24 September 2004 Progress in the optical maintenance of the VLT
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Abstract
Since February 2000, the Washing & Coating Unit of Paranal Observatory, one of the master piece in the coating and re-coating of the VLT mirrors, has been continuously improved. Details of those works will be described as well as the washing process revealed. Measured data will be presented and the efforts made at ESO since 1998 to define suitable on-line monitoring and preventive maintenance will be detailed. In-situ techniques, existing equipment and procedures will be reviewed. Emphasis will be put on the CO2 snow-flake technique and the re-enable of the peelable lacque (XL Clean 5) will be described. The plans for the long-term optical maintenance of the VLT and VLTI mirrors will be exposed.
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Paul Giordano, Paul Giordano, } "Progress in the optical maintenance of the VLT", Proc. SPIE 5494, Optical Fabrication, Metrology, and Material Advancements for Telescopes, (24 September 2004); doi: 10.1117/12.556486; https://doi.org/10.1117/12.556486
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