Focus and translation mechanism for the Gemini Multiobject Spectrograph (GMOS)

Peter R. Hastings

doi:10.1117/12.269010

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21 March 1997 Focus and translation mechanism for the Gemini Multiobject Spectrograph (GMOS)

Peter R. Hastings

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Proceedings Volume 2871, Optical Telescopes of Today and Tomorrow; (1997) https://doi.org/10.1117/12.269010
Event: Optical Telescopes of Today and Tomorrow, 1996, Landskrona/Hven, Sweden

Abstract

GMOS is the general-purpose optical spectrograph for the Gemini telescope. It is to be mounted at the Cassegrain focus and has been designed from the outset to have open-loop active correction for the effects of instrumental flexure. This is done by moving the CCD detector mosaic in two axes to counter the image drift due to flexure. GMOS is also focused by moving the detector and the three axis mechanism to achieve these motions is described here. The mechanism also provides the necessary thermal isolation for the cooled CCD and is driven by stepping motors outside the CCD vacuum vessel.

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Peter R. Hastings "Focus and translation mechanism for the Gemini Multiobject Spectrograph (GMOS)", Proc. SPIE 2871, Optical Telescopes of Today and Tomorrow, (21 March 1997); https://doi.org/10.1117/12.269010

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