An optical system for 3D printing and a control method thereof

Abstract

An optical system for 3D printing and a control method thereof are disclosed. The optical system comprises a laser, a beam expanding system, a beam splitter, a spatial light modulator and a focusing system. The spatial light modulator is connected to a computer used for generating a target modulation pattern. The spatial light modulator receives the target modulation pattern generated by the computer and then generates the modulation pattern. A light beam emitted by the laser is subjected to beam expansion into a parallel beam by the beam expanding system and the parallel beam irradiates the beam splitter. The light beam after partial beam expansion reaches the spatial light modulator to be modulated after passing through the beam splitter. After the modulated light beam is reflected to the beam splitter, the light beam after partial beam expansion irradiates a target plane of 3D printing after being focused by the focusing system. According to the optical system and the control method, optical modulation and focusing demodulation are performed by adopting the modulation pattern as a unit, and printing line by line, printing paragraph by paragraph and even printing of the whole plane can be achieved, thus increasing the printing efficiency, accelerating the printing speed, and guaranteeing the 3D printing quality. The optical system and the control method can be widely used in the field of 3D printing.

Description

technical field [0001] The invention relates to the field of 3D printing, in particular to an optical system for 3D printing and a control method thereof. Background technique [0002] 3D printing technology has the ability to directly realize the digital model, which can change the traditional design and manufacturing methods. 3D printing is currently used in aerospace, medical, automotive, and many other fields. However, the application of 3D printing technology in industry still faces many problems, one of the key problems is the slow printing speed. Existing 3D printing equipment, including laser selective sintering (SLS), laser selective melting (SLM), etc., all rely on single-beam or multi-beam laser point-by-point printing, mirrors and lenses controlled by micro-electromechanical systems Combination, to manipulate the movement of the beam focus, so as to achieve point-by-point printing. This printing method is slow and inefficient, which is a major bottleneck in th...

AI Technical Summary

Problems solved by technology

This printing method is slow and inefficient, which is a major bottleneck in the development of 3D printing technology.

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