FR2369768A1 - Transducteur ultrasonore a distance focale variable - Google Patents

Transducteur ultrasonore a distance focale variable

Info

Publication number
FR2369768A1
FR2369768A1 FR7710833A FR7710833A FR2369768A1 FR 2369768 A1 FR2369768 A1 FR 2369768A1 FR 7710833 A FR7710833 A FR 7710833A FR 7710833 A FR7710833 A FR 7710833A FR 2369768 A1 FR2369768 A1 FR 2369768A1
Authority
FR
France
Prior art keywords
focal length
variable focal
ultrasonic transducer
focal distance
hand
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.)
Pending
Application number
FR7710833A
Other languages
English (en)
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.)
SRI International Inc
Original Assignee
Stanford Research Institute
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 Stanford Research Institute filed Critical Stanford Research Institute
Publication of FR2369768A1 publication Critical patent/FR2369768A1/fr
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
    • B06B1/0607—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements
    • B06B1/0622—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements on one surface
    • B06B1/0625—Annular array
    • 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
    • G10K11/32—Sound-focusing or directing, e.g. scanning characterised by the shape of the source

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Transducers For Ultrasonic Waves (AREA)

Abstract

L'invention concerne les transducteurs ultrasonores à distance focale variable. Elle se rapporte à un transducteur qui comprend d'une part un corps 12 de matière piézoélectrique portant des électrodes 14-1, 14-2, 14-3 et 16 et d'autre part une lentille 24 à distance focale fixe. De cette manière, la plage de variations de la distance focale, pour un même transducteur, est déplacée vers les faibles valeurs de la distance focale. Application à la réalisation de transducteurs ultrasonores à distance focale variable.
FR7710833A 1976-11-01 1977-04-08 Transducteur ultrasonore a distance focale variable Pending FR2369768A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US73770476A 1976-11-01 1976-11-01

Publications (1)

Publication Number Publication Date
FR2369768A1 true FR2369768A1 (fr) 1978-05-26

Family

ID=24964959

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7710833A Pending FR2369768A1 (fr) 1976-11-01 1977-04-08 Transducteur ultrasonore a distance focale variable

Country Status (5)

Country Link
JP (1) JPS5357090A (fr)
DE (1) DE2712341A1 (fr)
FR (1) FR2369768A1 (fr)
GB (1) GB1554349A (fr)
NL (1) NL7712029A (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2377134A1 (fr) * 1977-01-06 1978-08-04 Stanford Research Inst Transducteur d'examen a ultrasons
FR2448155A1 (fr) * 1979-02-01 1980-08-29 Mediscan Inc Appareil ultrasonique de diagnostic medical
EP0068961A2 (fr) * 1981-06-26 1983-01-05 Thomson-Csf Dispositif d'échauffement localisé de tissus biologiques
FR2523451A2 (fr) * 1982-03-19 1983-09-23 Thomson Csf Dispositif d'echauffement localise de tissus biologiques
FR2580079A1 (en) * 1985-04-05 1986-10-10 Edap Ultrasonic echographic device incorporating a probe with adjustable focal length and means of obtaining a large depth of field with a high resolving power
EP0308644A2 (fr) * 1987-09-24 1989-03-29 Richard Wolf GmbH Transducteur ultrasonore focalisé

