Picoradian deflection measurement with an interferometric quasi-autocollimator using weak value amplification.

@article{Turner2011PicoradianDM,
  title={Picoradian deflection measurement with an interferometric quasi-autocollimator using weak value amplification.},
  author={Matthew D Turner and C. Hagedorn and S. Schlamminger and J. Gundlach},
  journal={Optics letters},
  year={2011},
  volume={36 8},
  pages={
          1479-81
        }
}
We present an "interferometric quasi-autocollimator" that employs weak value amplification to measure angular deflections of a target mirror. The device has been designed to be insensitive to all translations of the target. We present a conceptual explanation of the amplification effect used by the device. An implementation of the device demonstrates sensitivities better than 10 picoradians per root hertz between 10 and 200 Hz. 
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