Title
Cryogenic magnetic bearing scanning mechanism design for the SPICA/SAFARI Fourier Transform Spectrometer
Author
TNO Industrie en Techniek
van den Dool, T.C.
Hamelinck, R.F.M.M.
Kruizinga, B.
Gielesen, W.L.M.
Braam, B.C.
Nijenhuis, J.R.
Loix, N.
Luyckx, S.
van Loon, D.
Kooijman, P.P.
Swinyard, B.M.
Publication year
2010
Abstract
TNO, together with its partners Micromega and SRON, have designed a cryogenic scanning mechanism for use in the SAFARI Fourier Transform Spectrometer (FTS) on board of the SPICA mission. The optics of the FTS scanning mechanism (FTSM) consists of two back-to-back cat's-eyes. The optics are mounted on a central "back-bone" tube which houses all the important mechatronic parts: the magnetic bearing linear guiding system, a magnetic linear motor serving as the OPD actuator, internal metrology with nanometer resolution, and a launch lock. A magnetic bearing is employed to enable a large scanning stroke in a small volume. It supports the optics in a freefloating way with no friction, or other non-linearities, enabling sub-nanometer accuracy within a single stage with a stroke of -4 mm to +31.5 mm. Because the FTSM will be used at cryogenic temperatures of 4 Kelvin, the main structure and optics are all constructed from 6061 Aluminum. The overall outside dimensions of the FTSM are: 393 × 130 × 125 mm, and the mass is 2.2 kg. © 2010 SPIE.
Subject
Active magnetic bearings
Cryogenic
Fiber interferometer
Fourier transform spectrometer
Optical delay line
SAFARI
SPICA
Space
Information Society
Mechatronics, Mechanics & Materials Physics & Electronics
OM - Opto-Mechatronics SSE - Space Systems Engineering
TS - Technical Sciences
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TNO identifier
409234
ISBN
9780819482297
ISSN
0277-786X
Source
Modern Technologies in Space- and Ground-Based Telescopes and Instrumentation, 27 June - 2 July 2010, San Diego, CA, USA, 7739 (7739)
Series
Proceedings of SPIE - The International Society for Optical Engineering
Document type
conference paper