Randy Boulter <wrb <at> isp.com> writes:

> 
> 
> I have been tasked with doing a conceptual design for a device that tracks 
finger movement using a sensor
> device mounted to the finger.  Does anyone have experience with this or 
something similar?  Or thoughts or
> ideas? 

How about using a (ultra)-sound source at the finger and 3 microphones to 
triangulate the position.  Something like this was used for DNA sequence 
readout from autoradiographs using a pen as pointing device. The resolution was 
in sub-mm range (IIRC).

Another option is to use 3 sound transducers and microphone on the finger to 
find position, similar to GPS, only with ultrasound.

Sergey  

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