|
No, adaptive optics move a motorised mirror (or lens) in the image train to shift the image. Mirrors or lenses are much lighter and can be moved faster due to thier lower mass. When adjustment exceeds the mirror/lens travel, a mount "bump" is issued to allow resuming mirror/lens guiding within the travel they have. Good polar alignment means less bumps.
AO is fast enough to actually chase seeing, unlike with mount guiding, there is no (reasonable) correcting speed limit, although a very bright guide star is required (short exposures) to operate at the fastest speeds.
I often get 0.5 to 0.2 sec exposures with planning, 0.1 if im lucky, with a min of some 0.05 on rare occassions (20hz).
AO at speed virtually eliminates PE, which is a nice bonus, converts an average mount into a PME PE wise with proper tuning.
|