Opto-mechanical design of SCUBA-2
conference paper
This paper describes the opto-mechanical design of a large instrument for sub-nun, SCUBA-2, to be commissioned at JCMT. The scientific requirements, specially the large fov and the constraints of the telescope mechanical structure, lead to a complex optical design using freeform aluminium minors. The mechanical design is also challenging with large modules to be mounted and aligned in the telescope as well as the cryogenic instrument containing the minors, the filters, the dichroics and the detector modules. The cryogenic isostatic mounting, the structural and thermal designs are presented. This includes details of the fabrication of the structure and design of a shutter mechanism for operation at 4K. The results of the first AIV cool-down are also presented.
Topics
TNO Identifier
239544
ISSN
0277786X
ISBN
9780819463388
Publisher
SPIE
Article nr.
62732H
Source title
Optomechanical Technologies for Astronomy, 24-31 May 2006, Orlando, FL, USA
Collation
18 p.
Files
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