Paper 14145-19
Paper 14145-19
Optical alignment and opto-mechanical integration of the China Space Station Telescope (CSST) optical telescope element
5 July 2026 • 17:00 - 17:20 CEST | Room B4-M3
Abstract
The Chinese Space Station Telescope (CSST) is a space-based observatory equipped with a 2-meter astronomical telescope. It is scheduled for launch in 2027. The Optical Telescope Element (OTE) of the CSST is a 2m off-axis three-mirror anastigmat optical system, whose field of view (FOV) is 1.1°×1°. The optical alignment poses a key difficulty for the OTE, due to the combination of non-parallel optical axes of all the three mirrors and the use of a freeform surface for the tertiary mirror. Whole-process deterministic optical alignment has been achieved successfully. The 2-meter-diameter primary mirror and the 4-meter main substrate were integrated with high precision, achieving an angular error of less than 10 arcseconds and a positional error under 0.05 mm. After integration and alignment, the OTE was tested in a vacuum chamber. The average RMS wavefront error over full FOVs was measured to be 0.074λ at 632.8 nm.
Presenter
Changchun Institute of Optics, Fine Mechanics and Physics (China)
Dr. Luo Jing earned his PhD in 2018 from the College of Optoelectronic Science and Engineering at Zhejiang University. He currently serves as an associate professor at the Changchun Institute of Optics, Fine Mechanics and Physics (CIOMP) under the Chinese Academy of Sciences. His research focuses on space optics and polarization optics.
Dr. Luo is actively involved in the development of the Chinese Space Station Telescope (CSST), which will mark China's first space-based astronomical telescope. The CSST features a 2-meter diameter off-axis three-mirror reflective optical system. In this project, he holds the position of Technical Director for the optical telescope alignment. He has authored approximately 20 scientific papers, which have been published in renowned journals such as Optics Letters, Optics Express, and Applied Optics.