Development of the Multi-channel Photometric Survey telescope

Xiangyan Yuan; Zhengyang Li; Xiaowei Liu; Dongsheng Niu; Qishui Lu; Fanghua Jiang; Yuefei Wang; Xiaoyan Li; YongJun Liang; Hai Wang; Chao Zhang; Jinfeng Wang; Bo Li; Jie Tian; Haiping Lu; Bingqiu Chen; Yang Huang; Xiangkun Liu; Zhengqiu Yao; Xiangqun Cui; Guoping Li

doi:10.1117/12.2562334

13 December 2020 Development of the Multi-channel Photometric Survey telescope

Xiangyan Yuan, Zhengyang Li, Xiaowei Liu, Dongsheng Niu, Qishui Lu, Fanghua Jiang, Yuefei Wang, Xiaoyan Li, YongJun Liang, Hai Wang, Chao Zhang, Jinfeng Wang, Bo Li, Jie Tian, Haiping Lu, Bingqiu Chen, Yang Huang, Xiangkun Liu, Zhengqiu Yao, Xiangqun Cui, Guoping Li

Author Affiliations +

Proceedings Volume 11445, Ground-based and Airborne Telescopes VIII; 114457M (2020) https://doi.org/10.1117/12.2562334
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Abstract

The Multi-channel Photometric Survey Telescope (Mephisto) is a wide-field ground based telescope with a 1.6m primary mirror and 2° field of view, proposed by Yunnan University. The telescope will be capable of imaging the northern sky in three colors simultaneously and deliver a colored movie of the universe. The R-C system with lens corrector was adopted as the optical system considering of the image quality requirement, light obscuration and camera arrangement, in which three cubic splitters were adopted for the three channel beams in order to get satisfied image quality over the whole field of view. Dichroic coating on the cubic will lead to nonuniform efficiency on the focal plane due to the polarization problem and wide incident angle, which need calibration. The image quality represented in 80% encircled light energy is around 0.6arcsec. In order to keep the optimal image quality in any operational conditions, a 5-DOF mechanism was designed to actively adjust M2 mirror positions according to the wavefront sensors or by direct star psf. Now the telescope are under developing in Nanjing, expected to be installed at Lijiang observatory before the end of 2021.

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Xiangyan Yuan, Zhengyang Li, Xiaowei Liu, Dongsheng Niu, Qishui Lu, Fanghua Jiang, Yuefei Wang, Xiaoyan Li, YongJun Liang, Hai Wang, Chao Zhang, Jinfeng Wang, Bo Li, Jie Tian, Haiping Lu, Bingqiu Chen, Yang Huang, Xiangkun Liu, Zhengqiu Yao, Xiangqun Cui, and Guoping Li "Development of the Multi-channel Photometric Survey telescope", Proc. SPIE 11445, Ground-based and Airborne Telescopes VIII, 114457M (13 December 2020); https://doi.org/10.1117/12.2562334

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KEYWORDS

Telescopes

Image quality

Optical instrument design

Astronomical telescopes

Mirrors

Astronomical imaging

Beam splitters

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