HD-DVD光学系统物镜的设计与研究进展

对于下一代光盘系统而言，GaN激光器和高数值孔径（NA）的物镜是关键组件。本文介绍了几种HD-DVD光学系统物镜的设计方案，并对其进行比较研究，发现要根据不同的要求来设计物镜，对像差要求高的要采用两元件型或者三元件型物镜；而对于要求结构简单、装配容易、工作距离大的光学头，要采用单元型物镜。在解决其与CD和DVD的兼容性问题时，可采用物镜前插入补偿装置来控制物镜的数值孔径。

Progress in Design and Study of Objective Lens Used in HD-DVD Optical Systems

In the next generation of optical disk system,GaN laser and high numerical aperture(NA)objective lens are two key components.This paper describes some design ways of objective lens for HD-DVD optical system,and through comparison we find that we should design objective lens according to different requirements.For diminishing aberration we should apply two -element objective lens,and for compact design,easy assembly and wide working distance we should apply single -element objective lens.When solving the compatibility with CD and DVD,we set a compensator before the objective lens to control NA of it.