Wonders of Active Optics: Astigmatic

The video shows the effect of astigmatism of the primary mirror. The stellar images change from a line to a square and then to a line in the perpendicular direction. This is caused by the secondary mirror moving back and forth along the optical axis.



About the Video

Release date:13 August 1999
Related releases:eso9940
Duration:10 s

About the Object

Legacy Videos

Legacy Video
1.8 MB

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