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Was it a good coating?
An engineer makes the first visual inspection of a VLT primary mirror surface after the coating. Since telescopes spend the night under the stars, the mirrors accumulate on their surfaces a certain amount of dirt which reduces the reflectivity and degrades the image. For this reason, the VLT 8.2-metre primary mirrors (M1s) need to be cleaned periodically. The cleaning of the M1s is a very delicate operation which takes place every 18 months and involves removing the aluminium by chemical washing and then recoating the mirror.
Credit:ESO
Over de afbeelding
Id: | paranal-1100 |
Type: | Fotografisch |
Publicatiedatum: | 15 oktober 2010 20:03 |
Grootte: | 2912 x 4080 px |
Over het object
Naam: | Very Large Telescope |
Type: | Unspecified : People : Scientist Unspecified : Technology : Observatory : Telescope |
Categorie: | Paranal |
Afbeeldingstypen
Grote JPEG
3,5 MB
Publication TIFF 4K
21,3 MB
JPEG voor publicatie
3,2 MB
Beeldschermformaat
374,5 KB