As Karl notes, to achieve a good resolution by spinning a length of optical fibre in a spiral to cover the field of view (akin to how a cathode ray scans back and forth to cover an area) would have said fibre exceeding the sound barrier, if you want a decent refresh rate.
Quite apart from the velocity/refresh question - is it just me, or does that sound terrifyingly close to "here, put this weed-whacker / garden strimmer 2 inches from your eyeballs"?
Biting the hand that feeds IT
