9 August 2016 4MOST metrology system image processing
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Abstract
The 4-meter Multi-Object Spectroscopic Telescope (4MOST) instrument uses ~ 2400 individually positioned optical fibres to couple the light of targets into its spectrographs. The metrology system determines the position of the back-illuminated fibres on the focal surface of the telescope. It consists of 4 identical cameras that are mounted on the spider vanes of the secondary mirror of the VISTA telescope and look through the entire optical train, including M1, M2 and the WFC/ADC unit. Here, we describe the image and data processing steps of the metrology system as well as present results from our 1 in 10 sized lab prototype.
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Roland Winkler, Samuel C. Barden, Allar Saviauk, "4MOST metrology system image processing", Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 990891 (9 August 2016); doi: 10.1117/12.2233257; https://doi.org/10.1117/12.2233257
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