Knowledge Management System Of Institute of optics and electronics, CAS
大口径望远镜的像差检测技术研究 | |
曹宇泽 | |
Subtype | 硕士 |
2019-05-23 | |
Degree Grantor | 中国科学院大学 |
Place of Conferral | 光电技术研究所 |
Degree Name | 工学硕士 |
Keyword | 大口径望远镜,卡塞格林系统,曲率传感器,灵敏度矩阵法,像差检测,像差校正 |
Abstract | 地基大口径望远镜在观测的过程中,成像质量会受到镜面失调误差的影响。镜面失调误差会导致望远镜的成像质量下降、观测精度降低,使望远镜无法达到技术指标,无法准确的观测天体和空间碎片。因此,需要采用像差检测技术对望远镜的像差进行检测,并通过像差校正方法来减小镜面失调量,使望远镜处于最佳的工作状态。 本文的研究对象是2.5米口径、3°视场的主焦望远镜,希望能采用一种无需额外添加光学元件的像差检测方法,通过相应的校正方法校正光学元件的失调误差。具体工作如下:
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Other Abstract | The imaging quality of ground-based large-aperture telescopes is affected by mirror misalignment errors during observation. The mirror misalignment error will lead to the decline of imaging quality and observation accuracy of the telescope, which makes it impossible for the telescope to reach the technical targets and to observe celestial bodies and space debris accurately. Therefore, aberration detection technology is needed to detect the aberration of the telescope, and aberration correction method is used to reduce the mirror misalignment, so that the telescope is in the best working state. The object of this paper is a catadioptric telescope with 2.5m aperture and 3 degree field of view. It is hoped that an aberration detection method without additional optical elements can be used to correct the misalignment error of optical elements by corresponding correction methods. The specific work is as follows: 1.The aberration detection method of split curvature sensor is studied. Because of the space limitation inside the telescope, it is impossible to add additional optical elements in the optical system. Therefore, the traditional curvature sensor method which needs to add spectroscopic elements is no longer applicable. The method of curvature sensor is improved. The split curvature sensor can be used to detect the curvature only by splicing CCD. The problem of space limitation in large aperture telescope is solved. 2.The Cassegrain system with 300 mm aperture and 0.6 degree field of view is designed to verify whether the aberration correction method can be applied to different kinds of optical systems. 3.The aberration correction method of two-step sensitivity matrix method is studied. The accuracy of traditional sensitivity matrix method is low. The correction accuracy is improved by improving the calculation method of sensitivity function, the selection principle of Zernike coefficient and the number of times of correction. The two-step sensitivity matrix method is used to correct the Cassegrain system and the optical system with 2.5m aperture and 3 degree field of view. It is proved that the two-step sensitivity matrix method can solve the correction of mirror misalignment. The problem has sufficient accuracy. |
MOST Discipline Catalogue | 工学::仪器科学与技术 |
Language | 中文 |
Document Type | 学位论文 |
Identifier | http://ir.ioe.ac.cn/handle/181551/9098 |
Collection | 光电技术研究所博硕士论文 |
Corresponding Author | 曹宇泽 |
Recommended Citation GB/T 7714 | 曹宇泽. 大口径望远镜的像差检测技术研究[D]. 光电技术研究所. 中国科学院大学,2019. |
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大口径望远镜的像差检测技术研究.pdf(2467KB) | 学位论文 | 开放获取 | CC BY-NC-SA | Application Full Text |
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