21 March 1997 Dust contamination and in-situ cleaning of ground-based telescope optics: the VLT approach
Author Affiliations +
Proceedings Volume 2871, Optical Telescopes of Today and Tomorrow; (1997) https://doi.org/10.1117/12.269065
Event: Optical Telescopes of Today and Tomorrow, 1996, Landskrona/Hven, Sweden
Abstract
It seems to be a fundamental law of nature that optical surfaces become dirty. On-site contamination has been recorded at the ESO La Silla Observatory and at the VLT site over a period of six years. Measured data are presented, and the efforts made at ESO since 1990 to define suitable on-line monitoring and preventive maintenance are detailed. In-situ cleaning techniques, existing equipment and procedures are reviewed. Emphasis is put on the carbon-dioxide snowflake cleaning technique and the integrated cleaning device of the 3.5 m NTT telescope is described. The preliminary cleaning and protection test conducted on the first finished 8 m mirror at the optical manufacturer's site is presented as well, and plans for the in-situ cleaning of the VLT mirrors are explained.
© (1997) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Paul Giordano, Paul Giordano, "Dust contamination and in-situ cleaning of ground-based telescope optics: the VLT approach", Proc. SPIE 2871, Optical Telescopes of Today and Tomorrow, (21 March 1997); doi: 10.1117/12.269065; https://doi.org/10.1117/12.269065
PROCEEDINGS
8 PAGES


SHARE
RELATED CONTENT

Mirror cleaning investigations at the CFHT
Proceedings of SPIE (May 31 1994)
Cleaning large optics with CO2 snow
Proceedings of SPIE (June 30 1990)
Advances in telescope mirror cleaning
Proceedings of SPIE (September 23 2004)
Progress in the optical maintenance of the VLT
Proceedings of SPIE (September 23 2004)

Back to Top