AU470672B2 - Carrier provided with a spiral structure in which sound and/or image information is stored - Google Patents

Carrier provided with a spiral structure in which sound and/or image information is stored

Info

Publication number
AU470672B2
AU470672B2 AU39454/72A AU3945472A AU470672B2 AU 470672 B2 AU470672 B2 AU 470672B2 AU 39454/72 A AU39454/72 A AU 39454/72A AU 3945472 A AU3945472 A AU 3945472A AU 470672 B2 AU470672 B2 AU 470672B2
Authority
AU
Australia
Prior art keywords
sound
stored
image information
spiral structure
carrier provided
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
AU39454/72A
Other versions
AU3945472A (en
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken 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 Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Application granted granted Critical
Publication of AU3945472A publication Critical patent/AU3945472A/en
Publication of AU470672B2 publication Critical patent/AU470672B2/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/004Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/005Reproducing
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/007Arrangement 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
    • G11B7/013Arrangement 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 for discrete information, i.e. where each information unit is stored in a distinct discrete location, e.g. digital information formats within a data block or sector
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/12Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/125Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/12Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135Means for guiding the beam from the source to the record carrier or from the record carrier to the detector

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)
AU39454/72A 1971-03-04 1972-02-29 Carrier provided with a spiral structure in which sound and/or image information is stored Expired AU470672B2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7102863A NL7102863A (en) 1971-03-04 1971-03-04

Publications (2)

Publication Number Publication Date
AU3945472A AU3945472A (en) 1973-08-30
AU470672B2 true AU470672B2 (en) 1973-08-30

Family

ID=19812612

Family Applications (1)

Application Number Title Priority Date Filing Date
AU39454/72A Expired AU470672B2 (en) 1971-03-04 1972-02-29 Carrier provided with a spiral structure in which sound and/or image information is stored

Country Status (15)

Country Link
JP (2) JPS544603B1 (en)
AR (2) AR195275A1 (en)
AT (1) AT342122B (en)
AU (1) AU470672B2 (en)
BE (1) BE780146A (en)
BR (1) BR7201206D0 (en)
CA (1) CA1023855A (en)
CH (2) CH552920A (en)
ES (1) ES400336A1 (en)
FR (1) FR2128576B1 (en)
GB (1) GB1391541A (en)
IT (1) IT952884B (en)
NL (1) NL7102863A (en)
NO (1) NO139905C (en)
ZA (1) ZA721137B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2197495A5 (en) * 1972-08-25 1974-03-22 Thomson Csf
NL7212015A (en) * 1972-09-04 1974-03-06
FR2235354A1 (en) * 1973-06-29 1975-01-24 Thomson Csf Photoelectric optical test sensor - measures displacement of a diffraction screen with constant spacing in the test sensor plane
NL7611567A (en) * 1976-10-20 1978-04-24 Philips Nv METHOD OF MAKING COPIES OF TRACKS OF INFORMATION ON CARRIERS.
BE871326A (en) * 1978-10-23 1979-04-17 Mca Disco Vision METHOD AND DEVICE FOR RECORDING AND REPRODUCING A VIDEO SIGNAL.

Also Published As

Publication number Publication date
NO139905B (en) 1979-02-19
JPS5452504A (en) 1979-04-25
NL7102863A (en) 1972-09-06
AR203718A1 (en) 1975-10-15
CH553522A (en) 1974-08-30
DE2208379A1 (en) 1972-09-14
FR2128576A1 (en) 1972-10-20
CH552920A (en) 1974-08-15
NO139905C (en) 1979-05-30
BE780146A (en) 1972-09-04
ATA166672A (en) 1977-07-15
FR2128576B1 (en) 1980-03-14
JPS544603B1 (en) 1979-03-08
AT342122B (en) 1978-03-10
DE2208379B2 (en) 1976-10-28
ES400336A1 (en) 1975-06-16
GB1391541A (en) 1975-04-23
BR7201206D0 (en) 1973-06-07
IT952884B (en) 1973-07-30
JPS5732409B2 (en) 1982-07-10
AR195275A1 (en) 1973-09-28
AU3945472A (en) 1973-08-30
ZA721137B (en) 1973-10-31
CA1023855A (en) 1978-01-03

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