Tunable depth of focus of acoustical pupil masked Soret Zone Plate

Sergio Castiñeira-Ibáñez, Daniel Tarrazó-Serrano, Oleg V. Minin, Constanza Rubio, Igor V. Minin

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In acoustical lenses both resolution and depth of focus are determined by diffraction and the smaller the lens aperture the worse the resolution and the greater the depth of focus. Diffraction-limited resolution has a Soret Zone Plate, but a long depth of focus has an axicon. Nevertheless, these are two different devices each of which requires its own independent design. In this paper, we have shown that the transition from focusing to a diffraction limited spot to a quasi-diffraction free beam can be realized in the same focusing device without changing its topology. It has been shown that using a classical planar Soret Zone Plate lens made of a concentric array of circular aperiodical rings with an amplitude pupil mask placed closely to the surface of lens allows to form a quasi-Bessel beams under specific conditions, part of a diffracted wave collimates, producing an elongated focus. Experiments are performed in water tanks in order to verify the simulation results. Experimental verification shown that the depth of focus of a pupil-masked Soret Zone Plate increases 1.63 times and resolution increases 1.2 times (with minimal beam waist about of 0.67 of wavelength and depth of focus about 5.72 of wavelength). By dynamically controlling the size of the amplitude pupil mask, it is possible to quickly control the depth of focus of an acoustic lens.

Original languageEnglish
Pages (from-to)183-187
Number of pages5
JournalSensors and Actuators, A: Physical
Volume286
DOIs
Publication statusPublished - 1 Feb 2019

Fingerprint

pupils
lenses
Lenses
Optical resolving power
Diffraction
diffraction
masks
Masks
Acoustic imaging
Wavelength
wavelengths
Water tanks
topology
apertures
acoustics
Topology
rings
water
simulation

Keywords

  • Acoustic Bessel beam
  • Axicon
  • Ultrasonic lens

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering

Cite this

Tunable depth of focus of acoustical pupil masked Soret Zone Plate. / Castiñeira-Ibáñez, Sergio; Tarrazó-Serrano, Daniel; Minin, Oleg V.; Rubio, Constanza; Minin, Igor V.

In: Sensors and Actuators, A: Physical, Vol. 286, 01.02.2019, p. 183-187.

Research output: Contribution to journalArticle

Castiñeira-Ibáñez, Sergio ; Tarrazó-Serrano, Daniel ; Minin, Oleg V. ; Rubio, Constanza ; Minin, Igor V. / Tunable depth of focus of acoustical pupil masked Soret Zone Plate. In: Sensors and Actuators, A: Physical. 2019 ; Vol. 286. pp. 183-187.
@article{d33bf2319de547cdba11e5e5a72061f8,
title = "Tunable depth of focus of acoustical pupil masked Soret Zone Plate",
abstract = "In acoustical lenses both resolution and depth of focus are determined by diffraction and the smaller the lens aperture the worse the resolution and the greater the depth of focus. Diffraction-limited resolution has a Soret Zone Plate, but a long depth of focus has an axicon. Nevertheless, these are two different devices each of which requires its own independent design. In this paper, we have shown that the transition from focusing to a diffraction limited spot to a quasi-diffraction free beam can be realized in the same focusing device without changing its topology. It has been shown that using a classical planar Soret Zone Plate lens made of a concentric array of circular aperiodical rings with an amplitude pupil mask placed closely to the surface of lens allows to form a quasi-Bessel beams under specific conditions, part of a diffracted wave collimates, producing an elongated focus. Experiments are performed in water tanks in order to verify the simulation results. Experimental verification shown that the depth of focus of a pupil-masked Soret Zone Plate increases 1.63 times and resolution increases 1.2 times (with minimal beam waist about of 0.67 of wavelength and depth of focus about 5.72 of wavelength). By dynamically controlling the size of the amplitude pupil mask, it is possible to quickly control the depth of focus of an acoustic lens.",
keywords = "Acoustic Bessel beam, Axicon, Ultrasonic lens",
author = "Sergio Casti{\~n}eira-Ib{\'a}{\~n}ez and Daniel Tarraz{\'o}-Serrano and Minin, {Oleg V.} and Constanza Rubio and Minin, {Igor V.}",
year = "2019",
month = "2",
day = "1",
doi = "10.1016/j.sna.2018.11.053",
language = "English",
volume = "286",
pages = "183--187",
journal = "Sensors and Actuators, A: Physical",
issn = "0924-4247",
publisher = "Elsevier",

}

TY - JOUR

T1 - Tunable depth of focus of acoustical pupil masked Soret Zone Plate

AU - Castiñeira-Ibáñez, Sergio

AU - Tarrazó-Serrano, Daniel

AU - Minin, Oleg V.

AU - Rubio, Constanza

AU - Minin, Igor V.

PY - 2019/2/1

Y1 - 2019/2/1

N2 - In acoustical lenses both resolution and depth of focus are determined by diffraction and the smaller the lens aperture the worse the resolution and the greater the depth of focus. Diffraction-limited resolution has a Soret Zone Plate, but a long depth of focus has an axicon. Nevertheless, these are two different devices each of which requires its own independent design. In this paper, we have shown that the transition from focusing to a diffraction limited spot to a quasi-diffraction free beam can be realized in the same focusing device without changing its topology. It has been shown that using a classical planar Soret Zone Plate lens made of a concentric array of circular aperiodical rings with an amplitude pupil mask placed closely to the surface of lens allows to form a quasi-Bessel beams under specific conditions, part of a diffracted wave collimates, producing an elongated focus. Experiments are performed in water tanks in order to verify the simulation results. Experimental verification shown that the depth of focus of a pupil-masked Soret Zone Plate increases 1.63 times and resolution increases 1.2 times (with minimal beam waist about of 0.67 of wavelength and depth of focus about 5.72 of wavelength). By dynamically controlling the size of the amplitude pupil mask, it is possible to quickly control the depth of focus of an acoustic lens.

AB - In acoustical lenses both resolution and depth of focus are determined by diffraction and the smaller the lens aperture the worse the resolution and the greater the depth of focus. Diffraction-limited resolution has a Soret Zone Plate, but a long depth of focus has an axicon. Nevertheless, these are two different devices each of which requires its own independent design. In this paper, we have shown that the transition from focusing to a diffraction limited spot to a quasi-diffraction free beam can be realized in the same focusing device without changing its topology. It has been shown that using a classical planar Soret Zone Plate lens made of a concentric array of circular aperiodical rings with an amplitude pupil mask placed closely to the surface of lens allows to form a quasi-Bessel beams under specific conditions, part of a diffracted wave collimates, producing an elongated focus. Experiments are performed in water tanks in order to verify the simulation results. Experimental verification shown that the depth of focus of a pupil-masked Soret Zone Plate increases 1.63 times and resolution increases 1.2 times (with minimal beam waist about of 0.67 of wavelength and depth of focus about 5.72 of wavelength). By dynamically controlling the size of the amplitude pupil mask, it is possible to quickly control the depth of focus of an acoustic lens.

KW - Acoustic Bessel beam

KW - Axicon

KW - Ultrasonic lens

UR - http://www.scopus.com/inward/record.url?scp=85059247348&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85059247348&partnerID=8YFLogxK

U2 - 10.1016/j.sna.2018.11.053

DO - 10.1016/j.sna.2018.11.053

M3 - Article

VL - 286

SP - 183

EP - 187

JO - Sensors and Actuators, A: Physical

JF - Sensors and Actuators, A: Physical

SN - 0924-4247

ER -