本論文主要為優化手機閃光燈之複合透鏡的光學設計，其中改良方式是將傳統菲涅耳透鏡方式所設計之折射型閃光燈透鏡加以改良，使其變成菲涅耳加上全內反射所構成的複合式透鏡，此優化能夠有效的提升閃光燈之光學效率以及目標區域的照度與均勻度。 在此研究中，我們先探討各種閃光燈的設計優劣，再從中歸納出目前手機閃光燈最理想的設計方式為複合式透鏡，接著分析複合式透鏡的相關文獻資料，隨後提出我們的設計概念及方法，由模擬結果得知此設計方式能將光學有效利用率提升 1.3 倍、中心照度提升 1.19倍、 0.7 視場平均照度度提升 1.32 倍， 1.0 視場平均照度提升 3.65 倍。最後，我們使用超精密加工搭配射出成型將閃光燈透鏡製作出來進行實驗量測，並將量測結果與模擬值做比對分析，其實驗與模擬的各項光學性能之誤差值皆有小於 4.26% 的水準。 ;In this thesis, we mainly optimize the optical design of the compound flash light of the mobile phone. The proposed compound lens consists of a Fresnel lens and total internal reflection structure. This optimized lens can effectively improve the optical efficiency of the flash light, and the illuminance and uniformity of the target region. In this study, we first discuss the design advantages and disadvantages of various flash light, and then conclude that the most ideal design method for the flash light of the mobile phone is the use of the compound lens. After the analyses of the relevant literature of the compound lens, we propose our design concepts and methods about the proposed compound lens. According to the simulation results, this design method can increase the optical utilization factor by 1.3 times and the center illuminance by 1.19 times. The average illuminance of 0.7 field and 1.0 field can be respectively increased by 1.32 times and 3.65 times. Finally, we made the designed flash lens and measured the optical performance. Compared with the simulation results, the error of the ecperiment results are all less than 4.26%.
