用于蓝宝石长时光盘的光学信息读取系统  

Read-out system for long-term optical sapphire discs

作　　者：付明磊[1,2] 徐武超 乐孜纯[1,2] V VPetrov A S Lapchuk I V Gorbov M D Yu I V Kosyak 

机构地区：[1]浙江工业大学理学院,浙江杭州310023 [2]浙江工业大学义乌科学技术研究院,浙江义乌322001 [3]乌克兰国家科学院信息记录研究所,乌克兰基辅03113

出　　处：《光学仪器》2016年第6期529-533,共5页Optical Instruments

基　　金：国家高端外国专家项目(GDT20153300054);浙江省公益性技术应用研究计划(2015C34011)

摘　　要：蓝宝石材料具有高度力学和化学稳定性,因此以蓝宝石作为衬底的光盘是实现长时数据存储的有效解决方案。但是,由于单晶蓝宝石材料具有明显的各向异性,当扫描光束入射到单晶蓝宝石基底表面时会发生双折射,从而使标准的CD读取系统对蓝宝石光盘失效。针对蓝宝石材料这一特性,建立了光束在单晶蓝宝石衬底中传输的物理模型,提出采用石英补偿板来补偿蓝宝石衬底像差的补偿机制。进行了数据读取实验,结果表明,采用所述像差补偿方法能够显著提高蓝宝石光盘光学信息读取系统的读取性能。An optical disc using sapphire substrate is considered as an effective solution for achieving long-term data storage attributing to its high mechanical and chemical stability. The birefringence in single crystal sapphire causes optical aberration which makes failure occur during reading information from the disc. The propagation of the focused laser beam throughout a sapphire disc has been analyzed. The method of compensating aberrations resulting from reading data from a uniaxial birefringent medium is developed by using a quartz compensating plate. A data reading experiment is conducted. The results show that the proposed aberration compensation method significantly improves the performance of information reading system for sapphire discs.

关 键 词：光学数据存储 蓝宝石光盘 长时数据存储 像差补偿 

分 类 号：TN249[电子电信—物理电子学]