Translator Disclaimer
Paper
30 January 2003 Control of the California Extremely Large Telescope primary mirror
Author Affiliations +
Abstract
The current design concept for the California Extremely Large Telescope (CELT) includes 1080 segments in the primary mirror, with the out-of-plane degrees of freedom actively controlled. We construct the control matrix for this active control system, and describe its singular modes and sensor noise propagation. Data from the Keck telescopes are used to generate realistic estimates of the control system contributions to the CELT wavefront error and wavefront gradient error. Based on these estimates, control system noise will not significantly degrade either seeing-limited or diffraction-limited observations. The use of supplemental wavefront information for real-time control is therefore not necessary. We also comment briefly on control system bandwidth requirements and limitations.
© (2003) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Douglas G. MacMartin and Gary A. Chanan "Control of the California Extremely Large Telescope primary mirror", Proc. SPIE 4840, Future Giant Telescopes, (30 January 2003); https://doi.org/10.1117/12.458150
PROCEEDINGS
12 PAGES


SHARE
Advertisement
Advertisement
RELATED CONTENT

The GTC project: preparing the first light
Proceedings of SPIE (June 23 2006)
Segmented mirror control system hardware for CELT
Proceedings of SPIE (July 20 2000)
Control challenges for extremely large telescopes
Proceedings of SPIE (August 14 2003)
The Giant Magellan Telescope phasing system
Proceedings of SPIE (September 13 2012)
Adaptive optics: choices and optimization
Proceedings of SPIE (August 25 1993)

Back to Top