SE396493B - Skivformad informationsberare - Google Patents

Skivformad informationsberare

Info

Publication number
SE396493B
SE396493B SE7202924A SE292472A SE396493B SE 396493 B SE396493 B SE 396493B SE 7202924 A SE7202924 A SE 7202924A SE 292472 A SE292472 A SE 292472A SE 396493 B SE396493 B SE 396493B
Authority
SE
Sweden
Prior art keywords
information carrier
disc shaped
shaped information
disc
carrier
Prior art date
Application number
SE7202924A
Other languages
English (en)
Swedish (sv)
Inventor
G Bouwhuis
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 SE396493B publication Critical patent/SE396493B/xx

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/76Television signal recording
    • H04N5/7605Television signal recording on discs or drums
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/004Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/005Reproducing
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/08Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/085Disposition 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
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/12Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1365Separate or integrated refractive elements, e.g. wave plates
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/24Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/24Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/2407Tracks or pits; Shape, structure or physical properties thereof
    • G11B7/24085Pits
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/12Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1372Lenses
    • G11B2007/13727Compound 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)
SE7202924A 1971-03-11 1972-03-08 Skivformad informationsberare SE396493B (sv)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
SE396493B true SE396493B (sv) 1977-09-19

Family

ID=19812661

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7202924A SE396493B (sv) 1971-03-11 1972-03-08 Skivformad informationsberare

Country Status (13)

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

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 (da) 1972-10-27
CH558053A (de) 1975-01-15
BE780451A (fr) 1972-09-11
DK133449B (da) 1976-05-17
JPS5213733B1 (da) 1977-04-16
CA953419A (en) 1974-08-20
IT952934B (it) 1973-07-30
NL7103233A (da) 1972-09-13
ES427857A1 (es) 1977-07-01
NO138162C (no) 1978-07-12
DK133449C (da) 1977-03-14

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