Wonders of Active Optics: Images with six-fold symmetry

Wonders of Active Optics: Images with six-fold symmetry

The video clip shows the effects of six-fold symmetry deformation of the primary mirror.

During the sequence shown in ESO Press Video eso9940, the secondary mirror is first moved in one direction along the optical axis and then back to the "best focus" position, then to the other direction and finally again back to the "best focus" position; this sequence is repeated twice for clarity. As in the case of astigmatism, the lines rotate when one goes from one side of the best focus to the other side. However, the rotation angle is now only 30°, not 90° as in the case of astigmatism.

Credit:

ESO

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About the Video

Id:eso9940c
Release date:13 August 1999
Related releases:eso9940
Duration:11s

About the Object

Type:• X - Paranal

Videos

Legacy Video
1.8 MB

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