Next Article in Journal
A Novel Modification of PSO Algorithm for SML Estimation of DOA
Next Article in Special Issue
Omni-Directional Scanning Localization Method of a Mobile Robot Based on Ultrasonic Sensors
Previous Article in Journal
A Method of Detections’ Fusion for GNSS Anti-Spoofing
Previous Article in Special Issue
A Mathematical Model of a Novel 3D Fractal-Inspired Piezoelectric Ultrasonic Transducer
Article Menu

Export Article

Open AccessArticle
Sensors 2016, 16(12), 2185; doi:10.3390/s16122185

A Novel Fisheye-Lens-Based Photoacoustic System

1
Department of Medical IT Convergence Engineering, Kumoh National Institute of Technology, Gumi 39253, Korea
2
Department of Optical System Engineering, Kumoh National Institute of Technology, Gumi 39253, Korea
3
Department of Biomedical Engineering, Gachon University, In-cheon 21936, Korea
*
Author to whom correspondence should be addressed.
Academic Editors: Dipen N. Sinha and Cristian Pantea
Received: 28 October 2016 / Revised: 8 December 2016 / Accepted: 14 December 2016 / Published: 19 December 2016
(This article belongs to the Special Issue Ultrasonic Sensors)
View Full-Text   |   Download PDF [4380 KB, uploaded 19 December 2016]   |  

Abstract

This paper presents a novel fisheye-lens-based photoacoustic (PA) system. In conventional PA systems, mechanical motors are utilized to obtain the target information due to the small fields of view of such systems. The use of such motors introduces mechanical noise, which is difficult to remove when processing the echo signals. A fisheye lens system offering a wide field of view would effectively reduce the motor effects (i.e., the noise) and enable the system to have a wide field of view. Therefore, in this work, we propose a novel fisheye lens scheme and describe a PA system based on the developed lens scheme. In addition, to confirm the feasibility of the fisheye-lens-based PA system, we present the typical pulse-echo responses obtained using a 20 MHz single element immersion transducer and the echo signals measured from bull’s eye tissue samples separated by approximately 4, 6, 8, and 10 cm diagonally and 2 cm vertically from the fisheye lens. The experimental results demonstrate that the echo signal amplitudes, their center frequencies, and the −6 dB bandwidths obtained using red, green, and blue lights and a fisheye lens are acceptable when the fisheye lens is separated from a sample both diagonally and vertically. Therefore, fisheye-lens-based PA systems could be a potential method of achieving wide fields of view while reducing the mechanical motor effects. View Full-Text
Keywords: fisheye lens; photoacoustic; ultrasound; transducers fisheye lens; photoacoustic; ultrasound; transducers
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Choi, H.; Ryu, J.; Kim, J. A Novel Fisheye-Lens-Based Photoacoustic System. Sensors 2016, 16, 2185.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top