FR2253248B1 - - Google Patents

Info

Publication number
FR2253248B1
FR2253248B1 FR7438988A FR7438988A FR2253248B1 FR 2253248 B1 FR2253248 B1 FR 2253248B1 FR 7438988 A FR7438988 A FR 7438988A FR 7438988 A FR7438988 A FR 7438988A FR 2253248 B1 FR2253248 B1 FR 2253248B1
Authority
FR
France
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
FR7438988A
Other versions
FR2253248A1 (fr
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
Publication of FR2253248A1 publication Critical patent/FR2253248A1/fr
Application granted granted Critical
Publication of FR2253248B1 publication Critical patent/FR2253248B1/fr
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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/122—Flying-type heads, e.g. analogous to Winchester type in magnetic recording

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)
  • Supporting Of Heads In Record-Carrier Devices (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)
FR7438988A 1973-11-29 1974-11-28 Expired FR2253248B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7316384A NL7316384A (nl) 1973-11-29 1973-11-29 Inrichting voor het optisch uitlezen van een reflekterende registratiedrager.

Publications (2)

Publication Number Publication Date
FR2253248A1 FR2253248A1 (fr) 1975-06-27
FR2253248B1 true FR2253248B1 (fr) 1980-03-21

Family

ID=19820101

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7438988A Expired FR2253248B1 (fr) 1973-11-29 1974-11-28

Country Status (20)

Country Link
US (1) US3950621A (fr)
JP (1) JPS5620614B2 (fr)
AR (1) AR201069A1 (fr)
AT (1) AT346095B (fr)
BE (1) BE822672A (fr)
BR (1) BR7409886A (fr)
CA (1) CA1033065A (fr)
CH (1) CH583447A5 (fr)
CS (1) CS190456B2 (fr)
DE (1) DE2453969C2 (fr)
DK (1) DK136921B (fr)
ES (1) ES432316A1 (fr)
FR (1) FR2253248B1 (fr)
GB (1) GB1490223A (fr)
IT (1) IT1024918B (fr)
NL (1) NL7316384A (fr)
NO (1) NO744237L (fr)
PL (1) PL105849B1 (fr)
SE (1) SE394336B (fr)
ZA (1) ZA747221B (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4067639A (en) * 1976-05-27 1978-01-10 Xerox Corporation Holographic scanning spinner
US4530082A (en) * 1982-06-28 1985-07-16 Eastman Kodak Company Optical disc write/read employing passive focus maintenance
JPS6229053Y2 (fr) * 1984-10-16 1987-07-25
GB2216710B (en) * 1988-03-14 1992-09-02 Ici Plc Optical or magneto-optical data system
US5012463A (en) * 1988-03-14 1991-04-30 Bernoulli Optical Systems Company Optical read/write storage system for flexible media having bernoulli stabilization at the optical head

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3155977A (en) * 1959-08-31 1964-11-03 Ibm Resilient recording disk
NL172202C (nl) * 1971-03-11 1983-07-18 Philips Nv Inrichting voor het uitlezen van een plaatvormige informatiedrager bevattende in optische vorm gecodeerde beeld- en/of geluidssignalen.
US3855426A (en) * 1971-03-11 1974-12-17 Philips Corp Video disc recording and optical playback system therefor
NL160138C (nl) * 1972-05-11 1979-09-17 Philips Nv Inrichting voor het uitlezen van een vlakke registratie- drager.

Also Published As

Publication number Publication date
FR2253248A1 (fr) 1975-06-27
DE2453969C2 (de) 1986-04-10
IT1024918B (it) 1978-07-20
CS190456B2 (en) 1979-05-31
CH583447A5 (fr) 1976-12-31
SE7414806L (fr) 1975-05-30
SE394336B (sv) 1977-06-20
CA1033065A (fr) 1978-06-13
US3950621A (en) 1976-04-13
DE2453969A1 (de) 1975-06-19
ES432316A1 (es) 1976-11-01
DK136921C (fr) 1978-05-22
ATA946074A (de) 1978-02-15
AR201069A1 (es) 1975-02-06
NL7316384A (nl) 1975-06-02
DK136921B (da) 1977-12-12
BR7409886A (pt) 1976-05-25
JPS5620614B2 (fr) 1981-05-14
NO744237L (fr) 1975-06-23
DK613474A (fr) 1975-07-28
PL105849B1 (pl) 1979-11-30
AU7580674A (en) 1976-05-27
ZA747221B (en) 1976-06-30
AT346095B (de) 1978-10-25
JPS5087606A (fr) 1975-07-14
BE822672A (nl) 1975-05-27
GB1490223A (en) 1977-10-26

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Legal Events

Date Code Title Description
ST Notification of lapse