20 November 2003 Absolute distance measurement with the MSTAR sensor
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The MSTAR sensor (Modulation Sideband Technology for Absolute Ranging) is a new system for measuring absolute distance, capable of resolving the integer cycle ambiguity of standard intrferometers, and making it possible to measure distance with sub-nanometer accuracy. The sensor uses a single laser in conjugation with fast phase modulators and low-frequency detectors. We describe the design of the system - the principle of operation, the metrology source, beam-launching optics, and signal processing - and show results for target distance up to 1 meter. We then demonstrate how the system can be scaled to kilometer-scale distances.
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Oliver P. Lay, Serge Dubovitsky, Robert D. Peters, Johan Burger, Seh-Won Ahn, William H. Steier, Harold R. Fetterman, Yian Chang, "Absolute distance measurement with the MSTAR sensor", Proc. SPIE 5190, Recent Developments in Traceable Dimensional Measurements II, (20 November 2003); doi: 10.1117/12.503760; https://doi.org/10.1117/12.503760

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