Speckle-based position monitoring

Mahmoud A. Morsy; Antoine Wojdyla; George Anwar; Burkhard Lehmann; Federico Murtagh

doi:10.1117/12.2582860

5 March 2021 Speckle-based position monitoring

Mahmoud A. Morsy, Antoine Wojdyla, George Anwar, Burkhard Lehmann, Federico Murtagh

Proceedings Volume 11671, Real-time Measurements, Rogue Phenomena, and Single-Shot Applications VI; 116710L (2021) https://doi.org/10.1117/12.2582860
Event: SPIE LASE, 2021, Online Only

Conference Poster

Abstract

We propose the use of a new precision monitoring technique based on speckle analysis (SuPreMe). This technique only requires three parts: a laser, a weak optical diffuser (e.g. unpolished metallic surface) and a camera, all elements widely available at a low cost, while allowing absolute position estimation. The technique relies on the emergence of rings in the power spectrum density of the collected speckle intensity, related to Talbot distance. Using simulation and prior experimental data, we are demonstrating the viability of the technique, showing for example that it is possible to extract absolute displacement measurement of 100 μm with a precision range of 7 nm-rms.

Conference Presentation

Citation Download Citation

Mahmoud A. Morsy, Antoine Wojdyla, George Anwar, Burkhard Lehmann, and Federico Murtagh "Speckle-based position monitoring", Proc. SPIE 11671, Real-time Measurements, Rogue Phenomena, and Single-Shot Applications VI, 116710L (5 March 2021); https://doi.org/10.1117/12.2582860

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