Producing deep depth of field and depth-independent resolution in NDE with limited diffraction beams

Research output: Contribution to journalArticle

60 Citations (Scopus)

Abstract

Limited diffraction beams, such as Durnin's J0 Bessel beam, are a class of nonspreading solutions to the isotropic/homogeneous scalar wave equation. These beams can be approximately produced with finite aperture and energy over a deep depth of field. In this paper, we report the application of a broadband J0 Bessel beam to nondestructive evaluation (NDE) of materials. Pulse-echo images of a stainless steel block phantom were obtained with both the J0 Bessel beam and a conventional focused Gaussian beam. Results show that uniformly high resolutions were obtained with the J0 Bessel beam over a large distance. In addition, the lateral resolution of the J0 Bessel beam is almost independent of the speed of sound of the materials inspected. In contrast, the lateral resolution of images obtained with the conventional focused Gaussian beam changes dramatically with the distance and the focal length of the beam in water is greatly reduced by the steel block. Therefore, limited diffraction beams could be useful for nondestructive evaluation of materials of different speeds of sound. Restoration of pulse-echo images obtained with these beams could be simplified.

Original languageEnglish (US)
Pages (from-to)134-149
Number of pages16
JournalUltrasonic Imaging
Volume15
Issue number2
DOIs
StatePublished - 1993

Fingerprint

evaluation
Steel
Stainless Steel
diffraction
Water
echoes
acoustics
pulses
restoration
wave equations
stainless steels
apertures
steels
scalars
broadband
high resolution
water

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Acoustics and Ultrasonics

Cite this

Producing deep depth of field and depth-independent resolution in NDE with limited diffraction beams. / Lu, J. Y.; Greenleaf, James F.

In: Ultrasonic Imaging, Vol. 15, No. 2, 1993, p. 134-149.

Research output: Contribution to journalArticle

@article{a8973c3f72d5484faf9a87ebee57cad0,
title = "Producing deep depth of field and depth-independent resolution in NDE with limited diffraction beams",
abstract = "Limited diffraction beams, such as Durnin's J0 Bessel beam, are a class of nonspreading solutions to the isotropic/homogeneous scalar wave equation. These beams can be approximately produced with finite aperture and energy over a deep depth of field. In this paper, we report the application of a broadband J0 Bessel beam to nondestructive evaluation (NDE) of materials. Pulse-echo images of a stainless steel block phantom were obtained with both the J0 Bessel beam and a conventional focused Gaussian beam. Results show that uniformly high resolutions were obtained with the J0 Bessel beam over a large distance. In addition, the lateral resolution of the J0 Bessel beam is almost independent of the speed of sound of the materials inspected. In contrast, the lateral resolution of images obtained with the conventional focused Gaussian beam changes dramatically with the distance and the focal length of the beam in water is greatly reduced by the steel block. Therefore, limited diffraction beams could be useful for nondestructive evaluation of materials of different speeds of sound. Restoration of pulse-echo images obtained with these beams could be simplified.",
author = "Lu, {J. Y.} and Greenleaf, {James F}",
year = "1993",
doi = "10.1006/uimg.1993.1011",
language = "English (US)",
volume = "15",
pages = "134--149",
journal = "Ultrasonic Imaging",
issn = "0161-7346",
publisher = "Dynamedia Inc.",
number = "2",

}

TY - JOUR

T1 - Producing deep depth of field and depth-independent resolution in NDE with limited diffraction beams

AU - Lu, J. Y.

AU - Greenleaf, James F

PY - 1993

Y1 - 1993

N2 - Limited diffraction beams, such as Durnin's J0 Bessel beam, are a class of nonspreading solutions to the isotropic/homogeneous scalar wave equation. These beams can be approximately produced with finite aperture and energy over a deep depth of field. In this paper, we report the application of a broadband J0 Bessel beam to nondestructive evaluation (NDE) of materials. Pulse-echo images of a stainless steel block phantom were obtained with both the J0 Bessel beam and a conventional focused Gaussian beam. Results show that uniformly high resolutions were obtained with the J0 Bessel beam over a large distance. In addition, the lateral resolution of the J0 Bessel beam is almost independent of the speed of sound of the materials inspected. In contrast, the lateral resolution of images obtained with the conventional focused Gaussian beam changes dramatically with the distance and the focal length of the beam in water is greatly reduced by the steel block. Therefore, limited diffraction beams could be useful for nondestructive evaluation of materials of different speeds of sound. Restoration of pulse-echo images obtained with these beams could be simplified.

AB - Limited diffraction beams, such as Durnin's J0 Bessel beam, are a class of nonspreading solutions to the isotropic/homogeneous scalar wave equation. These beams can be approximately produced with finite aperture and energy over a deep depth of field. In this paper, we report the application of a broadband J0 Bessel beam to nondestructive evaluation (NDE) of materials. Pulse-echo images of a stainless steel block phantom were obtained with both the J0 Bessel beam and a conventional focused Gaussian beam. Results show that uniformly high resolutions were obtained with the J0 Bessel beam over a large distance. In addition, the lateral resolution of the J0 Bessel beam is almost independent of the speed of sound of the materials inspected. In contrast, the lateral resolution of images obtained with the conventional focused Gaussian beam changes dramatically with the distance and the focal length of the beam in water is greatly reduced by the steel block. Therefore, limited diffraction beams could be useful for nondestructive evaluation of materials of different speeds of sound. Restoration of pulse-echo images obtained with these beams could be simplified.

UR - http://www.scopus.com/inward/record.url?scp=0027272244&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0027272244&partnerID=8YFLogxK

U2 - 10.1006/uimg.1993.1011

DO - 10.1006/uimg.1993.1011

M3 - Article

C2 - 8346611

AN - SCOPUS:0027272244

VL - 15

SP - 134

EP - 149

JO - Ultrasonic Imaging

JF - Ultrasonic Imaging

SN - 0161-7346

IS - 2

ER -