費奈爾透鏡(Fresnel lens)無論是學術上或是在業界，皆有著相當的重要性，但是要想針對其聚焦之焦點品質進行控制的話，不是一件容易的事。首先，本論文針對不同數值孔徑以及不同厚度的Fresnel lens進行分析，以找到改善其光學效率之最佳解。 本論文於最後佐以模擬分析及實驗，得到可以有效減少雜散光的方法，且僅會造成焦點能量小幅度的下降(小於5%)，此一結果便是聚焦能力的提升。 ;Fresnel lens is of considerable importance both academically and in the industry, but it is not easy to control the quality of its focus. First, this paper analyzes Fresnel lenses with different numerical apertures and thicknesses to find the best solution to improve their optical efficiency. At the end of this paper, with simulation analysis and experiments, a method that can effectively reduce stray light is obtained, and only a small decrease in focus energy (less than 5%) is caused. This result is an improvement in focusing ability.
