JPS5764335A - Optical information reproducing device - Google Patents

Optical information reproducing device

Info

Publication number
JPS5764335A
JPS5764335A JP13801780A JP13801780A JPS5764335A JP S5764335 A JPS5764335 A JP S5764335A JP 13801780 A JP13801780 A JP 13801780A JP 13801780 A JP13801780 A JP 13801780A JP S5764335 A JPS5764335 A JP S5764335A
Authority
JP
Japan
Prior art keywords
lens
objective lens
split photodetector
split
optical information
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.)
Granted
Application number
JP13801780A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0146927B2 (enrdf_load_stackoverflow
Inventor
Kazuo Okada
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP13801780A priority Critical patent/JPS5764335A/ja
Publication of JPS5764335A publication Critical patent/JPS5764335A/ja
Publication of JPH0146927B2 publication Critical patent/JPH0146927B2/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
    • G11B7/0908—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 focusing only

Landscapes

  • Optical Head (AREA)
  • Automatic Focus Adjustment (AREA)
  • Optical Recording Or Reproduction (AREA)
JP13801780A 1980-10-01 1980-10-01 Optical information reproducing device Granted JPS5764335A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13801780A JPS5764335A (en) 1980-10-01 1980-10-01 Optical information reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13801780A JPS5764335A (en) 1980-10-01 1980-10-01 Optical information reproducing device

Publications (2)

Publication Number Publication Date
JPS5764335A true JPS5764335A (en) 1982-04-19
JPH0146927B2 JPH0146927B2 (enrdf_load_stackoverflow) 1989-10-11

Family

ID=15212102

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13801780A Granted JPS5764335A (en) 1980-10-01 1980-10-01 Optical information reproducing device

Country Status (1)

Country Link
JP (1) JPS5764335A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS623217A (ja) * 1985-06-28 1987-01-09 Agency Of Ind Science & Technol 焦点位置検出方式

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS623217A (ja) * 1985-06-28 1987-01-09 Agency Of Ind Science & Technol 焦点位置検出方式

Also Published As

Publication number Publication date
JPH0146927B2 (enrdf_load_stackoverflow) 1989-10-11

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