ES427857A1 - Information carrier of disc form for sound and/or video signals - Google Patents

Information carrier of disc form for sound and/or video signals

Info

Publication number
ES427857A1
ES427857A1 ES427857A ES427857A ES427857A1 ES 427857 A1 ES427857 A1 ES 427857A1 ES 427857 A ES427857 A ES 427857A ES 427857 A ES427857 A ES 427857A ES 427857 A1 ES427857 A1 ES 427857A1
Authority
ES
Spain
Prior art keywords
information carrier
sound
reading
video signals
disc form
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
ES427857A
Other languages
Spanish (es)
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 ES427857A1 publication Critical patent/ES427857A1/en
Expired legal-status Critical Current

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)
  • Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
  • Testing Of Coins (AREA)

Abstract

An apparatus for reading a disc-shaped information carrier containing spirally arranged, optically encoded image and/or sound signals, the apparatus comprising a radiation source delivering a reading beam and a sensitive detection system to radiation to convert the reading beam modulated by the information carrier into an electrical signal, characterized by optical means in the path of the reading beam to selectively converge said beam on one of the individual information tracks. (Machine-translation by Google Translate, not legally binding)
ES427857A 1971-03-11 1974-07-01 Information carrier of disc form for sound and/or video signals Expired ES427857A1 (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
ES427857A1 true ES427857A1 (en) 1977-07-01

Family

ID=19812661

Family Applications (2)

Application Number Title Priority Date Filing Date
ES400596A Expired ES400596A1 (en) 1971-03-11 1972-03-09 Information carrier of disc form for sound and/or video signals
ES427857A Expired ES427857A1 (en) 1971-03-11 1974-07-01 Information carrier of disc form for sound and/or video signals

Family Applications Before (1)

Application Number Title Priority Date Filing Date
ES400596A Expired ES400596A1 (en) 1971-03-11 1972-03-09 Information carrier of disc form for sound and/or video signals

Country Status (13)

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

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 (en) * 1978-04-03 1979-10-05 Philips Nv RECORD CARRIER WITH AN OPTICALLY READABLE PHASE STRUCTURE AND DEVICE FOR READING.
FR2442487A2 (en) * 1978-11-21 1980-06-20 Thomson Brandt Automatic focussing for optical reading of video disc - using electromagnetic assembly with windings to control lens position
JPH0665950U (en) * 1991-07-22 1994-09-16 勉 宮崎 Optical reader
FR2750528A1 (en) * 1996-06-28 1998-01-02 Thomson Multimedia Sa OPTICAL DISC COMPATIBLE WITH TWO DIFFERENT READING SYSTEMS

Also Published As

Publication number Publication date
CH558053A (en) 1975-01-15
CA953419A (en) 1974-08-20
DK133449C (en) 1977-03-14
FR2129626A5 (en) 1972-10-27
ZA72928B (en) 1973-09-26
BE780451A (en) 1972-09-11
DK133449B (en) 1976-05-17
DE2209761A1 (en) 1972-09-21
DE2209761B2 (en) 1976-02-12
IT952934B (en) 1973-07-30
SE396493B (en) 1977-09-19
JPS5213733B1 (en) 1977-04-16
GB1387304A (en) 1975-03-12
NO138162B (en) 1978-04-03
NO138162C (en) 1978-07-12
NL7103233A (en) 1972-09-13
ES400596A1 (en) 1975-07-16

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