21 August 1998 Design review of flexure focus stage for the Gemini telescope near-infrared imager
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Proceedings Volume 3354, Infrared Astronomical Instrumentation; (1998); doi: 10.1117/12.317229
Event: Astronomical Telescopes and Instrumentation, 1998, Kona, HI, United States
Abstract
Reviewed is a focus stage designed to accommodate the positioning and stability requirements of the detector arrays in the Gemini North Telescope's Near IR imager (NIRI). Focus axis translation of the two detector arrays is required, while sub-micron deflection stiffness about all other axes is of paramount importance to the successful operation of NIRI. The stiffness requirement coupled with a cryogenic vacuum environment led to a flexure design. Testing of the prototype stage mechanism to date has shown transverse deflections of < 1 micrometers , positioning repeatability of 1 micrometers , and satisfactory cryogenic performance.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jeffrey W. Douglass, Tony T. Young, Klaus-Werner Hodapp, "Design review of flexure focus stage for the Gemini telescope near-infrared imager", Proc. SPIE 3354, Infrared Astronomical Instrumentation, (21 August 1998); doi: 10.1117/12.317229; https://doi.org/10.1117/12.317229
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KEYWORDS
Sensors

Imaging systems

Telescopes

Gemini Observatory

Optical instrument design

Near infrared

Cryogenics

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