Active Phasing Experiment (APE) for the ELT

The ELT will have a segmented mirror. For the adaptive optics to work properly and correct the blurring introduced by the atmosphere turbulence, the segments have to be aligned as if their were part of a single large mirror, with a nanometer accuracy (1 millionth of a mm). In order to experiment with the challenges of this alignment, the APE system will be installed on the VLT, mimicking a segmented mirror and its issues. On the image, the 61 segment APE mirror is being tested in Garching.

Credit:

ESO/H.H.Heyer

About the Image

Id:elt-ape-1000025
Type:Photographic
Release date:3 December 2009, 23:20
Size:2236 x 3376 px

About the Object

Name:APE
Type:• Unspecified : Technology : Observatory : Instrument
• X - Paranal

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