立体成型中紫外光能量场的分布研究

RESEARCH ON FIELD DISTRIBUTION OF THE ULTRAVIOLET ENERGY IN STEREOLITHOGRAPHY

基于光的波动理论 ,对紫外光立体成型技术中的聚焦光能量场进行了深入的理论分析 ,阐明了点光源所辐射的连续球面波在凹椭球面上的反射聚焦理论及反射光波场轴向和侧向的能量分布形式近似于高斯分布 ;同时从实验分析角度研究得出 ,经光纤耦合传输及透镜聚焦至树脂液面的光能量也基本上呈高斯分布 ;研究为立体成型技术中有效地利用紫外点光源的辐射能和提高成型精度 ,提供了充分的理论依据 。

Based on the optical wave′s theory,the focusing energy field of the UV light in the stereolithography have been analyzed in depth.The reflect focusing theory that spherical continuous wave radiated by point light source is reflected from concave ellipsoidal surface have been enucleated and the axial and lateral optical energy distribution of the reflecting optical wave field have been showed up.The analysis indicates that distribution of the intensity in optical axis is approximately Gauss distribution.And by means of experimentation,the research educes that the optical energy being coupled by optical fiber and being focused by len is approximately Gauss distribution,too.For utilizing the UV radiant energy and improving the prototyping precision in the stereolithography effectively,the research supplies sufficient academic basis and has important guidance on the optical design of stereolithography.