GB2221563B - Optical head - Google Patents

Optical head

Info

Publication number
GB2221563B
GB2221563B GB8922654A GB8922654A GB2221563B GB 2221563 B GB2221563 B GB 2221563B GB 8922654 A GB8922654 A GB 8922654A GB 8922654 A GB8922654 A GB 8922654A GB 2221563 B GB2221563 B GB 2221563B
Authority
GB
United Kingdom
Prior art keywords
optical head
optical
head
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 - Lifetime
Application number
GB8922654A
Other versions
GB2221563A (en
GB8922654D0 (en
Inventor
Kazuo Minoura
Kenichi Suzuki
Satoshi Shikichi
Kazuhiko Matsuoka
Hideki Hosoya
Akio Aoki
Masahiko Enari
Masayuki Usui
Hiroshi Matsuoka
Fumiaki Kawaguchi
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.)
Canon Inc
Original Assignee
Canon Inc
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
Priority claimed from JP60072042A external-priority patent/JP2556465B2/en
Application filed by Canon Inc filed Critical Canon Inc
Publication of GB8922654D0 publication Critical patent/GB8922654D0/en
Publication of GB2221563A publication Critical patent/GB2221563A/en
Application granted granted Critical
Publication of GB2221563B publication Critical patent/GB2221563B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/20—Driving; Starting; Stopping; Control thereof
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/01—Details
    • G06K7/015—Aligning or centering of the sensing device with respect to the record carrier
    • 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
    • G11B7/002—Recording, reproducing or erasing systems characterised by the shape or form of the carrier
    • G11B7/0033—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with cards or other card-like flat carriers, e.g. flat sheets of optical film
    • 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
    • G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
    • G11B7/08505—Methods for track change, selection or preliminary positioning by moving the head
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00—Packet switching elements
    • H04L49/10—Packet switching elements characterised by the switching fabric construction
    • H04L49/104—Asynchronous transfer mode [ATM] switching fabrics
    • H04L49/105—ATM switching elements
    • H04L49/106—ATM switching elements using space switching, e.g. crossbar or matrix

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Recording Or Reproduction (AREA)
GB8922654A 1985-04-05 1989-10-09 Optical head Expired - Lifetime GB2221563B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP60072042A JP2556465B2 (en) 1985-04-05 1985-04-05 Optical head access method for recording / reproducing apparatus
GB8608345A GB2174531B (en) 1985-04-05 1986-04-04 Moving an optical head

Publications (3)

Publication Number Publication Date
GB8922654D0 GB8922654D0 (en) 1989-11-22
GB2221563A GB2221563A (en) 1990-02-07
GB2221563B true GB2221563B (en) 1990-06-20

Family

ID=26290597

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8922654A Expired - Lifetime GB2221563B (en) 1985-04-05 1989-10-09 Optical head

Country Status (1)

Country Link
GB (1) GB2221563B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5638345A (en) * 1993-08-25 1997-06-10 Canon Kabushiki Kaisha Information recording and/or reproducing apparatus and method for use with a multi-track optical recording medium

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1073875A (en) * 1964-12-16 1967-06-28 Ibm A system for cyclically generating a control signal for controlling the operation of a positionable mechanism
GB1573563A (en) * 1976-03-25 1980-08-28 Blazevic M Means for rocording and reproducing sounds and displaying an associated written test
GB2055503A (en) * 1979-07-30 1981-03-04 Atlantic Richfield Co Information carrier
GB2092791A (en) * 1981-02-02 1982-08-18 Smiths Industries Plc Record carriers
EP0077641A2 (en) * 1981-10-15 1983-04-27 BURROUGHS CORPORATION (a Delaware corporation) Method for improved focusing control in an optical memory system
WO1984002221A1 (en) * 1982-11-30 1984-06-07 George Saint Data storage devices
WO1984004990A1 (en) * 1983-06-07 1984-12-20 Storage Technology Partners A system and method for organizing and managing data stored on an informational disk
WO1985001818A1 (en) * 1983-10-12 1985-04-25 Drexler Technology Corporation Quad density optical data system
GB2161632A (en) * 1984-07-09 1986-01-15 Drexler Tech Scanning optical card reader
GB2171551A (en) * 1984-12-31 1986-08-28 Canon Kk Reversing transducer or record movement in recording/reproducing apparatus
GB2174530A (en) * 1985-03-29 1986-11-05 Canon Kk Optical record medium (card) recording/reproduction

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1073875A (en) * 1964-12-16 1967-06-28 Ibm A system for cyclically generating a control signal for controlling the operation of a positionable mechanism
GB1573563A (en) * 1976-03-25 1980-08-28 Blazevic M Means for rocording and reproducing sounds and displaying an associated written test
GB2055503A (en) * 1979-07-30 1981-03-04 Atlantic Richfield Co Information carrier
GB2092791A (en) * 1981-02-02 1982-08-18 Smiths Industries Plc Record carriers
EP0077641A2 (en) * 1981-10-15 1983-04-27 BURROUGHS CORPORATION (a Delaware corporation) Method for improved focusing control in an optical memory system
WO1984002221A1 (en) * 1982-11-30 1984-06-07 George Saint Data storage devices
WO1984004990A1 (en) * 1983-06-07 1984-12-20 Storage Technology Partners A system and method for organizing and managing data stored on an informational disk
WO1985001818A1 (en) * 1983-10-12 1985-04-25 Drexler Technology Corporation Quad density optical data system
GB2161632A (en) * 1984-07-09 1986-01-15 Drexler Tech Scanning optical card reader
GB2171551A (en) * 1984-12-31 1986-08-28 Canon Kk Reversing transducer or record movement in recording/reproducing apparatus
GB2174530A (en) * 1985-03-29 1986-11-05 Canon Kk Optical record medium (card) recording/reproduction

Also Published As

Publication number Publication date
GB2221563A (en) 1990-02-07
GB8922654D0 (en) 1989-11-22

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Legal Events

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

Effective date: 20060403