JPS6120057B2 - - Google Patents

Info

Publication number
JPS6120057B2
JPS6120057B2 JP53032306A JP3230678A JPS6120057B2 JP S6120057 B2 JPS6120057 B2 JP S6120057B2 JP 53032306 A JP53032306 A JP 53032306A JP 3230678 A JP3230678 A JP 3230678A JP S6120057 B2 JPS6120057 B2 JP S6120057B2
Authority
JP
Japan
Prior art keywords
light
recording medium
beams
light beams
reading
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
JP53032306A
Other languages
English (en)
Japanese (ja)
Other versions
JPS54125005A (en
Inventor
Takashi Hamaoka
Tooru Musha
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.)
Olympus Corp
Original Assignee
Olympus Optical 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 Olympus Optical Co Ltd filed Critical Olympus Optical Co Ltd
Priority to JP3230678A priority Critical patent/JPS54125005A/ja
Publication of JPS54125005A publication Critical patent/JPS54125005A/ja
Publication of JPS6120057B2 publication Critical patent/JPS6120057B2/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
    • G11B7/0938—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 servo format, e.g. guide tracks, pilot signals

Landscapes

  • Optical Recording Or Reproduction (AREA)
JP3230678A 1978-03-23 1978-03-23 Optical reading method Granted JPS54125005A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3230678A JPS54125005A (en) 1978-03-23 1978-03-23 Optical reading method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3230678A JPS54125005A (en) 1978-03-23 1978-03-23 Optical reading method

Publications (2)

Publication Number Publication Date
JPS54125005A JPS54125005A (en) 1979-09-28
JPS6120057B2 true JPS6120057B2 (enrdf_load_stackoverflow) 1986-05-20

Family

ID=12355256

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3230678A Granted JPS54125005A (en) 1978-03-23 1978-03-23 Optical reading method

Country Status (1)

Country Link
JP (1) JPS54125005A (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5655806U (enrdf_load_stackoverflow) * 1979-10-02 1981-05-15
JPS5661045A (en) * 1979-10-25 1981-05-26 Olympus Optical Co Ltd Optical information reader
JP2857553B2 (ja) * 1992-11-05 1999-02-17 株式会社三協精機製作所 光ピックアップのビーム角度検出方法

Also Published As

Publication number Publication date
JPS54125005A (en) 1979-09-28

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