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4227417A (en) * 1977-06-13 1980-10-14 New York Institute Of Technology Dynamic focusing apparatus and method
JPS5584154A (en) * 1978-12-19 1980-06-25 Matsushita Electric Ind Co Ltd Ultrasoniccwave diagnosis device
US4414482A (en) * 1981-05-20 1983-11-08 Siemens Gammasonics, Inc. Non-resonant ultrasonic transducer array for a phased array imaging system using1/4 λ piezo elements
US4534221A (en) * 1982-09-27 1985-08-13 Technicare Corporation Ultrasonic diagnostic imaging systems for varying depths of field
USRE33590E (en) 1983-12-14 1991-05-21 Edap International, S.A. Method for examining, localizing and treating with ultrasound
US5143073A (en) 1983-12-14 1992-09-01 Edap International, S.A. Wave apparatus system
DE3441563A1 (de) * 1984-11-14 1985-05-30 Michael Dipl.-Phys. 5600 Wuppertal Platte Kombinierte ultraschallwandler aus keramischen und hochpolymeren piezoelektrischen materialien
DE3510341C2 (de) * 1985-03-22 1987-03-19 Richard Wolf Gmbh, 7134 Knittlingen Schallsender zur Erzeugung akustischer Impulse
DE3833234C2 (de) * 1988-09-30 1995-03-16 Wolfgang Kessler Verfahren zum Kalibrieren oder Prüfen eines piezokeramischen Wandlers
JPH02234600A (ja) * 1989-03-07 1990-09-17 Mitsubishi Mining & Cement Co Ltd 圧電変換素子
JP2745147B2 (ja) * 1989-03-27 1998-04-28 三菱マテリアル 株式会社 圧電変換素子
US5158085A (en) * 1989-09-29 1992-10-27 Richard Wolf Gmbh Lithotripsy ultrasound locating device
GB2250658A (en) * 1990-12-07 1992-06-10 Canon Res Ct Europe Ltd Loudspeaker
DE102008005971A1 (de) * 2008-01-24 2009-07-30 Ge Inspection Technologies Gmbh Vorrichtung und Verfahren zur zerstörungsfreien Prüfung eines Prüflings mittels Ultraschall-TOFD-Technik
DE102008028200B4 (de) 2008-06-12 2013-01-31 Karlsruher Institut für Technologie Ultraschallwandler mit variabler Fokuseinstellung
DE102015209234A1 (de) * 2015-05-20 2016-11-24 Robert Bosch Gmbh Vorrichtung zum Aussenden und/oder Empfangen akustischer Signale

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3474402A (en) * 1968-05-06 1969-10-21 Us Navy Variable focus electroacoustic transducer
DE2641265A1 (de) * 1975-09-15 1977-03-17 Commw Of Australia Ultraschallwandleranordnung
AU483477B2 (en) * 1972-06-08 1977-05-18 Commonwealth Of Australia, The Wide aperture ultrasonic array

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3474402A (en) * 1968-05-06 1969-10-21 Us Navy Variable focus electroacoustic transducer
AU483477B2 (en) * 1972-06-08 1977-05-18 Commonwealth Of Australia, The Wide aperture ultrasonic array
DE2641265A1 (de) * 1975-09-15 1977-03-17 Commw Of Australia Ultraschallwandleranordnung
FR2324004A1 (fr) * 1975-09-15 1977-04-08 Commw Of Australia Perfectionnements apportes aux dispositifs pour l'examen ultrasonique

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2377134A1 (fr) * 1977-01-06 1978-08-04 Stanford Research Inst Transducteur d'examen a ultrasons
FR2448155A1 (fr) * 1979-02-01 1980-08-29 Mediscan Inc Appareil ultrasonique de diagnostic medical
EP0068961A2 (fr) * 1981-06-26 1983-01-05 Thomson-Csf Dispositif d'échauffement localisé de tissus biologiques
EP0068961A3 (fr) * 1981-06-26 1983-02-02 Thomson-Csf Dispositif d'échauffement localisé de tissus biologiques
FR2523451A2 (fr) * 1982-03-19 1983-09-23 Thomson Csf Dispositif d'echauffement localise de tissus biologiques
FR2580079A1 (en) * 1985-04-05 1986-10-10 Edap Ultrasonic echographic device incorporating a probe with adjustable focal length and means of obtaining a large depth of field with a high resolving power
EP0308644A2 (fr) * 1987-09-24 1989-03-29 Richard Wolf GmbH Transducteur ultrasonore focalisé
EP0308644A3 (en) * 1987-09-24 1990-05-30 Richard Wolf Gmbh Focusing ultrasonic transducer

Also Published As

Publication number Publication date
JPS5357090A (en) 1978-05-24
DE2712341A1 (de) 1978-05-03
NL7712029A (nl) 1978-05-03
GB1554349A (en) 1979-10-17

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