The giant coating plant for the Very Large Telescope

View of the upper part of the VLT coating plant. The coating unit is a large vacuum chamber with a diameter of 9.4 meters and a volume of about 122,000 liters. The required ultra-high vacuum is generated by 8 cryo-pumps which are located on top of the vacuum chamber. This support system is fixed on a central shaft which is driven by a high precision motor gear system arranged below the vacuum chamber. The 80 nanometer (80 millionth of a millimeter) thin aluminum coating is produced by utilizing the sputtering technology. During the coating process the mirror is rotated with a speed of 5 revolutions per hour under the sputter source, which is fixed inside the upper half of the vacuum chamber.

Crédit:

ESO

À propos de l'image

Identification:eso9711d
Type:Photographique
Date de publication:16 mai 1997
Communiqués de presse en rapport:eso9711
Taille:560 x 579 px

À propos de l'objet

Nom:Very Large Telescope
Type:Unspecified : Technology : Observatory : Telescope
Catégorie:Paranal

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