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引言用光学方法在涂有记录介质薄膜的圆盘上记录和读出信息是一项十分吸引人的课题。本文将重点分析和讨论有关光盘存贮技术中对光学系统物镜的要求及其象差校正。对于高密度记录和读出信息的光学头,要求物镜聚焦到光盘上的光斑大小在零点几微米的量级,镜头的成象质量要求达到衍射极限。对这种要同时考虑几何象差和衍射效应的物镜,采用波差进行设计是很合理的,一般用斯特列尔(strehl)
Introduction Optical recording and reading of information on discs coated with a thin film of recording media is an intriguing subject. This article will focus on analyzing and discussing the requirements and aberration correction of optical system objectives in optical disc storage technology. For high-density optical pickups that read and write information, the spot size that the objective lens needs to focus on the optical disk is on the order of a few tenths of a millimeter and the imaging quality of the lens is required to reach the diffraction limit. It is reasonable to use wavefront design for such an objective lens that takes both geometrical aberrations and diffraction effects into account, generally using strehl