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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.
© (2003) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Oliver P. Lay, Serge Dubovitsky, Robert D. Peters, Johan Burger, Seh-Won Ahn, William H. Steier, Harold R. Fetterman, and Yian Chang "Absolute distance measurement with the MSTAR sensor", Proc. SPIE 5190, Recent Developments in Traceable Dimensional Measurements II, (20 November 2003);

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