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Spirit vertical resolution?

Hello -

  I recently observed a Spirit Datacine in action (NAB) and based on my
earlier question to TIG (about the linear CCD in the Spirit) I am now curious
as to how the Spirit can so accurately position the film while scanning.
Since Spirit uses a linear (line) CCD array, the vertical resolution must be
determined by the precision of the mechanical transport of the film through
the gate.  I am wondering how the Spirit can do this so accurately to achieve
the resolution that it does.  Using a direct drive stepper motor is the first
thing that comes to mind, but, I don't see how that would be precise enough.
Is this how it actually is done?  What is the vertical resolution of the


Thanks to Steve Roach/Sierra Design Labs for supporting the TIG in 1998..
No product marketing allowed on the main TIG.  Contact rob at alegria.com
944 subscribers in 36 countries on Sat Apr 11 20:40:23 PDT 1998 
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