ZA744185B - Record carrier on which information is recorded in an optical structure - Google Patents

Record carrier on which information is recorded in an optical structure

Info

Publication number
ZA744185B
ZA744185B ZA00744185A ZA744185A ZA744185B ZA 744185 B ZA744185 B ZA 744185B ZA 00744185 A ZA00744185 A ZA 00744185A ZA 744185 A ZA744185 A ZA 744185A ZA 744185 B ZA744185 B ZA 744185B
Authority
ZA
South Africa
Prior art keywords
recorded
information
record carrier
optical structure
optical
Prior art date
Application number
ZA00744185A
Other languages
English (en)
Inventor
J Braat
B Jacobs
G Bouwhuis
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 ZA744185B publication Critical patent/ZA744185B/xx

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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/125—Optical 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)
ZA00744185A 1973-07-02 1974-06-28 Record carrier on which information is recorded in an optical structure ZA744185B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NLAANVRAGE7309174,A NL172111C (nl) 1973-07-02 1973-07-02 Registratiedrager waarop informatie is vastgelegd in een optische struktuur en inrichting voor het inschrijven van een dergelijke registratiedrager.

Publications (1)

Publication Number Publication Date
ZA744185B true ZA744185B (en) 1976-02-25

Family

ID=19819188

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA00744185A ZA744185B (en) 1973-07-02 1974-06-28 Record carrier on which information is recorded in an optical structure

Country Status (16)

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

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7506495A (nl) * 1975-06-02 1976-12-06 Philips Nv Inrichting voor het uitlezen van een registratie- drager.
JPS5242034U (da) * 1975-09-18 1977-03-25
FR2330108A1 (fr) * 1975-10-31 1977-05-27 Hitachi Ltd Appareil de restitution d'informations
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 (nl) * 1979-03-27 1980-09-30 Philips Nv Registratiedrager met een optisch uitleesbare informa- tiestruktuur.
JPH0335455Y2 (da) * 1986-01-10 1991-07-26

Also Published As

Publication number Publication date
NL172111B (nl) 1983-02-01
DK351274A (da) 1975-02-24
DE2429850A1 (de) 1975-01-30
JPS5034508A (da) 1975-04-02
FR2236240B1 (da) 1979-08-24
GB1479294A (en) 1977-07-13
DK137735B (da) 1978-04-24
ATA538774A (de) 1978-02-15
BE817188A (fr) 1975-01-02
BR7405448D0 (pt) 1975-04-15
ES427804A1 (es) 1976-08-01
DK137735C (da) 1978-10-02
NO144551C (no) 1981-09-16
FR2236240A1 (da) 1975-01-31
IT1014438B (it) 1977-04-20
DE2429850C2 (de) 1982-11-18
NO742366L (da) 1975-01-27
CH592349A5 (da) 1977-10-31
AU7074274A (en) 1976-01-08
SE7408535L (da) 1975-01-03
CA1039402A (en) 1978-09-26
SE402368B (sv) 1978-06-26
AT346096B (de) 1978-10-25
NL7309174A (nl) 1975-01-06
NO144551B (no) 1981-06-09
NL172111C (nl) 1983-07-01
JPS5623221B2 (da) 1981-05-29

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