Optical Design of the Transit Telescope for The Earth 2.0 Mission
文献类型：会议论文
| 作者 | Zhou, Dan; Zhang, Congcong; Ge, Jian; Zhang, Hui; Zhang, Yongshuai; Yu, Yong; Chen, Yonghe; Liu, Xiaohua; Song, Zongxi ; Gao, Wei
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| 出版日期 | 2022 |
| 会议日期 | 2022-07-17 |
| 会议地点 | Montreal, CANADA |
| 关键词 | telescope transit optical design EE90% |
| 卷号 | 12180 |
| DOI | 10.1117/12.2630673 |
| 英文摘要 | The Earth 2.0 (ET) mission is a Chinese next-generation space mission aiming at detecting thousands of terrestrial-like planets, including habitable Earth-like planets orbiting solar type stars (i.e., Earth's 2.0s), cold low-mass planets, and free-floating planets. The ET mission will use six 300 mm diameter wide field telescope arrays to continuously monitor 1.2 million FGKM dwarf stars in the original Kepler field and its adjacent regions for four consecutive years to search for new planets including Earth 2.0s using the transit technique. The six telescopes have the same configuration, point to the same sky area, and constitute the main scientific payload. Each telescope has an effective aperture of 300 mm with a very wide field of view (FOV) of 500 square degrees and a wavelength coverage of 450-900 nm. Each telescope is equipped with a focal plane mosaic camera. The mosaic camera is composed of 2x2, 9kx9k CMOS detectors with pixel size of 10 mu m. The optical design results in the diameter of the 90% encircled energy (EE90%) less than 40 mu m (or 4 pixels) over the entire FOV. About 20% vignetting at the edge of the FOV is introduced to provide good throughput for the entire FOV while keeping optics size and weight down to reduce manufacturing risk and scientific payload within the mass and volume limit. In this paper, we will present the optical design details, including influence analysis of various factors on image quality, e.g., glass material, detector flatness, manufacturing and assembly tolerances. In addition, we will describe temperature stability analysis of the telescope on image quality and photometry measurements. |
| 产权排序 | 3 |
| 会议录 | SPACE TELESCOPES AND INSTRUMENTATION 2022: OPTICAL, INFRARED, AND MILLIMETER WAVE
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| 会议录出版者 | SPIE-INT SOC OPTICAL ENGINEERING |
| 语种 | 英语 |
| ISSN号 | 0277-786X;1996-756X |
| ISBN号 | 978-1-5106-5342-9 |
| WOS记录号 | WOS:000865466600037 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/96225]  |
| 专题 | 西安光学精密机械研究所_空间光学应用研究室 |
| 推荐引用方式 GB/T 7714 | Zhou, Dan,Zhang, Congcong,Ge, Jian,et al. Optical Design of the Transit Telescope for The Earth 2.0 Mission[C]. 见:. Montreal, CANADA. 2022-07-17. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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