A light compensation method for light curing 3D printer
A 3D printer and optical compensation technology, applied in 3D object support structures, manufacturing tools, processing data acquisition/processing, etc., can solve the problems of model printing accuracy and success rate, uneven light intensity distribution, etc., to improve printing accuracy And the success rate, the effect of uniform distribution of light intensity
Active Publication Date: 2021-12-31
ZHEJIANG FLASHFORGE 3D TECH CO LTD
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Problems solved by technology
[0003] In the printing process of surface exposure printers (such as DLP, LCD, etc.), due to various reasons, the projection light intensity of the printing surface will have uneven distribution of light intensity with different intensities. This uneven light intensity distribution will affect the printing accuracy and success of the model. rate has a big impact on
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[0032] A light compensation method of photocurable 3D printer, including the following steps:
[0033] (1) Secure the camera on the printer or bracket, and the camera is kept at a certain distance to ensure that the industrial image can take the entire projection surface.
[0034] (2) Connect the 3D printer and the computer to ensure that the compensation program can control image display of 3D printer imaging display modules (such as HDMI interface, network control, etc.); connect the camera to the computer to ensure that the compensation program can accurately capture images taken by industrial camera .
[0035] (3) Make sure the light source of the 3D printer does not affect the industrial camera camera effect, and it is necessary to cover a layer of uniform light film on the 3D printer imaging display plane.
[0036] (4) Adjust the camera aperture to ensure a projection surface image that is sufficiently contracted; adjust the camera focus to ensure a sufficiently clear projec...
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The invention discloses a light compensation method for a photocuring 3D printer. A camera shoots a projected image, corrects it through a perspective transformation matrix, performs grayscale analysis on the projected image, obtains a corresponding grayscale compensation image, and passes the part with strong brightness through the grayscale Compensate the image to reduce the brightness, so as to adjust the gray level of the projected image uniformly, and iterate through multiple iterations to finally obtain a more suitable gray level compensation image, realize the uniform distribution of light intensity of the projected image, and improve the printing accuracy and success rate.
Description
Technical field [0001] The present invention belongs to the field of light curing 3D printer, and more particularly to a photocurable 3D printer optical compensation method. Background technique [0002] Photo curing rapid molding technology is a high-precision add-up manufacturing process, and the light source is illuminated in a photocurable resin according to a cross section of the three-dimensional model, and the photocurable resin is solidified by a rear layer layer accumulate, and finally constitutes a three-dimensional model entity. Some existing light curing 3D printers use LCD projection screens, which are smooth above the projection screen, and the cross-sectional layer of the desired print model is transmitted to the projection screen, the light source mounted at the bottom of the projection screen is irradiated on the projection screen, the projection screen The resin is cured in accordance with the pattern layer on the projection screen. [0003] During the printing ...
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IPC IPC(8): B29C64/124B29C64/264B29C64/393B33Y30/00B33Y50/00
CPCB29C64/124B29C64/264B29C64/393B33Y30/00B33Y50/00
Inventor 贺夫昌郑刚区宇辉裴文剑
Owner ZHEJIANG FLASHFORGE 3D TECH CO LTD