摘要
针对双光子光存储系统的单光束聚焦扫描方式 ,建立了一种离散的衍射光斑计算模型 ,并实现了计算机仿真计算 .与传统计算方法相比 ,克服了“菲涅尔近似”或“夫朗和费近似”的限制 ,且对于大数值孔径物镜的情况也有效 .实验结果表明 ,该模型可以快速实现存储介质内部不同记录层面上双光子记录信号强度分布的仿真计算 .
The two photon processes based optical storage is one of the most promising three dimensional technologies for increasing the capacity of data storage. In order to compute the diffraction patterns within the storage medium produced by a single beam two photon recording system, we have set up a mathematical model by using the techniques of ray tracing and amplitude combination. This model gets rid of the limitation in Fresnel or Fraunhofer approximations. So it is valid for the objective lens with a large numerical aperture. The numerical simulation results in this paper show that our model can rapidly compute the intensity distribution in different recoding planes in a storage medium.
出处
《计算机辅助设计与图形学学报》
EI
CSCD
北大核心
2001年第5期473-476,共4页
Journal of Computer-Aided Design & Computer Graphics
基金
中国博士后科学基金项目!(中博基 [2 0 0 0 ] 2 3 )
国家"九七三"项目!"超高密度
超快速度信息存储和处理基础研究"( G19990 3 3
关键词
衍射光斑
双光子光存储系统
扫描信号
强度分布
计算机模拟
optical storage, two photon storage, diffraction pattern, ray tracing, numerical simulation