some of the laser pattern projectors used at concerts and bars etc.
actually just use a mirror on a somewhat flexible aluminum arm (i.e.
thin and several inches long) with a permanent magnet and move the
mirror with just the magnetic field from a motor (with no physical
connection to the motor, just using it's coils as a magnetic field
source).  you would use one pair of mirror/magnet and motor for each
axis.  of course the deflections are small so the mirrors and the laser
source need to be close together.  you'll also want to use first surface
mirrors to avoid ghost images.

depending on the size/resolution you want in the projected image you
might also want to use a beam expander after the deflection stage to
make the beam fatter, otherwise you will have a very thin beam requiring
a lot of scan lines for an image.  more scan lines also mean the
deflection has to be faster to maintain a fast enough refresh rate for
the image.

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