JPS5657391A - Ultrasonic oscillator - Google Patents

Ultrasonic oscillator

Info

Publication number
JPS5657391A
JPS5657391A JP13385079A JP13385079A JPS5657391A JP S5657391 A JPS5657391 A JP S5657391A JP 13385079 A JP13385079 A JP 13385079A JP 13385079 A JP13385079 A JP 13385079A JP S5657391 A JPS5657391 A JP S5657391A
Authority
JP
Japan
Prior art keywords
thickness
oscillator
sound field
increased
reduced
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
JP13385079A
Other languages
Japanese (ja)
Inventor
Junji Miyazaki
Hirohide Miwa
Nobushi Iwashita
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP13385079A priority Critical patent/JPS5657391A/en
Publication of JPS5657391A publication Critical patent/JPS5657391A/en
Pending legal-status Critical Current

Links

Classifications

    • 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

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

Abstract

PURPOSE:To eliminate the variance of intensity at a close-distance sound field, by forming the disk-type oscillator into a curved structure in which the thickness is reduced at the center part and increased at the circumference part respectively. CONSTITUTION:The oscillator 2 has the maximum amplitude at its thickness S= lambda/2 and has deterioration of the efficiency as the thickness is reduced or increased. In this connection, the thickness of the oscillator is set to lambda/2 at the center part and then increased toward the circumference. As a result, the waveform of a simple gauss-type distribution can be obtained even at a close-distance sound field as well as the waveform in which the side lobe is reduced greatly even at a long-distance sound field. Thus the quality of a picture can be improved.
JP13385079A 1979-10-17 1979-10-17 Ultrasonic oscillator Pending JPS5657391A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13385079A JPS5657391A (en) 1979-10-17 1979-10-17 Ultrasonic oscillator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13385079A JPS5657391A (en) 1979-10-17 1979-10-17 Ultrasonic oscillator

Publications (1)

Publication Number Publication Date
JPS5657391A true JPS5657391A (en) 1981-05-19

Family

ID=15114485

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13385079A Pending JPS5657391A (en) 1979-10-17 1979-10-17 Ultrasonic oscillator

Country Status (1)

Country Link
JP (1) JPS5657391A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4478085A (en) * 1981-08-18 1984-10-23 Tokyo Shibaura Denki Kabushiki Kaisha Ultrasound diagnosis apparatus
JPS6115900U (en) * 1984-06-29 1986-01-29 古野電気株式会社 Ultrasonic transducer
JPS62231588A (en) * 1986-03-31 1987-10-12 Ngk Spark Plug Co Ltd Piezoelectric wave transmitter
FR2658298A1 (en) * 1990-02-14 1991-08-16 Oreal METHOD AND APPARATUS FOR GENERATING AN ULTRASONIC WAVE WITH A VIEW TO ITS USE IN ECHOGRAPHY WITH OBTAINING A GOOD RESOLUTION.
US5415175A (en) * 1993-09-07 1995-05-16 Acuson Corporation Broadband phased array transducer design with frequency controlled two dimension capability and methods for manufacture thereof
US5438998A (en) * 1993-09-07 1995-08-08 Acuson Corporation Broadband phased array transducer design with frequency controlled two dimension capability and methods for manufacture thereof
US5743855A (en) * 1995-03-03 1998-04-28 Acuson Corporation Broadband phased array transducer design with frequency controlled two dimension capability and methods for manufacture thereof

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4478085A (en) * 1981-08-18 1984-10-23 Tokyo Shibaura Denki Kabushiki Kaisha Ultrasound diagnosis apparatus
JPS6115900U (en) * 1984-06-29 1986-01-29 古野電気株式会社 Ultrasonic transducer
JPS62231588A (en) * 1986-03-31 1987-10-12 Ngk Spark Plug Co Ltd Piezoelectric wave transmitter
FR2658298A1 (en) * 1990-02-14 1991-08-16 Oreal METHOD AND APPARATUS FOR GENERATING AN ULTRASONIC WAVE WITH A VIEW TO ITS USE IN ECHOGRAPHY WITH OBTAINING A GOOD RESOLUTION.
US5415175A (en) * 1993-09-07 1995-05-16 Acuson Corporation Broadband phased array transducer design with frequency controlled two dimension capability and methods for manufacture thereof
US5438998A (en) * 1993-09-07 1995-08-08 Acuson Corporation Broadband phased array transducer design with frequency controlled two dimension capability and methods for manufacture thereof
US5582177A (en) * 1993-09-07 1996-12-10 Acuson Corporation Broadband phased array transducer design with frequency controlled two dimension capability and methods for manufacture thereof
US5976090A (en) * 1993-09-07 1999-11-02 Acuson Corporation Broadband phased array transducer design with frequency controlled two dimension capability and methods for manufacture thereof
US5743855A (en) * 1995-03-03 1998-04-28 Acuson Corporation Broadband phased array transducer design with frequency controlled two dimension capability and methods for manufacture thereof

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