Now, just because I don't clearly understand the way you propose doesn't mean I don't consider it valid. However, there IS another way that's not totally unheard-of.

If you have a small mirror, and the ones I've seen are, in most cases pentagonal or hexagonal, though two sides would work, too, I guess, and spinning at a pretty high rate, and a modulated laser beam is projected on it, sweeping in a direction parallel to the spinning mirror's axis. That way, the spinning mirror provides the sweep in the direction perpendicular to the spinning mirror's axis, while the other provides the much slower sweep in the direction parallel to it.

That reduces everything to timing. Now, it's not trivial, but it is mechanically simpler, since the rate of rotation of the spinning mirror is constant, and the demands on the movement of the oscillating mirror are less stringent, since it can operate at a slower rate.

That's another option, isn't it?

What do you think?

RE