Exposure energy homogenization method for surface exposure rapid shaping system

Abstract

The invention discloses an exposure energy homogenization method for a surface exposure rapid shaping system. The method comprises the following concrete steps: 1, determining distribution of light irradiance of different positions on a view mask plane and corresponding positions on a picture generating a mask pattern when different values of a gray level are taken; 3, determining a target value of irradiance homogenization and establishing a mathematical model of the relationship between measurement point positions in the mask pattern and the gray scale values of corresponding points in the experimental picture generating the mask pattern based on the target value of irradiance homogenization; and 3, realizing homogenization of luminous energy in the view mask plane. The exposure energy homogenization method for the surface exposure rapid shaping system provided by the invention realizes homogenization of luminous energy in the view mask plane and improves manufacturing precision of the surface exposure rapid shaping system.

Description

technical field [0001] The invention belongs to the technical field of manufacturing methods, and relates to an exposure energy homogenization method for a surface exposure rapid prototyping system. Background technique [0002] Rapid prototyping technology is an advanced manufacturing technology. It adopts the principle of material additive molding, and can directly produce three-dimensional solid parts according to the three-dimensional CAD model of the parts. It is a new technology with great vitality. [0003] Surface exposure rapid prototyping technology is a new type of rapid prototyping technology developed in recent years. Its principle is: after the three-dimensional model of the part is sliced, the sliced ​​data is stored as a view file that can generate the cross-sectional shape of the part, and the view is driven by this file. The generator forms a corresponding view on the surface of the resin, and then uses the view as a mask to achieve selective curing of the ...

AI Technical Summary

Problems solved by technology

Due to the optical system, the light energy distribution in the actual viewing mask plane is uneven, which will lead to uneven curing depth of the resin in the curing plane, which will not only affect the dimensional accuracy of the fine features of the part, but also make the resin in the curing plane. Obvious deformation occurs in the solidification plane, which eventually leads to the loss of the precision of the part, which cannot meet the requirements of accurate prototype production

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