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A Technique for Improving the Noise-Equivalent-Displacement of SM-SLD Interferometers for Industrial Processes | IEEE Conference Publication | IEEE Xplore

A Technique for Improving the Noise-Equivalent-Displacement of SM-SLD Interferometers for Industrial Processes


Abstract:

Non-contact absolute distance measurements are desirable in several industrial processes. For this purpose, the interferometric Self-Mixing Super Luminescent Diode techni...Show More

Abstract:

Non-contact absolute distance measurements are desirable in several industrial processes. For this purpose, the interferometric Self-Mixing Super Luminescent Diode technique represents a unique approach for simplicity and robustness. Thanks to optical feedback, large interference fringes, even with diffusive targets and without utilizing high-sensitivity detectors, can be obtained rejecting any stray-light. To establish the absolute target position, the most common approach is to process the interference fringes envelope by the zero-crossing technique. In this paper, we propose to process the photogenerated signal by a custom modified envelope detector to reduce the measurement uncertainty.
Date of Conference: 06-09 September 2021
Date Added to IEEE Xplore: 15 November 2021
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Conference Location: Naples, Italy

References

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