GB2109583B - Optical head devices for generating and controlling a light beam - Google Patents

Optical head devices for generating and controlling a light beam

Info

Publication number
GB2109583B
GB2109583B GB08231383A GB8231383A GB2109583B GB 2109583 B GB2109583 B GB 2109583B GB 08231383 A GB08231383 A GB 08231383A GB 8231383 A GB8231383 A GB 8231383A GB 2109583 B GB2109583 B GB 2109583B
Authority
GB
United Kingdom
Prior art keywords
generating
controlling
light beam
optical head
head devices
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
GB08231383A
Other versions
GB2109583A (en
Inventor
Hiroshi Ohki
Chiaki Kojima
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Publication of GB2109583A publication Critical patent/GB2109583A/en
Application granted granted Critical
Publication of GB2109583B publication Critical patent/GB2109583B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1356—Double or multiple prisms, i.e. having two or more prisms in cooperation
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1353—Diffractive elements, e.g. holograms or gratings
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G02B27/16—Beam splitting or combining systems used as aids for focusing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0925—Electromechanical actuators for lens positioning
    • G11B7/093—Electromechanical actuators for lens positioning for focusing and tracking
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0925—Electromechanical actuators for lens positioning
    • G11B7/0937—Piezoelectric actuators

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Head (AREA)
GB08231383A 1981-11-04 1982-11-03 Optical head devices for generating and controlling a light beam Expired GB2109583B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56176749A JPS5880139A (en) 1981-11-04 1981-11-04 Optical head

Publications (2)

Publication Number Publication Date
GB2109583A GB2109583A (en) 1983-06-02
GB2109583B true GB2109583B (en) 1985-07-17

Family

ID=16019131

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08231383A Expired GB2109583B (en) 1981-11-04 1982-11-03 Optical head devices for generating and controlling a light beam

Country Status (9)

Country Link
JP (1) JPS5880139A (en)
KR (1) KR880002635B1 (en)
AT (1) AT376510B (en)
AU (1) AU556305B2 (en)
CA (1) CA1177165A (en)
DE (1) DE3240734C2 (en)
FR (1) FR2519458B1 (en)
GB (1) GB2109583B (en)
NL (1) NL8204248A (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8304212A (en) * 1983-12-07 1984-10-01 Philips Nv SINGLE COLLIMATOR LENS WITH AN ASPHERIC SURFACE.
CA1258906A (en) * 1985-04-22 1989-08-29 Hiroshi Oinoue Semiconductor laser apparatus for optical head
JPS61269235A (en) * 1985-05-24 1986-11-28 Omron Tateisi Electronics Co Optical information processing device
JPS61269233A (en) * 1985-05-24 1986-11-28 Omron Tateisi Electronics Co Optical information processing device
JPH0687099B2 (en) * 1986-10-08 1994-11-02 富士通株式会社 Laser optical scanning device
CA2079620A1 (en) * 1991-10-25 1993-04-26 Roeland M. T. Hekker Holographic elements for an optical recording system
US5272690A (en) * 1992-03-05 1993-12-21 International Business Machines Corporation Hologram element system
KR970703580A (en) * 1995-03-29 1997-07-03 제이.지.에이. 롤페스 Optical unit comprising a radiation source, a detector and a grating, and scanning device including the optical unit
GB0408383D0 (en) 2004-04-15 2004-05-19 Koninkl Philips Electronics Nv A radio network and a method of operating a radio network

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4003059A (en) * 1974-02-07 1977-01-11 Canon Kabushiki Kaisha Optical recorder having focus controlling means
NL176315C (en) * 1976-05-12 1985-03-18 Philips Nv OPTICAL SCANNER.
NL7608561A (en) * 1976-08-02 1978-02-06 Philips Nv OPTICAL READING UNIT FOR SCANNING A RECORD BEARING WITH A RADIATION-REFLECTING INFORMATION STRUCTURE.
CA1091966A (en) * 1976-10-15 1980-12-23 Chiaki Kojima Apparatus for reading signals recorded on a record carrier
US4245882A (en) * 1977-11-04 1981-01-20 Environmental Research Institute Of Michigan Doubly modulated on-axis thick hologram optical element
NL7713711A (en) * 1977-12-12 1979-06-14 Philips Nv OPTICAL READING UNIT FOR READING A MOVING DATA CARRIER, IN PARTICULAR FOR READING A VIDEO RECORD.
JPS54109801A (en) * 1978-02-17 1979-08-28 Toshiba Corp Optical reader
JPS5573934A (en) * 1978-11-20 1980-06-04 Mansei Kogyo Kk Reader for optical information
JPS55163566A (en) * 1979-06-05 1980-12-19 Sony Corp Hologram lens and its production and optical system signal using this hologram lens
JPS5647933A (en) * 1979-09-25 1981-04-30 Sony Corp Optical signal head
JPS5680836A (en) * 1979-12-07 1981-07-02 Seiko Instr & Electronics Ltd Optical information reader

Also Published As

Publication number Publication date
GB2109583A (en) 1983-06-02
DE3240734C2 (en) 1995-11-30
AT376510B (en) 1984-11-26
JPS5880139A (en) 1983-05-14
FR2519458A1 (en) 1983-07-08
AU556305B2 (en) 1986-10-30
ATA403082A (en) 1984-04-15
CA1177165A (en) 1984-10-30
FR2519458B1 (en) 1991-07-19
AU9007182A (en) 1983-05-12
KR840002561A (en) 1984-07-02
KR880002635B1 (en) 1988-12-07
DE3240734A1 (en) 1983-05-19
NL8204248A (en) 1983-06-01

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Effective date: 20021102