GB1302568A - - Google Patents

Info

Publication number
GB1302568A
GB1302568A GB1761870A GB1761870A GB1302568A GB 1302568 A GB1302568 A GB 1302568A GB 1761870 A GB1761870 A GB 1761870A GB 1761870 A GB1761870 A GB 1761870A GB 1302568 A GB1302568 A GB 1302568A
Authority
GB
United Kingdom
Prior art keywords
record
optical
playback
optical means
hill
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
GB1761870A
Other languages
English (en)
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
Priority claimed from DE1903822A external-priority patent/DE1903822C3/de
Application filed filed Critical
Publication of GB1302568A publication Critical patent/GB1302568A/en
Expired 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
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
  • Lenses (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)
GB1761870A 1969-01-23 1970-04-14 Expired GB1302568A (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1903822A DE1903822C3 (de) 1969-01-23 1969-01-23 Vorrichtung zur Wiedergabe auf einem Trager gespeicherter Signale, Aufzeichnungs verfahren für einen Trager sowie Trager zur Wiedergabe mit der Vorrichtung
DE19691927408 DE1927408C3 (de) 1969-01-23 1969-05-29 Vorrichtung zur Wiedergabe von gespeicherten Signalen

Publications (1)

Publication Number Publication Date
GB1302568A true GB1302568A (fr) 1973-01-10

Family

ID=25756903

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1761870A Expired GB1302568A (fr) 1969-01-23 1970-04-14

Country Status (5)

Country Link
AT (1) AT314853B (fr)
DE (1) DE1927408C3 (fr)
FR (1) FR2043779B2 (fr)
GB (1) GB1302568A (fr)
NL (1) NL7007594A (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4828216A (fr) * 1971-08-16 1973-04-14
JPS4829409A (fr) * 1971-08-19 1973-04-19
JPS4829413A (fr) * 1971-08-19 1973-04-19
JPS4831967A (fr) * 1971-08-27 1973-04-26
JPS4832543A (fr) * 1971-08-30 1973-04-28
JPS4833834A (fr) * 1971-09-01 1973-05-14
FR2197495A5 (fr) * 1972-08-25 1974-03-22 Thomson Csf
JPS4969102A (fr) * 1972-11-04 1974-07-04
FR2321164A1 (fr) * 1975-08-13 1977-03-11 Thomson Csf Procede mecano-optique de diffusion de l'information, disque et dispositifs d'enregistrement et de lecture pour la mise en oeuvre de ce procede

Also Published As

Publication number Publication date
FR2043779B2 (fr) 1976-02-20
DE1927408B2 (de) 1973-07-12
DE1927408A1 (de) 1971-03-11
NL7007594A (fr) 1970-12-01
FR2043779A2 (fr) 1971-02-19
DE1927408C3 (de) 1974-02-28
AT314853B (de) 1974-04-25

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Legal Events

Date Code Title Description
PS Patent sealed
PLE Entries relating assignments, transmissions, licences in the register of patents
PCNP Patent ceased through non-payment of renewal fee