本篇論文利用準直光的光源入射，計算光源照射預設面積所需要的偏折角度。之後找出每個偏折角度所要的入射角度，透過計算用LightTools 光學軟體設計出自由曲面透鏡。 把設計出來的自由曲面透鏡用LightTools軟體模擬在道路照明效果，分析照明結果得到光線經過自由曲面透鏡時，每個偏折角度的能量。對其能量多寡做比例分配在自由曲面透鏡偏折面的間隔比例，使其照明結果符合CIE道路照明法規標準。 ;In this thesis, we use the incident light source which is collimator light source and calculate the deflection angle for the light source when it light on the default area . After writing program to identify each deflection angle and incidence angle which is desired. By calculating with optical software LightTools, we design the freeform surface lens. The freeform lens designed with LightTools software to simulate the effect of road lighting. From the analysis results, we obtained the energy of each deflection angle when rays pass through freeform lens. We set the spacing by the proportion of energy distribution on the freeform lens. Therefore the lighting results meet CIE road lighting regulations and standards.
