of the existing 3D printing technology, the present invention provides a metamaterial light-cured 3D printing method based on holographic optical tweezers, through which the microstructure in the photosensitive liquid manufacturing environment can be realized Controllable arrangement, thus forming a predetermined topology, solving the problem that the 3D printing technology based on stereolithography cannot use two different materials to prepare the same structure

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