Optical imaging of transient acoustic fields using a phase contrast method
Abstract
A coherent phase-contrast optical system has been designed and tested for tomographic imaging of pressure fields from experimental transient acoustic signals. The system is similar to the pulsed, central-order schlieren method, but uses a Fourier filtering technique that images the actual acoustic pressure field, where the former technique reconstructs only the absolute value of the field. Simulations of the system are performed using a single-cycle sine-wave acoustic pulse. Experimental images resulting from a broad-band Gaussian pulse input to an underwater piezoceramic transducer array are presented. Relative pressure field s are reconstructed in space over a series of times after the source excitation. Theory and limitations of the phase contrast system are discussed.
Cite
@article{arxiv.1407.4758,
title = {Optical imaging of transient acoustic fields using a phase contrast method},
author = {G. T. Clement and S. V. Letcher},
journal= {arXiv preprint arXiv:1407.4758},
year = {2014}
}
Comments
From "Evaluation of transient and highly localized acoustic fields using acoustooptic phase contrast imaging" (2000). Chapter 1: Optical imaging of transient acoustic fields using a phase contrast method