ES427804A1 - Optical recording - Google Patents

Optical recording

Info

Publication number
ES427804A1
ES427804A1 ES427804A ES427804A ES427804A1 ES 427804 A1 ES427804 A1 ES 427804A1 ES 427804 A ES427804 A ES 427804A ES 427804 A ES427804 A ES 427804A ES 427804 A1 ES427804 A1 ES 427804A1
Authority
ES
Spain
Prior art keywords
areas
tracks
existing
information
radiation
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
ES427804A
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 ES427804A1 publication Critical patent/ES427804A1/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
    • G11B7/24—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
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)

Abstract

An improved record-carrying device, in which the information is recorded in an optical structure of areas arranged according to tracks and intermediate areas, whose areas have an influence, on a radiation reading beam, different from the intermediate areas and the existing plateaus enters the tracks, defining the lengths of the individual areas and of the intermediate areas the information, for whose record carrier the average spatial frequency of the areas existing in the reading device varies, characterized in that the average dimensions of the areas existing in the tracks are matched to the average spatial frequency of the tracks such that, when the record carrier is read by means of a radiation reading beam that focuses on the information structure to give a radiation point greater than width of the track and, in the case of several tracks, less than the sum of the width of the track and twice the distance existing between consecutive tracks, a signal with sufficient modulation depth and minimal deformation is obtained. (Machine-translation by Google Translate, not legally binding)
ES427804A 1973-07-02 1974-06-28 Optical recording Expired ES427804A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NLAANVRAGE7309174,A NL172111C (en) 1973-07-02 1973-07-02 REGISTRATION CARRIER ON WHICH INFORMATION IS STORED IN AN OPTICAL STRUCTURE AND DEVICE FOR REGISTERING SUCH REGISTRATION CARRIER.

Publications (1)

Publication Number Publication Date
ES427804A1 true ES427804A1 (en) 1976-08-01

Family

ID=19819188

Family Applications (1)

Application Number Title Priority Date Filing Date
ES427804A Expired ES427804A1 (en) 1973-07-02 1974-06-28 Optical recording

Country Status (16)

Country Link
JP (1) JPS5623221B2 (en)
AT (1) AT346096B (en)
BE (1) BE817188A (en)
BR (1) BR7405448D0 (en)
CA (1) CA1039402A (en)
CH (1) CH592349A5 (en)
DE (1) DE2429850C2 (en)
DK (1) DK137735B (en)
ES (1) ES427804A1 (en)
FR (1) FR2236240B1 (en)
GB (1) GB1479294A (en)
IT (1) IT1014438B (en)
NL (1) NL172111C (en)
NO (1) NO144551C (en)
SE (1) SE402368B (en)
ZA (1) ZA744185B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7506495A (en) * 1975-06-02 1976-12-06 Philips Nv DEVICE FOR READING A REGISTRATION MEDIA.
JPS5242034U (en) * 1975-09-18 1977-03-25
FR2330108A1 (en) * 1975-10-31 1977-05-27 Hitachi Ltd INFORMATION RESTITUTION DEVICE
US4097895A (en) * 1976-03-19 1978-06-27 Rca Corporation Multilayer optical record
JPS5363002A (en) * 1976-11-18 1978-06-06 Sony Corp Signal recording system and disk type medium for recording signal
JPS5369006A (en) * 1976-11-30 1978-06-20 Sony Corp Reproducer of disc form signal recording media
JPS54141604A (en) * 1978-04-27 1979-11-05 Nippon Columbia Optical disk and method of fabricating original disk of optical disk
CH636212A5 (en) * 1978-10-17 1983-05-13 Mca Disco Vision Medium carrying recorded information
NL7902363A (en) * 1979-03-27 1980-09-30 Philips Nv RECORD CARRIER WITH AN OPTICALLY READABLE INFORMASTRUCTURE.
JPH0335455Y2 (en) * 1986-01-10 1991-07-26

Also Published As

Publication number Publication date
NL172111C (en) 1983-07-01
DK137735C (en) 1978-10-02
NO144551C (en) 1981-09-16
FR2236240A1 (en) 1975-01-31
IT1014438B (en) 1977-04-20
NL7309174A (en) 1975-01-06
AT346096B (en) 1978-10-25
ZA744185B (en) 1976-02-25
NL172111B (en) 1983-02-01
DE2429850C2 (en) 1982-11-18
CH592349A5 (en) 1977-10-31
DE2429850A1 (en) 1975-01-30
SE7408535L (en) 1975-01-03
CA1039402A (en) 1978-09-26
GB1479294A (en) 1977-07-13
JPS5623221B2 (en) 1981-05-29
AU7074274A (en) 1976-01-08
FR2236240B1 (en) 1979-08-24
JPS5034508A (en) 1975-04-02
SE402368B (en) 1978-06-26
BR7405448D0 (en) 1975-04-15
BE817188A (en) 1975-01-02
NO144551B (en) 1981-06-09
DK137735B (en) 1978-04-24
DK351274A (en) 1975-02-24
NO742366L (en) 1975-01-27
ATA538774A (en) 1978-02-15

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