Translator Disclaimer
10 October 2007 Parallel robots in a ground-based telescope active optics system: theory and experiments
Author Affiliations +
Proceedings Volume 6715, Optomechatronic Actuators and Manipulation III; 671503 (2007) https://doi.org/10.1117/12.754172
Event: International Symposium on Optomechatronic Technologies, 2007, Lausanne, Switzerland
Abstract
This work deals with the application of parallel robots for the correction of defocus and coma optical aberrations in the case study of the VST (VLT Survey Telescope) telescope, to be installed at the ESO observatory of Cerro Paranal (Chile). The parallel robots are used to change position and orientation of the secondary mirror. The secondary mirror positioning capability is a fundamental part in an active optics system, i.e. a closed loop control system for the minimization of the telescope optical aberrations, where the outer optical feedback coming from the wavefront sensor is used to generate references for the inner motion control loop of the secondary mirror positioning robots. Two devices are presented: a 6-6 Stewart platform where both fixed and mobile platforms are regular and similar hexagons whose vertexes belong to the same plane and are on a circle, and a two stages device composed by a XY table plus a tilt platform. The basic theory of active optics corrections is presented. The kinematics of both devices is solved in connection with the active optics application; first test data are presented.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
P. Schipani, L. Ferragina, L. Marty, A. Grado, L. Di Fiore, R. De Rosa, A. La Rana, and A. Busatta "Parallel robots in a ground-based telescope active optics system: theory and experiments", Proc. SPIE 6715, Optomechatronic Actuators and Manipulation III, 671503 (10 October 2007); https://doi.org/10.1117/12.754172
PROCEEDINGS
9 PAGES


SHARE
Advertisement
Advertisement
RELATED CONTENT

Active optics system for the CTIO 4-m telescope
Proceedings of SPIE (June 08 1995)
The VST secondary mirror support system
Proceedings of SPIE (July 23 2008)
Active Forces For Figure Control On A 1.8-Meter Mirror
Proceedings of SPIE (January 01 1987)
Performance of the active M1 cell for the 2.1 m...
Proceedings of SPIE (August 25 1998)

Back to Top