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Laser Mouse Sub-Rev Tach Answered

I would like to use a laser mouse as a sub-revolution tachometer. I know that a laser mouse can discern 1 part in 1,000. Some can discern 1 part in 2,000. If you print a ribbon with vertical lines and attach it around a disk you could expose the laser to the lines and create a data stream. I have already found a way to increase the USB polling rate in XP from 125 MHZ to as much as 1,000 MHZ. Though I have tried to find information on how to proceed with my idea, I have thus far found little to help me move forward. Is there anyone on this list with ideas that mght help make this project a reality? This could be data acquisition on the cheap. Really cheap. :)