I haven't calculated how many minutes or seconds I need in the arc I'll be doing that next. I completely forgot about the gearing will help with the precision. I am planning on having the end point, dot of the laser, being accurate within 6.5mm(0.25in) at about 3m(10ft). I'm not 100% sure where to find any information on using a lense/voice coil setup, a stepper motor should be good enough I think and easier to work with (no experience though with voice coils).
Thanks for the help and tips.