We have such a device at work. I'm not sure what brand. It costs DM 20000,
(?$US 15000) a big investment. From what I could judge it was only
effective over about 4 m, therafter too dim for live work. And of course
projecting scans is not nearly as lovely as projecting good slides.
But such devices will almost certainly replace overhead projectors
and slide projectors for many styles of presentation in the future,
and certainly offer more possibilities.
D.
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