Use the lambda/8 wave plate in one arm of the Michelson in order to produce a large dynamic range linear readout.
Potentially to be used to make the ultimate OSEM or seismometer.
Optical Seismometer work at UCSD / Scripps: http://gravity.ucsd.edu/research/OFSEIS/opt_seis.html
I've attached the project plan that I submitted to SFP.
--- Chris