自从机动车辆问世以来,汽车前照灯在确保道路安全方面显得非常重要。前照灯的研制工作主要围绕着改进近光。尽管目前所用的前照灯在光学方面及机械加工方面都是精制的,但其基本原理数十年来依然如故。 Since the advent of motor vehicles, headlamps have become very important in ensuring road safety. The development of headlamps mainly revolves around the improvement of low beam. Although the headlamps used today are refined both in terms of optics and machining, the rationale remains the same for decades.