GB1487308A - Sensors of ultrasonic images - Google Patents

Sensors of ultrasonic images

Info

Publication number
GB1487308A
GB1487308A GB5065073A GB5065073A GB1487308A GB 1487308 A GB1487308 A GB 1487308A GB 5065073 A GB5065073 A GB 5065073A GB 5065073 A GB5065073 A GB 5065073A GB 1487308 A GB1487308 A GB 1487308A
Authority
GB
United Kingdom
Prior art keywords
acoustic
energy
transformers
ultrasonic energy
acoustic transformers
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.)
Expired
Application number
GB5065073A
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.)
EMI Ltd
Original Assignee
EMI 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 EMI Ltd filed Critical EMI Ltd
Priority to GB5065073A priority Critical patent/GB1487308A/en
Publication of GB1487308A publication Critical patent/GB1487308A/en
Expired 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
    • G10K11/28—Sound-focusing or directing, e.g. scanning using reflection, e.g. parabolic reflectors
    • 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)
  • Engineering & Computer Science (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

1487308 Cathode-ray tubes EMI Ltd 31 Oct 1974 [31 Oct 1973] 50650/73 Heading H1D [Also in Divisions H4J and H4X An ultrasonic radiation sensor which may form the faceplate of a TV camera tube or be secured to the faceplate of a camera tube by Canada balsam or other transparent adhesive comprises a plurality of acoustic transformers 2 (Fig. 1) for concentrating ultrasonic energy on to discrete areas 5 of a medium 1 sensitive to energy from such radiation. The acoustic transformers 2 comprise exponential horns 6. Alternatively the acoustic transformer are exponential apertures formed in a solid body (Fig. 2, not shown). The sensor preferably includes a liquid crystal 1 sandwiched between a transparent support 3, (which may be sealed in vacuum-tight manner to the envelope of the tube), and a membrane 4. The birefringance of the liquid crystal 1 is altered by the concentrated energy and this may be displayed using visible light shone from the direction of the ultrasonic energy, provided the acoustic transformers 2 are light transparent. The liquid crystals are only sensitive to ultrasonic energy above a threshold. The acoustic transformers 2 may be formed of glass, or of polystyrene, by casting or pressing using a die or mold.
GB5065073A 1974-10-31 1974-10-31 Sensors of ultrasonic images Expired GB1487308A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5065073A GB1487308A (en) 1974-10-31 1974-10-31 Sensors of ultrasonic images

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5065073A GB1487308A (en) 1974-10-31 1974-10-31 Sensors of ultrasonic images

Publications (1)

Publication Number Publication Date
GB1487308A true GB1487308A (en) 1977-09-28

Family

ID=10456789

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5065073A Expired GB1487308A (en) 1974-10-31 1974-10-31 Sensors of ultrasonic images

Country Status (1)

Country Link
GB (1) GB1487308A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0928640A1 (en) * 1998-01-12 1999-07-14 Imra Europe S.A. Ultrasonic transducer with a horn and phased array using such ultrasonic transducers
US20220291037A1 (en) * 2021-03-10 2022-09-15 Airbus Operations Sas Acoustic measuring device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0928640A1 (en) * 1998-01-12 1999-07-14 Imra Europe S.A. Ultrasonic transducer with a horn and phased array using such ultrasonic transducers
US20220291037A1 (en) * 2021-03-10 2022-09-15 Airbus Operations Sas Acoustic measuring device
US11808622B2 (en) * 2021-03-10 2023-11-07 Airbus Operations Sas Acoustic measuring device for reducing flow resonance

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee