Mr. Rongguang Dong Profile

Rongguang Dong

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Proceedings Article | 24 January 2019 Paper

Modeling and analysis of image rotation for the AIMS solar optical telescope

Yinbing Gong, Yongjun Xie, Rongguang Dong, Xianglong Mao, Tao Zhang, Songbo Xu

Proceedings Volume 11052, 1105207 (2019) https://doi.org/10.1117/12.2520199

KEYWORDS: Mirrors, Telescopes, Image analysis, Solar telescopes, Sun, Stars, Optical telescopes, Optical mounts, Spherical lenses, Dynamical systems

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The AIMS, a solar telescope with a primary mirror of 1m in diameter, is designed with an off-axis Gregorian optical system and an alt-az mounting structure. The image rotation of the AIMS will be produced both due to alt-az mounting and the movement of plane mirrors system during the monitoring of the sun. Therefore, a derotator is planned to correct and compensate the image rotation to make the terminal instruments of the AIMS work properly. The image rotation in astronomical telescopes consists of the object field rotation and the image field rotations. In this paper, the rotation of the object field for the AIMS is presented and calculated. The image field rotation due to the plane mirrors system with the movement of azimuth axis and altitude axis of the AIMS is theoretically determined by using the ray tracing and vector matrix method. The relationships between the image filed rotation and the variation of the azimuth and altitude of the telescope are discussed. This work may be very helpful to evaluate the deroation methods for the AIMS and will provide an important theoretical support for precision control of the derotator to eliminate the image rotation in real time.

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