25 October 2011 Optical pressure sensor based on the combined system of a variable liquid lens and a point diffraction interferometer
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Abstract
In this work we present an experimental proposal for an efficient optical pressure sensor based on a Variable Liquid Lens (VLL) and a modified Point Diffraction Interferometer (PDI). The working principle of the proposed sensor relies on the fact that a pressure variation induces a change in the lens curvature and hence in its focal length which can be tracked and measured with the interferometer. The pressure is then measured by recording and processing the interferometric images. The calibration of the sensor in this proposal demonstrated a working range of 0-26 kPa with an accuracy of less than 0.1 kPa in the whole range.
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Anmi García-Arellano, Manuel Gómez-García, Eva Acosta, "Optical pressure sensor based on the combined system of a variable liquid lens and a point diffraction interferometer", Proc. SPIE 8011, 22nd Congress of the International Commission for Optics: Light for the Development of the World, 801122 (25 October 2011); doi: 10.1117/12.903387; https://doi.org/10.1117/12.903387
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