高密度光盘存储的超分辨技术研究
文献类型：学位论文
| 作者 | 王海凤 |
| 学位类别 | 博士 |
| 答辩日期 | 2001 |
| 授予单位 | 中国科学院上海光学精密机械研究所 |
| 导师 | 干福熹 |
| 关键词 | 超分辨技术 焦深 高密度光存储 |
| 中文摘要 | 本文通过对超分辨技术和短波长超高密度光存储技术的研究，找出了解决影响DVR数据传输率的短焦深问题的有效方案并通过理论和实验研究，证实了该方案的正确性和可行性。包括如下几个方面：1、从理论上提出了一种新的实现超分辨方案，即将低频光转换成高频光但不提高光学系统的截止频率，从而实现分辨率的提高，并通过与纯位相型超分辨光阑的比较阐述了该方案的优越性。2、结合高密度光存储的实际情况，提出了用纯位相型超分辨光阑，并根据信息自由度理论，通过降低轴向分辨来提高径向分辨率，从而在获得超分辨的同时系统的焦深也得到了延长。3、通过对纯位相型超分辨光阑的优化，实现了光能量在光轴方向的理想化再分布，即在一定范围内沿轴向光强均匀分布，且焦深延长的倍数约为其Strehl比降低的倍数。4、实验上制作了们相型超分辨光阑，并对加光阑前后系统沿径向的光强分布以及加光阑后沿轴向的光强分布进行了测试，证实了该方法的正确性和可行性。5、通过对光学系统点扩展函数测量方法的研究，提出了用纳米扫描管带动CCD面阵进行扫描的方法来实现对光学系统点扩展函数测量的方案。6、对静态记录系统的性能进行了研究，提出了进一步减小记录点的方案。7、DVD以及相变材料的记录点进行了实验观察。8、对HD-DVD 的盘厚变化引起的球差和盘片倾斜引起的慧差以及系统所允许的盘厚变化和盘片倾斜角进行了研究。 |
| 英文摘要 | We proposed a solution to solving the problem of the short focal depth of next generation DVD through studying super-resolution technique and short wavelength high-density optical data storage. Theoretical and experimental results indicate that the proposed method is advisable. Our research include the following aspects, 1. Proposed a new approach to super-resolution, that is through moving the low frequency light to high frequency belt but not improve the cut off frequency. This method has some advantage over the pure phase apodizers that are often used to improve the resolution of optical systems. 2. Proposed to improve the radial resolution by reducing the axial resolution according to the information capacity theory, and as a result, we can gain super-resolution in the radial direction and higher focal depth in the axial direction. 3. Made the axial intensity of an optical system almost equal for a wide range near the focal point through optimizing the proposed apodizer. The fold that the focal depth is increased is about the same as the fold that the Strehl ratio is reduced. 4. Made the pure phase apodizer and tested the radial and axial intensity distribution of an optical system with and without the apodizer. The experimental results agree very well with theoretical prediction. 5. Proposed to test the point spread function of an optical system with CCD mounted onto a PZT tube through studying the point spread function test methods. 6. Studied the characteristic of the static recording system and proposed ways to minimize the recorded marks. 7. Observed marks recorded on phase change material. 8. Studied the spherical aberration introduced by the disk cover layer thickness variation and the comma aberration caused by the disk tilt. Calculated the acceptable cover layer thickness variation and disk tilt. |
| 语种 | 中文 |
| 源URL | [http://ir.siom.ac.cn/handle/181231/15367]  |
| 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 | 王海凤. 高密度光盘存储的超分辨技术研究[D]. 中国科学院上海光学精密机械研究所. 2001. |
入库方式： OAI收割
来源：上海光学精密机械研究所
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