BE780451A - Porte-information sous forme de disque, contenant des signaux video et/ou des signaux sonores ranges en spirale et codes par voie optique - Google Patents

Porte-information sous forme de disque, contenant des signaux video et/ou des signaux sonores ranges en spirale et codes par voie optique

Info

Publication number
BE780451A
BE780451A BE780451A BE780451A BE780451A BE 780451 A BE780451 A BE 780451A BE 780451 A BE780451 A BE 780451A BE 780451 A BE780451 A BE 780451A BE 780451 A BE780451 A BE 780451A
Authority
BE
Belgium
Prior art keywords
spiral
information carrier
ranged
containing video
disc form
Prior art date
Application number
BE780451A
Other languages
English (en)
French (fr)
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 BE780451A publication Critical patent/BE780451A/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/7605—Television signal recording on discs or drums
    • 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
    • G11B7/005—Reproducing
    • 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
    • G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
    • 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
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1365—Separate or integrated refractive elements, e.g. wave plates
    • 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
    • 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
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1372—Lenses
    • G11B2007/13727—Compound lenses, i.e. two or more lenses co-operating to perform a function, e.g. compound objective lens including a solid immersion lens, positive and negative lenses either bonded together or with adjustable spacing

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Testing Of Coins (AREA)
  • Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
BE780451A 1971-03-11 1972-03-09 Porte-information sous forme de disque, contenant des signaux video et/ou des signaux sonores ranges en spirale et codes par voie optique BE780451A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7103233A NL7103233A (zh) 1971-03-11 1971-03-11

Publications (1)

Publication Number Publication Date
BE780451A true BE780451A (fr) 1972-09-11

Family

ID=19812661

Family Applications (1)

Application Number Title Priority Date Filing Date
BE780451A BE780451A (fr) 1971-03-11 1972-03-09 Porte-information sous forme de disque, contenant des signaux video et/ou des signaux sonores ranges en spirale et codes par voie optique

Country Status (13)

Country Link
JP (1) JPS5213733B1 (zh)
BE (1) BE780451A (zh)
CA (1) CA953419A (zh)
CH (1) CH558053A (zh)
DK (1) DK133449B (zh)
ES (2) ES400596A1 (zh)
FR (1) FR2129626A5 (zh)
GB (1) GB1387304A (zh)
IT (1) IT952934B (zh)
NL (1) NL7103233A (zh)
NO (1) NO138162C (zh)
SE (1) SE396493B (zh)
ZA (1) ZA72928B (zh)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4161752A (en) * 1977-06-28 1979-07-17 International Business Machines Corporation High density video disk having two pit depths
NL7803517A (nl) * 1978-04-03 1979-10-05 Philips Nv Registratiedrager met een optisch uitleesbare fase- struktuur en inrichting voor het uitlezen.
FR2442487A2 (fr) * 1978-11-21 1980-06-20 Thomson Brandt Dispositif de recherche de focalisation et lecteur optique comportant un tel dispositif
JPH0665950U (ja) * 1991-07-22 1994-09-16 勉 宮崎 光学読取装置
FR2750528A1 (fr) * 1996-06-28 1998-01-02 Thomson Multimedia Sa Disque optique compatible a deux systemes de lecture differents

Also Published As

Publication number Publication date
NO138162B (no) 1978-04-03
ES400596A1 (es) 1975-07-16
DE2209761A1 (de) 1972-09-21
DE2209761B2 (de) 1976-02-12
GB1387304A (en) 1975-03-12
ZA72928B (en) 1973-09-26
FR2129626A5 (zh) 1972-10-27
CH558053A (de) 1975-01-15
DK133449B (da) 1976-05-17
JPS5213733B1 (zh) 1977-04-16
CA953419A (en) 1974-08-20
IT952934B (it) 1973-07-30
SE396493B (sv) 1977-09-19
NL7103233A (zh) 1972-09-13
ES427857A1 (es) 1977-07-01
NO138162C (no) 1978-07-12
DK133449C (zh) 1977-03-14

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: N.V. PHILIPS GLOEILAMPENFABRIEKEN

Effective date: 19910331