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Proceedings Paper

Gemini near-infrared imager on-instrument wavefront sensor gimbal tilt stage
Author(s): Robert J. Thornton; Jeffrey W. Douglass; Klaus-Werner Hodapp; Tony T. Young; Hubert Yamada
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Paper Abstract

We present a high-resolution gimbal mirror mechanism which will perform the beam steering for the on-instrument wavefront sensor section of the Gemini near-IR imager. In turn, the wavefront sensor will generate correction signals for the tip-tilt and fast-focus secondary mirror. Preliminary testing of the current version of the gimbal assembly has revealed positive result when operated at room temperature, but demonstrated hysterisis problems at cryogenic temperatures. Described in this paper are the specifications, design and performance characteristics, and integration of the gimbal mechanism with the rest of the wavefront sensor system.

Paper Details

Date Published: 21 August 1998
PDF: 7 pages
Proc. SPIE 3354, Infrared Astronomical Instrumentation, (21 August 1998); doi: 10.1117/12.317232
Show Author Affiliations
Robert J. Thornton, Univ. of Hawaii/Manoa (United States)
Jeffrey W. Douglass, Univ. of Hawaii/Manoa (United States)
Klaus-Werner Hodapp, Univ. of Hawaii/Manoa (United States)
Tony T. Young, Univ. of Hawaii/Manoa (United States)
Hubert Yamada, Univ. of Hawaii/Manoa (United States)


Published in SPIE Proceedings Vol. 3354:
Infrared Astronomical Instrumentation
Albert M. Fowler, Editor(s)

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