GB1482544A - Reading optical-recordings - Google Patents

Reading optical-recordings

Info

Publication number
GB1482544A
GB1482544A GB4169574A GB4169574A GB1482544A GB 1482544 A GB1482544 A GB 1482544A GB 4169574 A GB4169574 A GB 4169574A GB 4169574 A GB4169574 A GB 4169574A GB 1482544 A GB1482544 A GB 1482544A
Authority
GB
United Kingdom
Prior art keywords
recordings
sept
reading optical
reflecting element
optical playback
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
GB4169574A
Other languages
English (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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries Ltd
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 Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1482544A publication Critical patent/GB1482544A/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
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0925—Electromechanical actuators for lens positioning
    • 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
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers

Landscapes

  • Optical Recording Or Reproduction (AREA)
GB4169574A 1973-09-28 1974-09-25 Reading optical-recordings Expired GB1482544A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7313362A NL7313362A (nl) 1973-09-28 1973-09-28 Inrichting voor het uitlezen van een vlakke regis- edrager met in optische vorm opgeslagen matie.

Publications (1)

Publication Number Publication Date
GB1482544A true GB1482544A (en) 1977-08-10

Family

ID=19819695

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4169574A Expired GB1482544A (en) 1973-09-28 1974-09-25 Reading optical-recordings

Country Status (4)

Country Link
DE (1) DE2445238A1 (enrdf_load_stackoverflow)
FR (1) FR2247041B3 (enrdf_load_stackoverflow)
GB (1) GB1482544A (enrdf_load_stackoverflow)
NL (1) NL7313362A (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2052829B (en) * 1979-04-27 1983-01-12 Olympus Optical Co Apparatus for driving objective lens in tracking direction
NL8001617A (nl) * 1980-03-19 1981-10-16 Philips Nv Inrichting voor het elektrodynamisch bestuurbaar zwenken van een optisch element.

Also Published As

Publication number Publication date
FR2247041B3 (enrdf_load_stackoverflow) 1977-07-08
FR2247041A1 (enrdf_load_stackoverflow) 1975-05-02
NL7313362A (nl) 1975-04-02
DE2445238A1 (de) 1975-04-03

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee