Re: [ATM] Tracking Systems for Astrophotography

[Ken Hunter <atm_ken_hunter@yahoo.com>]

Or...

You could use an Equatorial mounting.

Ken Hunter

--- Don Clement <clement.focuser@verizon.net> wrote:

> 
> 
> > Don Clement is apparently trying to do an analog
> tracking system with the
> 4
> > quadrant detector scheme but this is going to need
> a lot of light
> > multiplication in order to work right.
> 
> That is what the image intensifier up front of the
> quad diode is for without
> the need to cool the detectors. Only the front end
> is analog. ADCs after the
> four current to voltage opamps would allow digital
> processing  and
> conditioning including digital LPF and HPF for use
> with the dual mechanical
> control including  high speed tilt-tip mirror. The
> quad detectors are small
> and inexpensive enough to use two quads behind an
> image intensifier in order
> to track two stars. The use of a high speed tilt-tip
> mirror allows for
> slower slewing motors to be used in the main scope
> control. The quad diodes
> are fast enough in conjunction with a tip-tilt
> mirror to allow for some
> atmospheric correction.
> 
> Don Clement
> Running Springs, California
> 
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> ATM mailing list http://www.atmlist.net/
> 



		
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