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.

Forrás:

ESO

About the Video

Id:eso9940b
Közzététel napja:1999. augusztus 13.
Related releases:eso9940
Időtartam:10 s
Frame rate:30 fps

About the Object

Category:Paranal

Legacy Videos

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1,8 MB

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