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Recording Ultra-Realistic Full-Color Analog Holograms for Use in a Moving Hologram Display

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Published on: January 14, 2020

Acousto-optic holography.

Samuel A Verburg¹, Earl G Williams², Efren Fernandez-Grande¹

¹Acoustic Technology, Department of Electrical and Photonics Engineering, Technical University of Denmark, Ørsteds Plads, Building 352, 2800 Kongens Lyngby, Denmark.

The Journal of the Acoustical Society of America

|December 31, 2022

Summary

This summary is machine-generated.

A novel acousto-optic holography method noninvasively captures sound fields using light. This technique accurately reconstructs acoustic pressure and particle velocity, overcoming limitations of traditional methods, especially at higher frequencies.

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Three-dimensional Optical-resolution Photoacoustic Microscopy

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Published on: May 3, 2011

Area of Science:

Acoustics
Optics
Wave physics

Background:

Acousto-optic sensing uses sound-light interactions to measure pressure fields noninvasively.
Current reconstruction methods limit acousto-optic sensing applications.
Conventional transducers can perturb sound fields, especially at mid/high frequencies.

Purpose of the Study:

To propose and validate a new acousto-optic holography method.
To enable noninvasive characterization of acoustic fields in the near field.
To overcome limitations of existing acoustic field reconstruction techniques.

Main Methods:

Developed an acousto-optic holography technique for near-field acoustic sensing.
Expanded acousto-optic measurements into propagating and evanescent waves.
Utilized an algebraic wave expansion for arbitrary projection sets.

Main Results:

Successfully captured the acoustic field radiated by a vibrating plate using optical data.
Achieved accurate holographic reconstructions of pressure, particle velocity, and intensity fields.
Demonstrated the method's effectiveness for mid and high-frequency sound fields.

Conclusions:

The proposed acousto-optic holography method enables complete, noninvasive acoustic field characterization.
This technique is particularly advantageous for high-frequency acoustics where conventional methods struggle.
The method offers a powerful tool for studying complex sound fields without field perturbation.