JPS56163534A - Optical information recording carrier - Google Patents

Optical information recording carrier

Info

Publication number
JPS56163534A
JPS56163534A JP6763280A JP6763280A JPS56163534A JP S56163534 A JPS56163534 A JP S56163534A JP 6763280 A JP6763280 A JP 6763280A JP 6763280 A JP6763280 A JP 6763280A JP S56163534 A JPS56163534 A JP S56163534A
Authority
JP
Japan
Prior art keywords
track
transmissivity
pit
information recording
recording carrier
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
JP6763280A
Other languages
Japanese (ja)
Other versions
JPS631653B2 (en
Inventor
Tetsuo Hosomi
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP6763280A priority Critical patent/JPS56163534A/en
Publication of JPS56163534A publication Critical patent/JPS56163534A/en
Publication of JPS631653B2 publication Critical patent/JPS631653B2/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
    • 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
    • G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
    • 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
    • G11B7/0904—Dithered tracking systems

Abstract

PURPOSE:To increase the S/N of a reproduced signal for an optical information recording carrier, by detecting the information track with the diffraction of light and the tracking truck in the form of a variation of the reflectance or transmissivity of light. CONSTITUTION:An information pit 18 is provided on a certain track 20. A track 17 for meandering tracking has a certain frequency with the >=0.1mum amplitude to the track 20 formed by the pit 18 and also has a track pitch of <=1/2 track pitch of the track 20. The track 17 has a different reflectance or transmissivity from other parts. The high frequency component of a reproduced information signal is detected by the diffraction caused by the pit 18. While the low-frequency component is the signal that is detected mainly as a difference of the reflectance or the transmissivity caused by the track 17.
JP6763280A 1980-05-20 1980-05-20 Optical information recording carrier Granted JPS56163534A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6763280A JPS56163534A (en) 1980-05-20 1980-05-20 Optical information recording carrier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6763280A JPS56163534A (en) 1980-05-20 1980-05-20 Optical information recording carrier

Publications (2)

Publication Number Publication Date
JPS56163534A true JPS56163534A (en) 1981-12-16
JPS631653B2 JPS631653B2 (en) 1988-01-13

Family

ID=13350547

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6763280A Granted JPS56163534A (en) 1980-05-20 1980-05-20 Optical information recording carrier

Country Status (1)

Country Link
JP (1) JPS56163534A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5297125A (en) * 1989-08-25 1994-03-22 Sony Corporation Optical recording medium and information recording apparatus for recording bursts of low-pass filtered reproduce-only information in a wobbling pre-groove on the optical recording medium

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0543882Y2 (en) * 1988-11-02 1993-11-05
JPH0283048U (en) * 1988-12-12 1990-06-27

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54130102A (en) * 1978-03-16 1979-10-09 Philips Nv Method of writing information* recording carrier* recorded record carrier* and information writing and reading device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54130102A (en) * 1978-03-16 1979-10-09 Philips Nv Method of writing information* recording carrier* recorded record carrier* and information writing and reading device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5297125A (en) * 1989-08-25 1994-03-22 Sony Corporation Optical recording medium and information recording apparatus for recording bursts of low-pass filtered reproduce-only information in a wobbling pre-groove on the optical recording medium

Also Published As

Publication number Publication date
JPS631653B2 (en) 1988-01-13

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