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山东大学学报(工学版) ›› 2017, Vol. 47 ›› Issue (1): 97-103.doi: 10.6040/j.issn.1672-3961.0.2016.313

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面成型3D打印工艺中投影图像畸变校正技术

贾红帅1,2,赵学进3,胡天亮2*,张承瑞1   

  1. 1. 山东大学机械工程学院, 山东 济南 250061;2. 山东大学苏州研究院, 江苏 苏州 215123;3. 中国石油大学(华东)机电工程学院, 山东 青岛 266580
  • 收稿日期:2016-08-18 出版日期:2017-02-20 发布日期:2016-08-18
  • 通讯作者: 胡天亮(1981— ),男,山东济南人,副教授,博导,主要研究方向为智能制造技术,数控技术,增材制造技术.E-mail:tlhu@sdu.edu.cn E-mail:15552569738@163.com
  • 作者简介:贾红帅(1990— ),男,山东邹平人,硕士,主要研究方向为面成型3D打印畸变校正.E-mail:15552569738@163.com
  • 基金资助:
    苏州市科技计划资助项目(SYG201446);山东省自主创新及成果转化专项资助项目(2014ZZCX04401)

Image distortion correction technology of mask image projection stereolithography

JIA Hongshuai1,2, ZHAO Xuejin3, HU Tianliang2*, ZHANG Chengrui1   

  1. 1. School of Mechanical Engineering, Shandong University, Jinan 250061, Shandong, China;
    2. Suzhou Research Institute, Shandong University, Suzhou 215123, Jiangsu, China;
    3. School of Electromechanical Engineering, China University of Petroleum, Qingdao 266580, Shandong, China
  • Received:2016-08-18 Online:2017-02-20 Published:2016-08-18

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摘要： 针对面成型工艺中视图发生器在投影时存在图像畸变的问题,提出一种畸变校正方案,通过图像处理获得投影平面像素点的实际坐标,将模型二维轮廓与像素实际坐标求交,并根据交点信息生成预畸变掩膜图像。同时在加工范围内分区域对不同位置的像素采用线性插值和双线性插值算法,对光辐照度进行均匀化处理。试验结果表明:采用本方案均匀化处理后的辐照度值,极差不超过0.4 mW/cm2,加工零件误差约为0.05 mm,能够有效控制畸变造成的影响,提高面成型工艺加工精度。

关键词: 面成型, 光固化, 畸变校正, 辐照度均匀化, 光学制造

Abstract: In order to solve image distortion problem when image was projected from image generation device in Mask-image-projection-based stereolithography, a distortion correction method was proposed. Image processing method was used to get pixel position on the projection plane. Predistortion mask image was generated by the intersection operation of 2D contours with pixel actual coordinates. Homogenization of irradiance was achieved by selecting linear interpolation algorithm and bilinear interpolation algorithm according to different pixel position on the projection plane. The experiment results showed that the difference between maximum and minimum irradiance measured value was less than 0.4×100 uW/cm2 and the size error was 0.05 mm, which showed that the designed method was effective and machining accuracy was obviously improved.

Key words: optical manufacturing, mask image projection, stereolithography, distortion correction, irradiance uniformity

中图分类号: 

  • TH161
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