LASERS! && Freemont Street LED array (was Re: Cray J932SE (was Re: Straight 8 up on Ebay just now))

Well, if it takes longer than 100ms to replot the display, it will flicker visibly, and the more under 100ms the better. In that time I'd like to draw at least a couple hundred lines, though most of them will be short (line length maybe 1-15% of corner-to-corner distance). What kind of radians/second deflection rates this means depends on how far But, in terms of the bandwidth on the X and Y axis signals? If we say 200 lines at 25 ms replot (I get 20ms frame rate out of the cg6 for displays significantly more complex than that - ie, with the cg6 the actual limitation is the video signal vertical frequency), that's 125us/line. Turning sharp corners is the hard part with mechanical deflectors like mirrors, as it means very high acceleration of the mechanical parts. I haven't done the math to be sure, but, until/unless taught otherwise by testing, I'd feel dubious about clipping the X and Y signal bandwidths at anything lower than ~1MHz. /~\ The ASCII Mouse \ / Ribbon Campaign X Against HTML mouse at rodents-montreal.org / \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B