.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).

Credit:

ESO

About the Image

Id:eso8805a
Type:Photographic
Release date:14 July 1988
Related releases:eso8805
Size:1305 x 1734 px

About the Object

Name:New Technology Telescope
Type:• Unspecified : Technology : Observatory : Telescope
• X - La Silla

Image Formats

Large JPEG
798.1 KB
Screensize JPEG
513.7 KB

 

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