A reference-beam autocollimator with nanoradian sensitivity from mHz to kHz and dynamic range of 10(7).

@article{Arp2013ARA,
  title={A reference-beam autocollimator with nanoradian sensitivity from mHz to kHz and dynamic range of 10(7).},
  author={T. Arp and C. Hagedorn and S. Schlamminger and J. Gundlach},
  journal={The Review of scientific instruments},
  year={2013},
  volume={84 9},
  pages={
          095007
        }
}
We describe an autocollimating optical angle sensor with a dynamic range of 9 mrad and nrad/√Hz sensitivity at frequencies from 5 mHz to 3 kHz. This work improves the standard multi-slit autocollimator design by adding two optical components, a reference mirror and a condensing lens. This autocollimator makes a differential measurement between a reference mirror and a target mirror, suppressing common-mode noise sources. The condensing lens reduces optical aberrations, increases intensity, and… Expand
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