some pics of that optical mechanism at this site:
http://www.cadcam-magazine.co.uk/htm/_casestudies/060001.htm

It was also featured in a copy of one of the IEE publications earlier this year... probably the iee
magazine.

Regards,
Simon

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
"[PIC]:","[SX]:","[AVR]:" =uP ONLY! "[EE]:","[OT]:" =Other "[BUY]:","[AD]:" =Ads