Changchun Institute of Optics,Fine Mechanics and Physics,CAS
Application of modified sensitivity matrix method in alignment of off-axis telescope | |
Gu, Z.-Y.; C.-X. Yan; X.-B. Li; C.-H. Hu and Y. Wang | |
2015 | |
发表期刊 | Guangxue Jingmi Gongcheng/Optics and Precision Engineering |
卷号 | 23期号:9页码:2595-2604 |
摘要 | To calculate the misalignments of optical elements accurately in an off-axis Mersenne afocal Cassegrain telescope, a computer-aided alignment method based on modified sensitivity matrix model was proposed. The principle and limitations of conventional sensitivity matrix method were analyzed. By means of adding a quadratic correction term to conventional sensitivity matrix model, the conventional computer-aided alignment technology was improved. For the off-axis telescope, the aberration characteristics were analyzed when the secondary mirror was misaligned. The modified model and conventional model were used to approximate the mapping relationships between misalignments and aberrations. Then the alignment of misaligned telescope was simulated. The simulation results in the range of decenter 8 mm and tilt 1.5 for a secondary mirror show that the root mean square error of x-, y-, z-decenters and -, -tilts of the secondary mirror calculated by conventional method are 2.689 mm, 2.494 mm, 0.194 mm and 0.500, 0.525 respectively, and the corresponding calculations by modified method are 0.404 mm, 0.323 mm, 0.047 mm and 0.064, 0.065 respectively. The calculation accuracy of the modified sensitivity matrix method is much higher than that of the conventional method. Finally, the telescope is well aligned with the modified method, and the results give that the Wavefront Errors (WFEs) RMS on axis is 0.056(=632.8 nm), while the WFEs RMS (Root Mean Square) in marginal field of view are better than 0.1. The results meet the design requirements. , 2015, Chinese Academy of Sciences. All right reserved. |
文章类型 | 期刊论文 |
收录类别 | EI |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ciomp.ac.cn/handle/181722/56034 |
专题 | 中科院长春光机所知识产出 |
推荐引用方式 GB/T 7714 | Gu, Z.-Y.,C.-X. Yan,X.-B. Li,et al. Application of modified sensitivity matrix method in alignment of off-axis telescope[J]. Guangxue Jingmi Gongcheng/Optics and Precision Engineering,2015,23(9):2595-2604. |
APA | Gu, Z.-Y.,C.-X. Yan,X.-B. Li,&C.-H. Hu and Y. Wang.(2015).Application of modified sensitivity matrix method in alignment of off-axis telescope.Guangxue Jingmi Gongcheng/Optics and Precision Engineering,23(9),2595-2604. |
MLA | Gu, Z.-Y.,et al."Application of modified sensitivity matrix method in alignment of off-axis telescope".Guangxue Jingmi Gongcheng/Optics and Precision Engineering 23.9(2015):2595-2604. |
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