Light curing 3D printing equipment and image exposure system

Abstract

The invention relates to an image exposure system of 3D printing equipment. The image exposure system comprises a spatial light modulator, a light source, a projection lens, a micro-displacement driving mechanism and a controller. The spatial light modulator has multiple micro-mirrors and is used for adjusting reflection direction of light irradiated on the micro-mirrors according to control signals, and each micro-mirror is a concave mirror and is used for converging light irradiated on the micro-mirror into micro-spot with the size being less than corresponding pixel size of the micro-mirror. The light source generates a light beam irradiated on the spatial light modulator. The projection lens is directed at a first direction of the spatial light modulator to make the light source to be projected onto the surface of a light-sensitive material through a micro-spot array formed by the micro-mirrors. The micro-displacement driving mechanism is connected with the spatial light modulator and can drive the spatial light modulator to move in a third direction and a fourth direction, which are perpendicular to each other, so as to fine-tune the position of the micro-spot array projected on the surface of the light-sensitive material. The controller is used for ordering the light source to expose more than once and ordering the micro-displacement driving mechanism to move during each exposure so as to project the exposed micro-spot array to different positions on the surface of the light-sensitive material.

Description

technical field [0001] The invention relates to photocurable 3D printing equipment, in particular to an image exposure system of photocurable 3D printing equipment. Background technique [0002] 3D printing technology is based on the computer three-dimensional design model, through the software layered discrete and numerical control forming system, using laser beams, hot-melt nozzles, etc. to accumulate metal powder, ceramic powder, plastic, cell tissue and other special materials layer by layer Bonding, and finally overlaying and molding to create a solid product. Unlike the traditional manufacturing industry, which shapes and cuts raw materials through mechanical processing methods such as moulds, turning and milling to finally produce finished products, 3D printing transforms a three-dimensional entity into several two-dimensional planes. The manufacturing complexity is reduced. This digital manufacturing mode does not require complex processes, huge machine tools, or a...

AI Technical Summary

Problems solved by technology

DMD has many advantages in 3D printing. For example, it can handle ultraviolet light below 400nm without worrying about being damaged. However, its limited resolution restricts its development. For example, the current highest resolution of DMD is 1920×1080

However, this resolution can only produce objects with an area of ​​192×108mm with the commonly used 0.1mm precision in 3D printing, which obviously limits its application.

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