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题名	形貌相关测量三维定位技术的研究
作者	孙晓鹏
学位类别	硕士
答辩日期	2015
授予单位	中国科学院上海光学精密机械研究所
导师	刘诚
关键词	光学系统，定位，相关运算，三维形貌
其他题名	3-D Positioning Methods Based on Topography Correlation Measurement
中文摘要	靶场系统作为高功率激光驱动装置的重要组成部分，其主要承担靶定位和激光瞄准等功能，是完成惯性约束核聚变(Inertial Confinement Fusion, ICF)物理实验、激光参数测量以及物理诊断测试等的重要设施，而靶定位是高功率激光驱动装置进行物理实验的关键性环节，靶定位的效率与精度都将直接影响物理实验的质量。 目前高功率激光驱动装置所采用的靶定位方法是用多个成像系统对靶放大成像，然后通过人眼进行观察和判断，并利用机械装置反复调节直到靶定位完成。由于目视判断的精度受人为因素影响较大，而且调整操作也较复杂，需要多人配合并多次操作方可完成靶定位工作，同时由于采用了较大的放大倍数，视场范围受到一定限制，大位移调整较为困难。 针对现有高功率激光驱动装置中靶定位技术的缺点与不足，本文结合频域光学相干形貌成像技术与相关测量法，提出了一种形貌相关测量三维定位技术，在理论分析的基础上，搭建了实验系统并进行了实验验证。论文的主要内容包括： 1)提出了基于形貌相关测量的三维定位方法。该方法首先利用光学相干形貌成像技术对移动前后的物体进行三维形貌成像，然后对所得到的形貌信息作相关运算，得出待测物体的三维位移量以达到定位目的。由于通过一次测量即可完成三维定位，因此大大简化了定位操作过程；同时由于其纵向分辨率与横向分辨率相互独立，可以根据实际需要分别调节。 2) 对该方法的可行性进行了理论分析的同时，搭建了光纤型的实际测试系统并开发出了控制代码。 3) 利用模拟靶对所搭建的实验系统的性能进行了离线实验验证，取得了较为理想的初步实验结果。 4) 对实验系统的误差和精度特性进行了初步的理论分析，为将来的可能实际应用指明了改进方向。
英文摘要	As an indispensable part of the high power laser drivers, the major function of target system is to guide all the high power laser beams to the target to let the physical experiment take place, and then the target positioning is a key operation for all experiments, and its efficiency and accuracy directly affects the final experimental results. The commonly used method for the target positioning is to generate an magnified image of the target with several optical systems and then observe it with naked eyes to determine whether the target is on the right position while repeatedly adjust the corresponding mechanism to move the target. It is obvious that, the accuracy of this method heavily depends on the experience of the technician and thus can’t be very high. The adjusting operation is much complicated and time consuming since several technicians should work together to realize the target positioning. Due to the high magnification of the imaging system, the view field is quite limited, leading to a small adjusting range available. To overcome these shortcomings of the currently used target positioning method, we propose a new kind of 3-D positioning technique by using the topography correlation measurement together with the Fourier domain optical coherence topography and get the following progresses: 1) A new kind of 3-D positioning technique based on the topography correlation measurement with Fourier domain optical coherence topography imaging and the topography correlation is proposed. The topography of the target is measured with Fourier domain optical coherence topography before and after the movement of the target, and then the correlation of the two topographies of target is calculated to obtain its 3-D displacement directly. Thus, the 3-D positioning can be realized with one time of calculation on two images, and the positioning procedure and the related device are remarkably simplified. At the same time, since the vertical resolution and the transverse resolution of this method are independent to each other, they can be improved separately. 2) While the feasibility of this method is discussed with theoretical analysis, an experimental system is set up and the controlling software is developed. 3) Off-line experiments are done to check the performance of the experimental setup with a simulation target, and satisfying experimental results are obtained. 4) The accuracy and the resolution of the system is analyzed theoretically to point out the direction of the future improvements on its performance.
语种	中文
内容类型	学位论文
源URL	[http://ir.siom.ac.cn/handle/181231/16948]
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	孙晓鹏. 形貌相关测量三维定位技术的研究[D]. 中国科学院上海光学精密机械研究所. 2015.

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