超分辨光瞳滤波器在红光高清存储中的应用研究
文献类型：学位论文
| 作者 | 曹由由 |
| 学位类别 | 硕士 |
| 答辩日期 | 2007 |
| 授予单位 | 中国科学院上海光学精密机械研究所 |
| 导师 | 周常河 |
| 关键词 | 超分辨光瞳滤波器 红光高清存储 光学读取头 母盘刻录 |
| 其他题名 | Study on Red Laser High Definition Storage with Superresolution Pupil Filter |
| 中文摘要 | 随着信息技术的发展，尤其是数字高清电视的出现，人们对海量信息存储的需求日益增长。对我国光盘产业而言，赶在数字高清电视还未普及、下一代光存储技术标准尚未出台之前，发展拥有自主知识产权的光盘技术是至关重要的。新的光盘技术必须改变目前传统的光盘物理格式，采用激光波长635-650nm，数值孔径为0.6-0.65的聚焦物镜实现与蓝光光盘容量相当的高密度光存储。 本论文主要研究利用光学超分辨手段，即在光路中加入超分辨光瞳滤波器的方法来实现红光高清存储的技术方案。光学超分辨方法能突破衍射极限，有效的压缩光斑，而且压缩效果与激光波长无关。另外，超分辨光瞳滤波器具有结构简单，成本低廉，易于大规模制造的优点，非常适合应用于光存储系统中。 针对超分辨光瞳滤波器在红光高清光学读取头中的应用，我们提出了两种不同的应用方案以避免普通超分辨光瞳滤波器旁瓣强度过大造成信号串扰的缺点：一是严格控制旁瓣强度小于主瓣能量的10%，这通常被认为是一般光学系统可以接受的最高旁瓣能量。另一个是优化设计超分辨光瞳滤波器，压缩第一旁瓣使其与主瓣的强度比值等于爱里斑的相应比值，同时在信号接收处配合电子滤波器以滤去外移的最高旁瓣，避免其对信号的干扰。针对这两种方案我们分别设计了最优化的超分辨光瞳滤波器结构，并对其焦深和光能利用效率进行了计算分析。 针对超分辨光瞳滤波器在红光高清超分辨母盘刻录系统中的应用，由于记录介质具有能量阈值特性，可以容忍较高的旁瓣能量，因此我们把优化设计目标定为满足约束第一零点比G等于0.8，最高旁瓣强度不大于主瓣强度30%的最大斯特尔比。针对这一优化目标，给出了最终的优化设计结果并分析了其焦深和光能利用效率，指出了其在红光高清存储中的应用前景。 |
| 英文摘要 | With the development of information technology, especially the high definition TV (HDTV) technology, the corresponding need for huge volume information storage is growing rapidly. As for optical storage industry in China, it is important to develop a new technology, which we own the intellectual property rights ourselves, before HDTV is widely applied and the next generation optical storage standard is formed. The new optical storage system should not use the traditional physical format but with the wavelength 635-650nm laser and the NA 0.6-0.65 objective lens to achieve a capacity comparable to that of blue disk. We mainly focused on Red Laser High Definition (RLHD) optical storage using optical superresolution method, which means inserting of a superresolution pupil filter in optical path. This method can overcome the diffraction limit and reduce the spot size whatever the wavelength is. Superresolution pupil filter is suitable to be applied in optical storage system with advantages of simple structure, low cost and easy mass production. As for applying superresolution pupil filter in the RLHD optical pick-up head, we proposed two different designs to overcome the disadvantage of high sidelobe intensity which may cause cross talk. One is that we optimized the superresolution pupil filter with ratio of sidelobe intensity to mainlobe intensity to be smaller than 10%, which is considered as the highest acceptable sidelobe intensity for general optical systems. The other is that we optimized a superresolution pupil filter with the ratio of first sidelobe intensity to mainlobe intensity equal to that of Airy spot, at the meantime using an electronic filter to filter out higher sidelobe in order to avoid interference. We also studied the focal depth and the efficiency at the optimized situation. As for applying superresolution pupil filter in the RLHD master recording system, because the recording medium has an energy threshold and high toleration sidelobe intensity, we proposed another optimized target with the biggest S under the constraints M no larger than 0.3 and G=0.8. We obtained the optimized result, the focal depth and efficiency. We also pointed out that it is attractive to use the filter in RLHD disk mastering in the future. |
| 语种 | 中文 |
| 源URL | [http://ir.siom.ac.cn/handle/181231/16643]  |
| 专题 | 上海光学精密机械研究所_学位论文 |
| 推荐引用方式 GB/T 7714 | 曹由由. 超分辨光瞳滤波器在红光高清存储中的应用研究[D]. 中国科学院上海光学精密机械研究所. 2007. |
入库方式： OAI收割
来源：上海光学精密机械研究所
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