GB1028250A - Semi-conductor conversion device for converting mechanical vibrations into electrical signals - Google Patents

Semi-conductor conversion device for converting mechanical vibrations into electrical signals

Info

Publication number
GB1028250A
GB1028250A GB487965A GB487965A GB1028250A GB 1028250 A GB1028250 A GB 1028250A GB 487965 A GB487965 A GB 487965A GB 487965 A GB487965 A GB 487965A GB 1028250 A GB1028250 A GB 1028250A
Authority
GB
United Kingdom
Prior art keywords
light
source
detector
diode
reflector
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
GB487965A
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Publication of GB1028250A publication Critical patent/GB1028250A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00
    • H04R23/006—Transducers other than those covered by groups H04R9/00 - H04R21/00 using solid state devices
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • General Physics & Mathematics (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

1,028,250. Light modulating. HITACHI SEISAKUSHO KABUSHIKI KAISHA. Feb. 4, 1965 [Feb. 15, 1964], No. 4879/65. Heading H4F. [Also in Division G1] A device for converting mechanical vibrations into electrical signals comprises a lightemitting diode and light detecting means, the vibrations being applied to modulate the position of the source relative to the detector or to move a reflector in the light path to cause a variation in the light received from the source by the detector. The light-emitting diode may comprise a GaAs crystal having a PN boundary layer, at one end of which is a metallic reflector, so that coherent light is obtained from the opposite end of the layer. The light is of maximum intensity in the plane of the boundary. The diode may be mounted on a microphone diaphragm 9 and coupled to a forward bias source 10. As shown, the detector 12 is a mesa-type photo-diode 12 with the light from the source in equilibrium position falling on its centre. In a record-player pick-up the light path between a source and a detector of the types described includes a reflector mounted on one end of an arm. The opposite end of the arm carries the playing stylus and there is provided a mounting means having a damping effect between the two.
GB487965A 1964-02-15 1965-02-04 Semi-conductor conversion device for converting mechanical vibrations into electrical signals Expired GB1028250A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP799364 1964-02-15

Publications (1)

Publication Number Publication Date
GB1028250A true GB1028250A (en) 1966-05-04

Family

ID=11680913

Family Applications (1)

Application Number Title Priority Date Filing Date
GB487965A Expired GB1028250A (en) 1964-02-15 1965-02-04 Semi-conductor conversion device for converting mechanical vibrations into electrical signals

Country Status (2)

Country Link
DE (1) DE1473973A1 (en)
GB (1) GB1028250A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3210086A1 (en) * 1982-03-19 1983-09-22 Siemens AG, 1000 Berlin und 8000 München LUMINESCENCE DIODE, SUITABLE AS PRESSURE SENSOR

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3201873C2 (en) * 1982-01-22 1984-02-02 Angewandte Digital Elektronik Gmbh, 2051 Brunstorf Deflection sensor
DE3932056A1 (en) * 1989-09-26 1991-04-04 Eduard Dr Rer Nat Preuss Opto-electronic surface vibration measurer - uses reflection light barrier, voltage sources, resistors, amplifier and reflector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3210086A1 (en) * 1982-03-19 1983-09-22 Siemens AG, 1000 Berlin und 8000 München LUMINESCENCE DIODE, SUITABLE AS PRESSURE SENSOR

Also Published As

Publication number Publication date
DE1473973A1 (en) 1969-01-23

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