Very Large Telescope Interferometer

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		KUEYEN (left) and MELIPAL. Two of the four 8.2m telescopes, ESO Very Large Telescope array, Cerro Paranal, Atacama Desert, Chile.
		VLTI Delay Line mechanical installation team in Paranal, from left to right: Frederic Derie, VLTI Delay Line Project leader, ESO Ronald van der Klaauw, AIT technician, Dutch Space Harm Hogenhuis, System engineer, Dutch Space Fred Kamphues, Mechanical engineer, Mill House
		The Delay Line tunnel, with the 66 meter rail sections for Delay Line #1 and #2 installed.
		Ronald van der Klaauw assembling the carriage.
		Carriage friction test. The small high frequency velocity variations of the carriage are measured with a laser interferometer. Overall friction of the 250 kg carriage is less than 50 gram.
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With thanks to the European Southern Observatory (ESO), Dutch Space, TNO, and Mill House Consultancy. More information on the VLTI Delay Line project: http://www.eso.org/outreach/press-rel/pr-2001/pr-06-01.html http://www.eso.org/outreach/press-rel/pr-2000/phot-26-00.html