Changchun Institute of Optics,Fine Mechanics and Physics,CAS
| Computation of astigmatic and trefoil figure errors and misalignments for two-mirror telescopes using nodal-aberration theory | |
| Ju, G. H.; C. X. Yan; Z. Y. Gu and H. C. Ma | |
| 2016 | |
| 发表期刊 | Applied Optics
 |
| 卷号 | 55期号:13 |
| 摘要 | This paper presents a systematic and in-depth discussion for the aberration fields of off-axis two-mirror astronomical telescopes with an offset pupil that is induced by lateral misalignment. Based on the framework of nodal aberration theory and a system level pupil coordinate transformation, the aberration function for misaligned off-axis telescopes is derived. Some general descriptions for the misalignment-induced aberrations are presented. The specific astigmatic and coma aberration field characteristics in off-axis two-mirror telescopes are then discussed. The precision of the presented aberration expressions is demonstrated. The discrepancies between the ray tracing data and aberration expressions are explicated. Then the inherent relationships between the astigmatism and coma aberration fields are revealed and explicated. Based on this knowledge, some quantitative discussions are further presented for determining the misalignments used to compensate for the effects of primary mirror astigmatic figure errors as well as separating these two effects when coupled. Other effects of lateral misalignments are also presented, especially the field-constant focal shift, which is only sensitive to the lateral misalignments in the symmetry plane of the nominal off-axis system. A quantitative discussion is also presented which explains the reason why trefoil aberration in off-axis telescopes is more sensitive to lateral misalignments. Most of the results presented in this paper can be extended to the other off-axis astronomical telescopes with more freedoms. (C) 2016 Optical Society of America |
| 文章类型 | 期刊 |
| 收录类别 | SCI ; EI |
| 语种 | 英语 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ciomp.ac.cn/handle/181722/56998 |
| 专题 | 中科院长春光机所知识产出 |
| 推荐引用方式 GB/T 7714 | Ju, G. H.,C. X. Yan,Z. Y. Gu and H. C. Ma. Computation of astigmatic and trefoil figure errors and misalignments for two-mirror telescopes using nodal-aberration theory[J]. Applied Optics,2016,55(13). |
| APA | Ju, G. H.,C. X. Yan,&Z. Y. Gu and H. C. Ma.(2016).Computation of astigmatic and trefoil figure errors and misalignments for two-mirror telescopes using nodal-aberration theory.Applied Optics,55(13). |
| MLA | Ju, G. H.,et al."Computation of astigmatic and trefoil figure errors and misalignments for two-mirror telescopes using nodal-aberration theory".Applied Optics 55.13(2016). |
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