SE8106133L - RECORDER BEARING WITH AN OPTICALLY READABLE INFORMATION STRUCTURE AND APPARATUS FOR READING THE RECORDING BEARER - Google Patents

RECORDER BEARING WITH AN OPTICALLY READABLE INFORMATION STRUCTURE AND APPARATUS FOR READING THE RECORDING BEARER

Info

Publication number
SE8106133L
SE8106133L SE8106133A SE8106133A SE8106133L SE 8106133 L SE8106133 L SE 8106133L SE 8106133 A SE8106133 A SE 8106133A SE 8106133 A SE8106133 A SE 8106133A SE 8106133 L SE8106133 L SE 8106133L
Authority
SE
Sweden
Prior art keywords
phase
read
tracks
signals
depth
Prior art date
Application number
SE8106133A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE453543B (en
Inventor
J J M Braat
Original Assignee
Philips Nv
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 Philips Nv filed Critical Philips Nv
Publication of SE8106133L publication Critical patent/SE8106133L/en
Publication of SE453543B publication Critical patent/SE453543B/en

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
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
    • G11B7/24085—Pits
    • 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
    • G11B7/00736—Auxiliary data, e.g. lead-in, lead-out, Power Calibration Area [PCA], Burst Cutting Area [BCA], control information

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)

Abstract

A record carrier is described which has an optically readable information structure in which information areas 4, 4' of adjacent information track portions have different depths d1, d2 which in playback produce phase depths differing by pi /2 radians. The read apparatus comprises two detectors 22, 23 aligned in the track direction x in the far field 40, 41,42 of a read spot. An electronic relative phase shift is applied to the signals supplied by the two read detectors. To read tracks of one phase depth, the phase-shifted detector signals are subtracted from one another, cross-talk from the signals from the adjacent tracks of the other phase depth being substantially eliminated. To read the other phase depth tracks, the phase- shifted signals are added, again substantially eliminating cross-talk from adjacent tracks of the one phase depth. The electronic phase shift is selected in relation to the phase depth difference. <IMAGE>
SE8106133A 1981-07-24 1981-10-16 RECORDER BEARING WITH AN OPTICALLY READABLE INFORMATION STRUCTURE AND APPARATUS FOR READING THE RECORDING BEARER SE453543B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL8103504A NL8103504A (en) 1981-07-24 1981-07-24 RECORD CARRIER WITH AN OPTICALLY READABLE INFORMATION STRUCTURE AND DEVICE FOR READING IT.

Publications (2)

Publication Number Publication Date
SE8106133L true SE8106133L (en) 1983-01-25
SE453543B SE453543B (en) 1988-02-08

Family

ID=19837845

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8106133A SE453543B (en) 1981-07-24 1981-10-16 RECORDER BEARING WITH AN OPTICALLY READABLE INFORMATION STRUCTURE AND APPARATUS FOR READING THE RECORDING BEARER

Country Status (11)

Country Link
JP (2) JPS5819748A (en)
AT (1) AT371621B (en)
BE (1) BE890760A (en)
CA (1) CA1182916A (en)
DD (1) DD201625A5 (en)
DE (1) DE3141103A1 (en)
ES (1) ES506292A0 (en)
GB (1) GB2103409B (en)
IT (1) IT1140225B (en)
NL (1) NL8103504A (en)
SE (1) SE453543B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4121505A1 (en) * 1991-06-28 1993-01-07 Sonopress Prod DISK-SHAPED MEMORY FOR BINARY INFORMATION
KR100254509B1 (en) * 1992-02-14 2000-05-01 이데이 노부유끼 Data recording medium, data recording apparatus, data reproducing apparatus and data recording/reproducing apparatus
EP1067523A3 (en) * 1999-06-30 2007-05-23 Sharp Kabushiki Kaisha Optical disc having pits of different depth formed therein, optical disc device for reproduction the same, and method of reproduction
WO2008012985A1 (en) 2006-07-27 2008-01-31 Mitsubishi Electric Corporation Optical disc medium and optical disc device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7803517A (en) * 1978-04-03 1979-10-05 Philips Nv RECORD CARRIER WITH AN OPTICALLY READABLE PHASE STRUCTURE AND DEVICE FOR READING.
NL7810462A (en) * 1978-10-19 1980-04-22 Philips Nv REGISTRATION CONTAINER IN WHICH INFORMATION IS PRESENTED IN AN OPTICALLY READABLE RADIATION-REFLECTING INFORMATION STRUCTURE
CA1165871A (en) * 1978-11-08 1984-04-17 Kornelis Bulthuis Optically inscribable record carrier

Also Published As

Publication number Publication date
IT8124539A0 (en) 1981-10-16
NL8103504A (en) 1983-02-16
ES8207370A1 (en) 1982-09-01
CA1182916A (en) 1985-02-19
IT1140225B (en) 1986-09-24
JPH03116456A (en) 1991-05-17
JPH0421254B2 (en) 1992-04-09
DE3141103A1 (en) 1983-02-10
GB2103409A (en) 1983-02-16
BE890760A (en) 1982-04-16
JPH0366735B2 (en) 1991-10-18
SE453543B (en) 1988-02-08
DE3141103C2 (en) 1991-05-29
AT371621B (en) 1983-07-11
ES506292A0 (en) 1982-09-01
JPS5819748A (en) 1983-02-04
GB2103409B (en) 1986-04-23
DD201625A5 (en) 1983-07-27
ATA444881A (en) 1982-11-15

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