本研究提出新的自行車車頭燈設計，將LED光源配置於光杯側邊，利用光學反射杯將光線反射後輻射至前方目標區域。此設計概念係在特殊車頭燈架構下，垂直方向機構空間受限下，希望將光源位於側邊之特性，充分利用水平方向的結構配置空間，達到燈具輕薄化與整合化之目標。 本論文中，首先探討傳統車頭燈之設計類型與法規要求，並選用LED作為光源，進行側打式反光杯之光學設計，使用光學模擬軟體ASAP進行模擬分析。而為提升橫向之光型，設計中搭配柱狀透鏡陣列進行光型調整，以獲得均勻且符合法規要求之光型分佈。最後設計出尺寸寬20 mm、高21 mm與深為25.3 mm之側打式反光杯，並且可通過德國K-Mark法規。 由實驗結果可知，使用塑膠材質製作之反射杯易於在橫向間隙處產生雜散光。為進一步分析此現象，本研究透過觀察燈條於反射杯上的變化，於模擬中加入不同結構變化，分析燈條成像形狀之改變。隨後，再將結構變化後之模型鍵入模擬軟體，觀察10公尺處法規檢測面上的光型分布，最終模擬出與實驗相近的光型分布。 ;This thesis proposes a new design for headlight Reflector with LED located on the lateral side. The optical reflector redirects the emitted light toward the forward target area. This design concept addresses the structural limitations in the vertical direction commonly found in specialized headlamp configurations, aiming to fully utilize the available horizontal space. As a result, the proposed design achieves a more compact and integrated lighting structure. The research begins by reviewing conventional headlamp design types and relevant regulatory requirements. An LED is selected as the light source, and an optical design is developed for a side-emitting reflector cup. ASAP optical simulation software is used for analysis. To enhance the lateral light distribution, a cylindrical lens array is incorporated into the system to shape the beam, resulting in a uniform light pattern that complies with regulatory standards. Ultimately, a side-emitting reflector cup with dimensions of 20 mm (width), 21 mm (height), and 25.3 mm (depth) is designed and shown to meet the requirements of the K-Mark regulation. Experimental results reveal that reflector cups made of plastic can result in stray light in the horizontal gaps. To investigate this phenomenon, the study examines the variations in LED strip reflections within the reflector cup. Simulations with different structural modifications are conducted to analyze changes in the imaging profile of the LED strip. The modified models are then evaluated in simulation to observe the light distributions on the regulatory test surface positioned 10 meters away, ultimately simulating a light pattern distribution similar to the experimental results.
