Acousto-optical coherence tomography with a digital holographic detection scheme
Michel Gross (L2C), Fran\c{c}ois Ramaz, Emilie Benoit, Emmanuel Bossy,, Salma Farahi
TL;DR
This paper introduces a novel acousto-optical coherence tomography method that integrates digital holography to improve imaging of scattering media with high resolution and signal quality.
Contribution
It combines AOCT with heterodyne off-axis digital holography, enhancing image quality and providing insights into phase modulation effects on imaging performance.
Findings
Successful imaging of absorbing objects in scattering media
Improved signal-to-noise ratio in reconstructed images
Analysis of phase modulation impact on contrast and size
Abstract
Acousto-optical coherence tomography (AOCT) consists in using random phase jumps on ultrasound and light to achieve a millimeter resolution when imaging thick scattering media. We combined this technique with heterodyne off-axis digital holography. Two-dimensional images of absorbing objects embedded in scattering phantoms are obtained with a good signal-to-noise ratio. We study the impact of the phase modulation characteristics on the amplitude of the acousto-optic signal and on the contrast and apparent size of the absorbing inclusion.
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