A 3D printing method and system based on holographic projection

Abstract

The invention discloses a 3D printing method and printing system based on holographic projection; the printing method includes: prefabricating a holographic dry plate with a hologram of an object to be printed; coherent light emitted by a coherent light source along a preset holographic projection imaging The optical path passes through the holographic dry plate, and forms a three-dimensional real image corresponding to the object to be printed in the preset projection space; the three-dimensional real image makes the photosensitive material preset in the projection space polymerized and solidified at one time, forming A three-dimensional structural object whose size and appearance are consistent with the three-dimensional real image. In the present invention, a photosensitive material matching the light intensity distribution of the three-dimensional real image is set in the projection space to realize one-time omnidirectional three-dimensional polymerization, thereby realizing the one-time completion of the forming process of complex structural samples without going through point- Line-surface-body gradually and continuously accumulates the forming process, which greatly shortens the forming time and improves work efficiency and forming accuracy.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing, in particular to a 3D printing method and system based on holographic projection. Background technique [0002] 3D printing is a common name for additive manufacturing. Its core is the combination of digital, intelligent manufacturing and material science. It is the opposite of the traditional subtractive manufacturing method of machining and cutting raw materials. [0003] Now there are different methods of 3D printing technology on the market, the common ones are: FDM (fused deposition), SLA (light curing), SLS (selective laser sintering), DLP (digital light processing), etc. The process is only a way of cumulative printing step by step, that is, it is necessary to layer the print sample data, then start printing from points, to lines, to surfaces, and finally superimpose layers on three-dimensional entities (DLP is directly from surface to body. printing process). This will re...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a 3D printing method and system based on holographic projection in view of the above-mentioned defects of the prior art, aiming to solve the processing problems brought about by the traditional additive manufacturing method of gradually accumulating printing in the prior art. Low efficiency, long processing time and other shortcomings, while overcoming the shortcomings of the existing one-time 3D molding technology that cannot make complex structures, poor molding effect and precision

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