光学读取头的研究
文献类型：学位论文
| 作者 | 陈丹 |
| 学位类别 | 硕士 |
| 答辩日期 | 2004 |
| 授予单位 | 中国科学院上海光学精密机械研究所 |
| 导师 | 阮昊 |
| 关键词 | 光学读取头 光学设计 |
| 其他题名 | Research on optical pick-up |
| 中文摘要 | 光学读取头是光盘机中的关键部件，信息的写入和读出都是通过光学读取头来完成的，对光盘机的技术性能具有决定性的影响。小型多功能光学读取头的出现，必将进一步推动光盘存储技术的发展。本论文在了解了DVD光学成像系统的原理和基本结构之后，对整个系统的光路进行光学设计。应用光学设计软件ZEMAX，设计出了满足成像要求的DVD光学成像系统。本论文的主要成果如下：1．为了补偿双波长光学读取头由于两种光盘的盘基厚度不同所产生的球差，通过理论分析和计算，设计出了一种波长选择滤波器，它能够对不同波长的透射光的相位分布进行改变，从而减小球差和控制NAO此种类型不仅适用于读出光盘系统，而且由于它的高光能利用率和宽视场特性，可适用于记录和擦写光盘系统。2．在了解了DVD光学成像系统的原理和基本结构之后，分析计算出系统的初始结构参数，应用光学设计软件ZEMAX对初始结构进行优化，通过其分析功能对系统进行评价，直至达到系统的成像要求。经过计算机优化一系统分析一微调参数一改变参数变量一再次进行优化，反复的过程之后，设计出了令人满意的DVD光学成像系统。3．对DVD光学成像系统的关键元件一物镜，进行光学设计。设计出了能够很好的消除系统像差的非球面物镜，使得成像光斑达到了衍射极限。从而不仅能很好的读取光盘信息，而且大大简化了系统的结构，符合光学读取头的未来发展趋势，为今后蓝光读写头物镜的设计奠定了基础。4．归纳总结了HD-DVD光学系统物镜设计的要求及方法，对几类设计方案及光学性能做了类比，最后总结了对不同系统要求的设计方法，为今后蓝光光学头的设计奠定了基础。5．对CD光学头实验进行归纳总结，提出了一些可行的实验方法，将理论和实际紧密联系起来，对参数的理解和实验数据的分析具有很好的指导作用。该课题对于我国光存储领域中的高密度光学读取头的研究具有现实的指导意义。 |
| 英文摘要 | Optical pick-up is the key unit in the optical disc driver. The write-in and read-out of information are fulfilled by optical pick-up, and it has critical effects on the technical characteristics of optical disc' driver. Appearance of compact multifunction optical pick-up will further push the development of optical disc storage forward inevitably. In this thesis, after knowing about the theory and basic structure of the DVD optical imaging system, we did optical design on optical path of the system. With the use of optical design software ZEMAX, we designed the DVD optical imaging system which meets the requirements of imaging. The achievements of this thesis are stated as following: 1. To compensate for the spherical aberration that is due to the difference in substrate thicknesses, by theoretical analysis and calculation, we designed a wavelength-selective filter, which changes the phase distribution of the transmitted light according to the wavelength, reduces the spherical aberration and controls the NA. This type is most suitable not only for read-only but also for recordable or rewritable optical disk systems, because of its high light power efficiency and wide image field characteristics. 2. After knowing about the principle and basic structure of the DVD optical imaging system, we analyze and calculate the initial structural parameters, apply optical design software ZEMAX to optimize the initial structure, and use its analysis function to evaluate the system, until it meets the equirements of system's imaging. By computer optimization→ system analysis→ fine changing parameters→ changing parametric variable→ optimization again, for these repetition processes, we designed a satisfying DVD optical imaging system. 3. As the key element of DVD optical imaging system-objective lens, we did optical design on it. We designed aspheric objective lens which eliminated aberrations of the system perfectly and made the imaging spot reaching diffraction limit. So it can not only read information of the disc but also simplify the structure of the system greatly, and meets the development trend of optical pick-up, and makes foundation for the design of the objective lens of coming blue-ray optical pick-up. 4. We summarized objective lens design's requirements and methods of HD-DVD optical system, and compared some kinds of design schemes and optical performance, at last, we generalized different design methods for different system requirements, and which can make foundation for the design of blue-ray optical pick-up in the future. 5. We summarized the experiments of CD optical pick-up, and brought forward some feasible experimental methods, which contacted theory with fact tightly. The methods have perfect direction effects on comprehension of parameters and data . analysis of experiments. This project has realization effects on the high density optical pick-up in optical storage field of our country. |
| 语种 | 中文 |
| 源URL | [http://ir.siom.ac.cn/handle/181231/16559]  |
| 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 | 陈丹. 光学读取头的研究[D]. 中国科学院上海光学精密机械研究所. 2004. |
入库方式： OAI收割
来源：上海光学精密机械研究所
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