3.58 meter mirror for the New Technology Telescope (NTT)

Early July 1988, the 3.58 meter mirror for the New Technology Telescope (NTT) rests on its active support system during the final tests at the Carl Zeiss (Federal Republic of Germany) works in Oberkochen, FRG. The 6-ton mirror blank is made of Zerodur, a glass ceramic, and was produced by Schott in Mainz, FRG. The polishing of the mirror by Zeiss has taken two years in order to obtain an unsurpassed optical quality. The exceedingly smooth surface has residual errors of no more than 25 nanometers (1 nanometer = 1 millionth of a millimeter).

Crédit:

ESO

À propos de l'image

Identification:eso8805a
Type:Photographique
Date de publication:14 juillet 1988
Communiqués de presse en rapport:eso8805
Taille:1305 x 1734 px

À propos de l'objet

Nom:New Technology Telescope
Type:Unspecified : Technology : Observatory : Telescope
Catégorie:La Silla

Image Formats

Grand JPEG
798,6 Kio
JPEG taille écran
513,8 Kio