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Proceedings Paper

Design of a convex and camera mirror support system for Altair, the Gemini-North adaptive optics system
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Paper Abstract

The Convex Camera Structure (CCS) is a welded Invar structure that supports of the final two optical elements in the Altair science path. The CCS assembly holds the large camera mirror, a 295 mm diameter off-axis conic, in close relation with the smaller convex mirror, a 146 mm diameter off-axis conic. The image quality requirement imposed stringent spatial tolerance between the two mirrors: +/- 45 micrometers in axial separation, +/- 70 micrometers in decenter and +/- 30 arcsecond in allowable tilt. These tolerances include contributions from initial alignment error, geometrical and dimensional changes due to gravity and temperature. This paper gives an overview of the CCS and its associated components. Flexures are integral part of the CCS assembly, they are utilized to connect the CCS to the aluminum main optical bench, the mirror to the six degree- of-freedom mount, and the 6DOF mount to the CCS end plate. The design considerations and engineering analyses of the CCS assembly are outlined.

Paper Details

Date Published: 16 August 2000
PDF: 8 pages
Proc. SPIE 4008, Optical and IR Telescope Instrumentation and Detectors, (16 August 2000); doi: 10.1117/12.395416
Show Author Affiliations
Kei Szeto, Herzberg Institute of Astrophysics/National Research Council Canada (Canada)
Scott C. Roberts, Herzberg Institute of Astrophysics/National Research Council Canada (Canada)
Andre Anthony, Herzberg Institute of Astrophysics/National Research Council Canada (Canada)
Joeleff T. Fitzsimmons, Herzberg Institute of Astrophysics/National Research Council Canada (Canada)
Robert Gaunt, Herzberg Institute of Astrophysics/National Research Council Canada (Canada)
Jerry Sebesta, Herzberg Institute of Astrophysics/National Research Council Canada (Canada)
Jean-Pierre Veran, Herzberg Institute of Astrophysics/National Research Council Canada (Canada)


Published in SPIE Proceedings Vol. 4008:
Optical and IR Telescope Instrumentation and Detectors
Masanori Iye; Alan F. M. Moorwood, Editor(s)

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