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Re: Projection displays

 wrote:
> 
> >Muscle wire would be too slow...mirrors are a possibility, but would
> 
> We have a project looking to do this with Bragg cells (Rich/Brian, you
> listening?).
> 
> A Bragg cell is a solid state crystal that changes its refractive
> index when you put electicity across it.  Used in optical computing.
> Quartz is a low-end example.
> 
> So, the idea is shine a laser through the first Bragg cell for X
> dimension scanning and through the second Bragg cell for Y dimension.
> Voila', a solid state, no moving parts scanner.  About 15 degree FOV
> we hope.
> 
> Problems:
> 
>         1) Getting a bright enough laser
>         2) If the scanning fails, not blinding someone with it
> 
> As MTV News says:  You heard it here, first.
> 
>                                         Thad Starner
>                                         Georgia Tech/MIT Media Laboratory
>                                         Wearable Computing Project

  If you set things up so when you stop the drive the beam hits an
absorption device of whatever kind, and run it (if deflected) onto a
convex mirror of the proper shape, you can greatly increase the FOV
output of the device.  You could do the inverse of that 360 degree
camera, and run 360 degree horizontal-sih projections, potentially
(absorb the beam if centered in the mirror.)  Wider FOV this way.

  Mark, 

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