USH2049H1 - Differential property sensitive acoustic lens - Google Patents

Differential property sensitive acoustic lens Download PDF

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Publication number
USH2049H1
USH2049H1 US09478562A US47856200A USH2049H US H2049 H1 USH2049 H1 US H2049H1 US 09478562 A US09478562 A US 09478562A US 47856200 A US47856200 A US 47856200A US H2049 H USH2049 H US H2049H
Authority
US
United States
Prior art keywords
semicylindrical
acoustic lens
portions
flat
differential property
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US09478562A
Inventor
Shamachary Sathish
Mark J Ruddell
Robert L Crane
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
US Air Force
Original Assignee
US Air Force
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by US Air Force filed Critical US Air Force
Priority to US09478562A priority Critical patent/USH2049H1/en
Application granted granted Critical
Publication of USH2049H1 publication Critical patent/USH2049H1/en
Publication of USH2049H2 publication Critical patent/USH2049H2/en
Abandoned legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G01N29/24—Probes
    • G01N29/2437—Piezoelectric probes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/04—Analysing solids
    • G01N29/06—Visualisation of the interior, e.g. acoustic microscopy
    • G01N29/0654—Imaging
    • G01N29/0681—Imaging by acoustic microscopy, e.g. scanning acoustic microscopy
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G01N29/24—Probes
    • G01N29/2456—Focusing probes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G01N29/24—Probes
    • G01N29/2462—Probes with waveguides, e.g. SAW devices
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/18—Methods or devices for transmitting, conducting or directing sound
    • G10K11/26—Sound-focusing or directing, e.g. scanning
    • G10K11/30—Sound-focusing or directing, e.g. scanning using refraction, e.g. acoustic lenses
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/04—Wave modes and trajectories
    • G01N2291/042—Wave modes
    • G01N2291/0423—Surface waves, e.g. Rayleigh waves, Love waves

Abstract

A differential property sensitive acoustic lens for non-destructive materials evaluation is described which in a preferred embodiment comprises first and second substantially semicylindrical shaped portions of fused silica disposed in closely spaced relationship along an axial plane, a substantially spherical depression defined in one end of each semicylindrical portion and a flat defined on each semicylindrical portion at the other end, a piezoelectric transducer attached to the flat of each semicylindrical portion, and a paraffin coated aluminum film of preselected thickness disposed between and in laminar contact with the semicylindrical portions for preventing acoustic and electrical cross talk between the transducers and between the semicylindrical portions.
US09478562A 1998-08-24 2000-01-06 Differential property sensitive acoustic lens Abandoned USH2049H1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US09478562A USH2049H1 (en) 1998-08-24 2000-01-06 Differential property sensitive acoustic lens

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US14005798A 1998-08-24 1998-08-24
US09478562A USH2049H1 (en) 1998-08-24 2000-01-06 Differential property sensitive acoustic lens

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US14005798A Continuation 1998-08-24 1998-08-24

Publications (2)

Publication Number Publication Date
USH2049H1 true USH2049H1 (en) 2002-10-01
USH2049H2 USH2049H2 (en) 2002-10-01

Family

ID=22489555

Family Applications (1)

Application Number Title Priority Date Filing Date
US09478562A Abandoned USH2049H1 (en) 1998-08-24 2000-01-06 Differential property sensitive acoustic lens

Country Status (1)

Country Link
US (1) USH2049H1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080195003A1 (en) * 2007-02-08 2008-08-14 Sliwa John W High intensity focused ultrasound transducer with acoustic lens
US8616329B1 (en) * 2012-10-30 2013-12-31 The United States Of America As Represented By The Secretary Of The Air Force Air coupled acoustic aperiodic flat lens

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4852575A (en) * 1988-02-26 1989-08-01 North American Philips Corporation Ultrasound flow measurement apparatus
US4881618A (en) * 1986-06-06 1989-11-21 Olympus Optical Co., Ltd. Acoustic lens for use in acoustic microscope
US4967873A (en) * 1988-07-27 1990-11-06 Olympus Optical Co., Ltd. Acoustic lens apparatus
US5094108A (en) * 1990-09-28 1992-03-10 Korea Standards Research Institute Ultrasonic contact transducer for point-focussing surface waves

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4881618A (en) * 1986-06-06 1989-11-21 Olympus Optical Co., Ltd. Acoustic lens for use in acoustic microscope
US4852575A (en) * 1988-02-26 1989-08-01 North American Philips Corporation Ultrasound flow measurement apparatus
US4967873A (en) * 1988-07-27 1990-11-06 Olympus Optical Co., Ltd. Acoustic lens apparatus
US5094108A (en) * 1990-09-28 1992-03-10 Korea Standards Research Institute Ultrasonic contact transducer for point-focussing surface waves

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080195003A1 (en) * 2007-02-08 2008-08-14 Sliwa John W High intensity focused ultrasound transducer with acoustic lens
US8616329B1 (en) * 2012-10-30 2013-12-31 The United States Of America As Represented By The Secretary Of The Air Force Air coupled acoustic aperiodic flat lens

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