单层BD碟片容量为25GB、双层为50GB,基本上可以满足完全高清节目的记录播放。但是随着3D技术和互动技术的介入以及超大容量数据存储需求的增长,目前的BD标准将面临挑战。本文以工程实践的角度介绍了3种BD碟片的物理结构,并以此为基础,结合当前光存储领域的最新技术,从存储密度和数据传输率两方面展望了BD技术的发展趋势。 Single-layer BD disc capacity of 25GB, double 50GB, basically to meet the full HD recording of the program. But with the involvement of 3D technologies and interactive technologies and the growing demand for very large-capacity data storage, the current BD standards will be challenged. In this paper, the physical structure of three kinds of BD discs is introduced from the perspective of engineering practice. Based on this, combined with the latest technologies in the field of optical storage, the development trend of BD technology is prospected from two aspects: storage density and data transmission rate.