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Development of the Multi-channel Photometric Survey Telescope
Yuan XY(袁祥岩); Li ZY(李正阳); Niu DS(牛冬生); Lu QS(陆启帅); Jiang FH(姜方华); Wang YF(王跃飞); Li XY(李晓燕); Liang YJ(梁永军)
Source PublicationProc. SPIE 11445
Conference Date2020-12-13
Conference PlaceCalifornia, United States
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.
KeywordOptical Telescope, Multi-channel Survey Image Quality Calibration
Subject Area天文技术与方法
Document Type会议论文
Recommended Citation
GB/T 7714
Yuan XY,Li ZY,Niu DS,et al. Development of the Multi-channel Photometric Survey Telescope[C],2020.
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