Abstract
We investigate the effect of detector distance and beam width in acousto-optic beam deflection probing in air. The study investigates pure refraction regime (beam width⪡ acoustic wavelength). We find that in this regime the increase in beam width can significantly increase the detected signal up to 8 folds higher than previous detection geometries—while the detector distance has a less noticeable effect. Theoretical results are assessed through an experiment with a commercially available ultrasonic transducer. This investigation provides detailed theoretical approaches and quantitative experimental characterization that can be used for numerous applications requiring beam deflection probing in air.
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