AT346096B - RECORD CARRIER AND DEVICE FOR DESCRIBING SUCH A - Google Patents

RECORD CARRIER AND DEVICE FOR DESCRIBING SUCH A

Info

Publication number
AT346096B
AT346096B AT538774A AT538774A AT346096B AT 346096 B AT346096 B AT 346096B AT 538774 A AT538774 A AT 538774A AT 538774 A AT538774 A AT 538774A AT 346096 B AT346096 B AT 346096B
Authority
AT
Austria
Prior art keywords
describing
record carrier
record
carrier
Prior art date
Application number
AT538774A
Other languages
German (de)
Other versions
ATA538774A (en
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 ATA538774A publication Critical patent/ATA538774A/en
Application granted granted Critical
Publication of AT346096B publication Critical patent/AT346096B/en

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
    • G11B7/24Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/2407Tracks or pits; Shape, structure or physical properties thereof
    • G11B7/24085Pits
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)
AT538774A 1973-07-02 1974-06-28 RECORD CARRIER AND DEVICE FOR DESCRIBING SUCH A AT346096B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NLAANVRAGE7309174,A NL172111C (en) 1973-07-02 1973-07-02 REGISTRATION CARRIER ON WHICH INFORMATION IS STORED IN AN OPTICAL STRUCTURE AND DEVICE FOR REGISTERING SUCH REGISTRATION CARRIER.

Publications (2)

Publication Number Publication Date
ATA538774A ATA538774A (en) 1978-02-15
AT346096B true AT346096B (en) 1978-10-25

Family

ID=19819188

Family Applications (1)

Application Number Title Priority Date Filing Date
AT538774A AT346096B (en) 1973-07-02 1974-06-28 RECORD CARRIER AND DEVICE FOR DESCRIBING SUCH A

Country Status (16)

Country Link
JP (1) JPS5623221B2 (en)
AT (1) AT346096B (en)
BE (1) BE817188A (en)
BR (1) BR7405448D0 (en)
CA (1) CA1039402A (en)
CH (1) CH592349A5 (en)
DE (1) DE2429850C2 (en)
DK (1) DK137735B (en)
ES (1) ES427804A1 (en)
FR (1) FR2236240B1 (en)
GB (1) GB1479294A (en)
IT (1) IT1014438B (en)
NL (1) NL172111C (en)
NO (1) NO144551C (en)
SE (1) SE402368B (en)
ZA (1) ZA744185B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7506495A (en) * 1975-06-02 1976-12-06 Philips Nv DEVICE FOR READING A REGISTRATION MEDIA.
JPS5242034U (en) * 1975-09-18 1977-03-25
NL7612070A (en) * 1975-10-31 1977-05-03 Hitachi Ltd DEVICE FOR READING INFORMATION.
US4097895A (en) * 1976-03-19 1978-06-27 Rca Corporation Multilayer optical record
JPS5363002A (en) * 1976-11-18 1978-06-06 Sony Corp Signal recording system and disk type medium for recording signal
JPS5369006A (en) * 1976-11-30 1978-06-20 Sony Corp Reproducer of disc form signal recording media
JPS54141604A (en) * 1978-04-27 1979-11-05 Nippon Columbia Optical disk and method of fabricating original disk of optical disk
CH636467A5 (en) * 1978-10-17 1983-05-31 Mca Disco Vision Method and device for recording a modulated electrical signal
NL7902363A (en) * 1979-03-27 1980-09-30 Philips Nv RECORD CARRIER WITH AN OPTICALLY READABLE INFORMASTRUCTURE.
JPH0335455Y2 (en) * 1986-01-10 1991-07-26

Also Published As

Publication number Publication date
DK137735C (en) 1978-10-02
JPS5034508A (en) 1975-04-02
JPS5623221B2 (en) 1981-05-29
FR2236240B1 (en) 1979-08-24
CA1039402A (en) 1978-09-26
SE7408535L (en) 1975-01-03
ATA538774A (en) 1978-02-15
NO742366L (en) 1975-01-27
FR2236240A1 (en) 1975-01-31
ZA744185B (en) 1976-02-25
CH592349A5 (en) 1977-10-31
BR7405448D0 (en) 1975-04-15
SE402368B (en) 1978-06-26
DE2429850A1 (en) 1975-01-30
DK137735B (en) 1978-04-24
NL172111C (en) 1983-07-01
AU7074274A (en) 1976-01-08
ES427804A1 (en) 1976-08-01
IT1014438B (en) 1977-04-20
DK351274A (en) 1975-02-24
NO144551C (en) 1981-09-16
NL7309174A (en) 1975-01-06
BE817188A (en) 1975-01-02
NO144551B (en) 1981-06-09
NL172111B (en) 1983-02-01
GB1479294A (en) 1977-07-13
DE2429850C2 (en) 1982-11-18

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Legal Events

Date Code Title Description
ELJ Ceased due to non-payment of the annual fee