Design of a Dynamic Secondary Mirror Truss Adjustment Mechanism for Large Aperture Telescopes
Source abstract
Abstract
This study focuses on the dynamic secondary mirror truss adjustment mechanism for large aperture telescopes. The relative positions between the primary and secondary mirrors have stringent requirements for large aperture optical telescopes, with an aperture of more than 2 m. Due to the large mass of the primary mirror, the secondary mirror system is designed as an adjustable mechanism with multiple degrees of freedom, dramatically impacting telescope imaging. The kinematic modeling is followed by a detailed description of the designed adjustment mechanism, and then a static and modal analysis of the designed mechanism is performed. Subsequently, a kinematic performance test of the experimental prototype is conducted. The developed mechanism can travel up to ±5 mm in the z-direction with an accuracy of 16 µm and deflection of ±0.574° in the xy-direction. It provides accuracy better than 6.4 arcseconds.
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Research context
OpenAlex topics: Adaptive optics and wavefront sensing · Superconducting and THz Device Technology · Optical Systems and Laser Technology
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
University of Chinese Academy of Sciences, Beijing 100049, China
Funding
The Jilin Science and Technology Development Program · Excellent Member of Youth Innovation Promotion Association CAS · International Partnership Program of the Chinese Academy of Sciences · National Natural Science Foundation of China (NSFC) · National Key R&D Program of China
References (17)
Show source-provided references
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