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Proceedings Paper

Folded Cassegrain sets of the Gran Telescopio Canarias (GTC)
Author(s): Alberto Gomez; Rubén Sanquirce; Gaizka Murga; Borja Etxeita; Alberto Vizcargüenaga; Ander San Vicente; Esther Fernandez; Oscar Vega; Benjamín Siegel
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Paper Abstract

The Gran Telescopio Canarias (GTC) has been recently received two Folded Cassegrain Sets (FC-Sets) composed of an instrument rotator and the corresponding Acquisition and Guiding (AG) optomechanics. IDOM has been the responsible for the design, manufacturing, assembly and commissioning of the two units of FC-Sets. The design combines a compact layout of the mechanical system, enhanced by an innovative cable wrap design, resulting in a smooth and precise movement, whilst guaranteeing good access to important components and maximizing the maintainability. The custom design of the cable wrap as an evolution of the rolling loop type eliminates the need for a cable chain static housing, minimizing weight and impact on the telescope tube. The AG Mechanics provides the required pointing and focusing capabilities in a compact configuration. In January 2010, IDOM is awarded the design and procurement of the two FC-Sets. The final design is approved by GRANTECAN and the fabrication process starts in Nov 2011. The assembly and commissioning of both units are completed in April 2011. Once the Factory Acceptance Tests finishes in Dec 2011, all the elements are delivered to the Observatorio del Roque de los Muchachos (ORM). The Site Acceptance Tests are completed in Feb 2012.

Paper Details

Date Published: 17 September 2012
PDF: 13 pages
Proc. SPIE 8444, Ground-based and Airborne Telescopes IV, 84444N (17 September 2012); doi: 10.1117/12.926388
Show Author Affiliations
Alberto Gomez, IDOM (Spain)
Rubén Sanquirce, IDOM (Spain)
Gaizka Murga, IDOM (Spain)
Borja Etxeita, IDOM (Spain)
Alberto Vizcargüenaga, IDOM (Spain)
Ander San Vicente, IDOM (Spain)
Esther Fernandez, IDOM (Spain)
Oscar Vega, IDOM (Spain)
Benjamín Siegel, GRANTECAN S.A. (Spain)


Published in SPIE Proceedings Vol. 8444:
Ground-based and Airborne Telescopes IV
Larry M. Stepp; Roberto Gilmozzi; Helen J. Hall, Editor(s)

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