Design review of flexure focus stage for the Gemini telescope near infrared imager

Details Design review of flexure focus stage for the Gemini telescope near infrared imager Design review of flexure focus stage for the Gemini telescope near infrared imager

Aug 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998spie.3354.1062d&link_type=abstract

Proc. SPIE Vol. 3354, p. 1062-1067, Infrared Astronomical Instrumentation, Albert M. Fowler; Ed.

Computer Science

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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.

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