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Updated: Apr 18, 2026

Wideband Optical Detector of Ultrasound for Medical Imaging Applications

Wideband Optical Detector of Ultrasound for Medical Imaging Applications

Published on: May 11, 2014

Ultrasound field measurement using a binary lens.

Gregory Clement, Hideyuki Nomura, Tomoo Kamakura

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control

|February 3, 2015

Summary

A novel binary plate lens focuses ultrasound waves, enabling artifact-free field characterization. This new method improves signal gain and accuracy for ultrasound transducer measurements.

Area of Science:

Acoustics
Optical Physics
Metamaterials

Background:

Traditional field characterization methods using scattering targets are limited by receiver averaging artifacts.
A need exists for improved methods to accurately characterize ultrasound fields without signal degradation.

Purpose of the Study:

To introduce a binary plate lens for focusing ultrasound waves, overcoming limitations of existing methods.
To develop a measurement device for characterizing narrowband ultrasound signals in air with enhanced accuracy and gain.

Main Methods:

Design and implementation of a binary plate lens with bi-convex-like focusing properties for planar and spherical waves.
Integration of the lens with a target and planar receiver to create a specialized measurement device.
Characterization of a 400-kHz in-air transducer field using the developed device and comparison with nonlinear acoustic simulations.

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Main Results:

The binary plate lens successfully focuses spherically spreading waves onto a planar region with nearly-uniform phase.
The measurement device demonstrated good relative pressure correlation with numerical predictions.
Mean pressure differences were within 10-17% over specified decibel drops, validating the method.

Conclusions:

The binary plate lens offers a promising solution for artifact-free ultrasound field characterization.
The developed measurement device provides accurate and reliable characterization of ultrasound fields.
This approach enhances signal gain and reduces measurement artifacts in acoustic field analysis.