Fiberoptic joystick with quadrature encoders and arduino

I have designed and built a joystick that contains no electronic parts -- only fiberoptics. The motion is sensed via quadrature encoding, and the signal processing is handled by an arduino microcontroller.

Here is a similar project for linear position tracking:
http://benkrasnow.blogspot.com/2010/02/linear-position-tracking-with.html


This joystick is designed for use in MEG and MRI scanners where the electronics may interfere with the scanner's operation.


Fiber transmitter and receivers:
Avago HFBR-2412TZ (mouser)
Avago HFBR-1414TZ

Quadrature decoder:
Avago HCTL-2032-SC (mouser)

Fiberoptic cables:
62.5 um glass fiber custom cables from http://www.ecablemart.com/

Code wheel from http://usdigital.com/