Selective imaging of sound sources in air using phase-calibrated multiwavelength digital holographic reconstructions

Erik Olsson

doi:10.1117/1.2752826

1 July 2007 Selective imaging of sound sources in air using phase-calibrated multiwavelength digital holographic reconstructions

Erik Olsson

Author Affiliations +

Optical Engineering, Vol. 46, Issue 7, 075801 (July 2007). https://doi.org/10.1117/1.2752826

Abstract

A method for selective imaging using multiwavelength digital holographic reconstructions and the phase response of a sound source is demonstrated. Several sound measurements, using laser vibrometry, and digital reconstructions are made for several frequencies of the sound field emitted from two ultrasound transducers with different phase characteristics. Adding the reconstructed complex amplitudes together and applying a filter derived from the standard deviation over the phases for the different reconstructions makes possible a selective imaging of primary sources. When the imaging method is calibrated for a certain phase response, only primary sources with that particular phase response are imaged. Other sources and unwanted speckles are efficiently suppressed. The depth resolution obtained is 3 wavelengths.

©(2007) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Erik Olsson "Selective imaging of sound sources in air using phase-calibrated multiwavelength digital holographic reconstructions," Optical Engineering 46(7), 075801 (1 July 2007). https://doi.org/10.1117/1.2752826

Published: 1 July 2007

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