本文首先介绍了影碟机激光头的工作原理，然后根据激光二极管的发光特性及刻录在光盘上表示信息的坑槽的细微结构，提出了使激光头物镜满足工作需求的光学设计要求。在非球面物镜的总体设计阶段，对物镜的焦距、口径等系统性能参数进行了确定，并针对系统要求提出需校正的像差种类。在非球面物镜的光学设计阶段，以总体设计的初始结构数据为基础，利用计算机进行非球面物镜的设计和优化，得到了满足各项要求的设计结果。文中给出了所设计的非球面物镜结构参数及像差曲线，并就该塑料镜片的工艺性进行了初步讨论 In this paper, the working principle of the laser head of the DVD player is introduced firstly. Then the optical design requirements of the laser head objective to meet the working requirements are proposed according to the light emitting characteristics of the laser diode and the fine structure of the pit for recording information on the optical disc. In the whole design phase of aspheric lens, the system performance parameters such as the focal length and aperture of the objective lens are determined, and the types of aberrations to be corrected are put forward according to the system requirements. In the stage of optical design of aspheric objective lens, based on the initial design data of the overall design, the design and optimization of the aspheric objective lens are carried out by computer, and the design results that meet various requirements are obtained. The design parameters and aberration curves of aspherical lens are given in this paper, and the preliminary discussion on the process of the plastic lens