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FR2368108A1 - High resolution detector for ultrasonic scanner - uses array of fluid crystals between polarising filters with sonic sources in transmission or reflection mode - Google Patents

High resolution detector for ultrasonic scanner - uses array of fluid crystals between polarising filters with sonic sources in transmission or reflection mode

Info

Publication number
FR2368108A1
FR2368108A1 FR7730348A FR7730348A FR2368108A1 FR 2368108 A1 FR2368108 A1 FR 2368108A1 FR 7730348 A FR7730348 A FR 7730348A FR 7730348 A FR7730348 A FR 7730348A FR 2368108 A1 FR2368108 A1 FR 2368108A1
Authority
FR
France
Prior art keywords
transmission
reflection mode
high resolution
ultrasonic scanner
polarising filters
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.)
Withdrawn
Application number
FR7730348A
Other languages
French (fr)
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.)
ARCO AG
Original Assignee
ARCO AG
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 ARCO AG filed Critical ARCO AG
Publication of FR2368108A1 publication Critical patent/FR2368108A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
    • G01H9/002—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means for representing acoustic field distribution
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Liquid Crystal (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

The ultrasonic scanner has liq. crystal detectors spaced between polarising filters (2, 3) with the ultrasonic sources operating in transmission or reflection mode. The control circuit for the crystal detectors is simpler than conventional detectors. The layout has high spatial resolution and sensitivity, as well as a simplified optics. The detector does not have to be immersed in a water bath as is usual practice. Nematic rotary cells of liq. crystal (1) are inserted between the polarisation paths (2', 3') of a flat-type receiver. A sonic source (4, 5) is mechanically and acoustically coupled to the object (6) to be observed. The cells of excited by the reflected waves.
FR7730348A 1976-10-12 1977-10-10 High resolution detector for ultrasonic scanner - uses array of fluid crystals between polarising filters with sonic sources in transmission or reflection mode Withdrawn FR2368108A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1285676 1976-10-12

Publications (1)

Publication Number Publication Date
FR2368108A1 true FR2368108A1 (en) 1978-05-12

Family

ID=4387040

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7730348A Withdrawn FR2368108A1 (en) 1976-10-12 1977-10-10 High resolution detector for ultrasonic scanner - uses array of fluid crystals between polarising filters with sonic sources in transmission or reflection mode

Country Status (4)

Country Link
JP (1) JPS5348790A (en)
DE (1) DE2742220A1 (en)
FR (1) FR2368108A1 (en)
IT (1) IT1087925B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0010492A3 (en) * 1978-10-13 1980-05-14 Jean-Luc Dion Liquid crystal acousto-optic cell and visualisation device comprising such a cell
EP0089841A1 (en) * 1982-03-22 1983-09-28 Raj Technology Partnership Method and apparatus for measuring the intensity of an acoustic field
EP0122342A1 (en) * 1981-09-08 1984-10-24 Raj Technology Partnership Portable liquid crystal testing device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0010492A3 (en) * 1978-10-13 1980-05-14 Jean-Luc Dion Liquid crystal acousto-optic cell and visualisation device comprising such a cell
US4338821A (en) 1978-10-13 1982-07-13 Dion Jean Luc Liquid crystal cell for acoustical imaging
EP0122342A1 (en) * 1981-09-08 1984-10-24 Raj Technology Partnership Portable liquid crystal testing device
EP0089841A1 (en) * 1982-03-22 1983-09-28 Raj Technology Partnership Method and apparatus for measuring the intensity of an acoustic field

Also Published As

Publication number Publication date
JPS5348790A (en) 1978-05-02
DE2742220A1 (en) 1978-04-13
IT1087925B (en) 1985-06-04

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Legal Events

Date Code Title Description
ST Notification of lapse