>> Getting scanning linear would be an impressive trick though, since the
>> screen is typically flat, but a constant length beam would describe a
>> section of a sphere.
>
> First, if you sweep out a relatively narrow angle, the effect will be
> minimized.  Second, you don't have to sweep linearly, just display the
> pixels linearly.

I have a book that describes a laser projection system from the 80's,
probably Japanese. They used gas lasers, electro-optical modulators for
intensity, and spinning prism H deflection (on air or magnetic bearings)
to project a 10x20m image. I do not know about quality.

Peter

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