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

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

Aug 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998spie.3354.1077t&link_type=abstract

Proc. SPIE Vol. 3354, p. 1077-1083, Infrared Astronomical Instrumentation, Albert M. Fowler; Ed.

Computer Science

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1

Scientific paper

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.

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