Re: ATM Yet another interesting thought

[Mel Bartels <mbartels@efn.org>]

> Ideally these actuators are made from voice-coils with feedback
> (to speed up tip/tilting corrections),
> but for precision focussing / collimation purposes micro-stepper motors
> with spindles will work too.

Update rate will be at least 10 Hertz (fixing typical resoance of
telescope tube vibration and fixing typical scintillation rates both fall
into same box), so speaker coils come to mind.  The key will be the
feedback system: will need beamsplitter or pickoff diagonal to feed an
imaging system like the SBIG AO.

Mel Bartels