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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.
Källa:ESO
Om bilden
ID: | paranal-1100 |
Typ: | Foto |
Publiceringsdatum: | 15 oktober 2010 20:03 |
Storlek: | 2912 x 4080 px |
Om objektet
Namn: | Very Large Telescope |
Typ: | Unspecified : People : Scientist Unspecified : Technology : Observatory : Telescope |
Kategori: | Paranal |
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