JPS6310490B2 - - Google Patents

Info

Publication number
JPS6310490B2
JPS6310490B2 JP57180250A JP18025082A JPS6310490B2 JP S6310490 B2 JPS6310490 B2 JP S6310490B2 JP 57180250 A JP57180250 A JP 57180250A JP 18025082 A JP18025082 A JP 18025082A JP S6310490 B2 JPS6310490 B2 JP S6310490B2
Authority
JP
Japan
Prior art keywords
optical head
light
prism
condenser lens
optical
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
JP57180250A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5971138A (ja
Inventor
Hiroshi Inada
Tadashi Nomura
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.)
NEC Corp
Original Assignee
Nippon Electric Co 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 Nippon Electric Co Ltd filed Critical Nippon Electric Co Ltd
Priority to JP57180250A priority Critical patent/JPS5971138A/ja
Priority to EP83303435A priority patent/EP0098076A1/en
Publication of JPS5971138A publication Critical patent/JPS5971138A/ja
Priority to US06/765,172 priority patent/US4615023A/en
Publication of JPS6310490B2 publication Critical patent/JPS6310490B2/ja
Granted 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
    • G11B7/08—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
    • G11B7/0901—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 for track following only
    • 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

Landscapes

  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)
JP57180250A 1982-06-14 1982-10-14 光学ヘツド Granted JPS5971138A (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP57180250A JPS5971138A (ja) 1982-10-14 1982-10-14 光学ヘツド
EP83303435A EP0098076A1 (en) 1982-06-14 1983-06-14 Beam access apparatus for optical disc system
US06/765,172 US4615023A (en) 1982-06-14 1985-08-12 Beam access apparatus for optical disc system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57180250A JPS5971138A (ja) 1982-10-14 1982-10-14 光学ヘツド

Publications (2)

Publication Number Publication Date
JPS5971138A JPS5971138A (ja) 1984-04-21
JPS6310490B2 true JPS6310490B2 (US07923587-20110412-C00022.png) 1988-03-07

Family

ID=16079981

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57180250A Granted JPS5971138A (ja) 1982-06-14 1982-10-14 光学ヘツド

Country Status (1)

Country Link
JP (1) JPS5971138A (US07923587-20110412-C00022.png)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6220183A (ja) * 1985-07-18 1987-01-28 Toshiba Corp トラツク飛び越し制御回路

Also Published As

Publication number Publication date
JPS5971138A (ja) 1984-04-21

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