Gemini near-infrared imager on-instrument wavefront sensor gimbal tilt stage

Robert J. Thornton; Jeffrey W. Douglass; Klaus-Werner Hodapp; Tony T. Young; Hubert Yamada

doi:10.1117/12.317232

21 August 1998 Gemini near-infrared imager on-instrument wavefront sensor gimbal tilt stage

Robert J. Thornton, Jeffrey W. Douglass, Klaus-Werner Hodapp, Tony T. Young, Hubert Yamada

Proceedings Volume 3354, Infrared Astronomical Instrumentation; (1998) https://doi.org/10.1117/12.317232
Event: Astronomical Telescopes and Instrumentation, 1998, Kona, HI, United States

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.

Citation Download Citation

Robert J. Thornton, Jeffrey W. Douglass, Klaus-Werner Hodapp, Tony T. Young, and Hubert Yamada "Gemini near-infrared imager on-instrument wavefront sensor gimbal tilt stage", Proc. SPIE 3354, Infrared Astronomical Instrumentation, (21 August 1998); https://doi.org/10.1117/12.317232

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