Method for homogenizing DLP exposure energy

Abstract

The invention provides a method for homogenizing DLP exposure energy. The method includes the following steps that step 1, in data sampling, an exposure energy correcting picture is obtained, and light energy determining equipment is utilized for measuring a light energy value of a sampling point on a picture sample; step 2, in data processing, surface fitting processing is performed on the energy value of the sampling point, and statistics is performed on exposure energy corresponding to all pixel points of the picture; step 3, in the process of obtaining an exposure switching picture, an exposure switching picture set VIMG is generated; step 4, in picture exposure operation, time lengths of exposure time of all the pixel points are adjusted. Direct operation on energy is avoided, and the energy is homogenized easily, conveniently and rapidly through adjusting exposure time; the problem that because of an optical machine or lens or other hardware, exposure energy is not homogenized is solved, the manufacturing precision of a DLP face exposure rapid forming system is improved, the yield of the DLP face exposure rapid forming system is increased, an even printing effect under a full format is achieved, the yield of the system is greatly increased, the manufacturing precision of the DLP rapid forming system is improved, and the yield of the DLP rapid forming system is increased.

Description

technical field [0001] The invention belongs to the field of additive manufacturing or 3D printing, and in particular relates to a method for uniformizing exposure energy on a DLP surface. Background technique [0002] DLP (DigitalLightProcession, digital light processing) technology, its principle is: first project the image signal to the DMD chip (DigitalMicromirrorDevice) for digital processing, and then project the light out. The DLP surface exposure rapid prototyping system is based on DLP technology, which uses a certain wavelength of ultraviolet light to irradiate the photosensitive resin, so that the resin is cured and stacked layer by layer. The exposure format of the DLP surface determines the forming range of the system. Due to the influence of the optical path design of the optical machine or the lens and the precision of the mechanical manufacturing, the energy of each position of the format is not consistent during the full-format exposure, and the energy gap o...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method to solve the problem of uneven exposure energy caused by the deviation of the optical path system, improve the manufacturing accuracy and yield rate of the DLP surface exposure rapid prototyping system, and DLP exposure energy homogenization method

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