紫外光快速成型中辐射能的汇聚分析

基于光的波动理论，对紫外光快速成型技术中的聚焦光有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波在凹椭球面上的反射聚焦理论，及其反射光波场轴向和侧向的能量分布形式，理论分析表明，焦点光强随偏心率增加而上升，轴上的光强分布曲线近似于高斯曲线，在聚焦点域的能量分布呈双曲面体形式，焦平面中强度侧向分布曲线服从正态分布，研究为在快速成型技术中有效地利用紫外点光源的辐射能提供了充分的理论依据。同时对紫外光快速成型的实际光学系统的设计具有重要的指导作用。

Analysis on Radiant Energy Centralization in the Ultraviolet Stereolithography

Based on the optical wave theory, the focusing energy field of the ultraviolet light in the stereolithography is analyzed. The reflect focusing theory that spherical continuous wave radiated by point light source is reflected from concave ellipsoidal surface is enucleated, and the axial and lateral optical energy distributions of the reflecting optical wave field are shown up. The analysis indicates that the intensity of the focus rises with the eccentricity increasing; the distributing curve of the intensity along optical axis is approximate Gauss curve; the distribution of the optical energy presents hyperboloidal body form in the focal field; the side distributing curve of the intensity submits to normal distribution in the focal plane. For utilizing the ultraviolet radiant energy in the stereolithography effectively, the research supplies theoretical basis and important guidance for the optical design of stereolithography.