GB1461605A - Method and device for producing a track guide in the recording of information in a spiral on a disc shaped signal carrier - Google Patents

Method and device for producing a track guide in the recording of information in a spiral on a disc shaped signal carrier

Info

Publication number
GB1461605A
GB1461605A GB1311474A GB1311474A GB1461605A GB 1461605 A GB1461605 A GB 1461605A GB 1311474 A GB1311474 A GB 1311474A GB 1311474 A GB1311474 A GB 1311474A GB 1461605 A GB1461605 A GB 1461605A
Authority
GB
United Kingdom
Prior art keywords
disc
information
mirrors
march
recording
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
GB1311474A
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.)
TED Bildplatten AG AEG Telefunken Teldec
Original Assignee
TED Bildplatten AG AEG Telefunken Teldec
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
Priority claimed from DE2315735A external-priority patent/DE2315735A1/en
Priority claimed from DE19742405071 external-priority patent/DE2405071A1/en
Priority claimed from DE19742405039 external-priority patent/DE2405039A1/en
Application filed by TED Bildplatten AG AEG Telefunken Teldec filed Critical TED Bildplatten AG AEG Telefunken Teldec
Publication of GB1461605A publication Critical patent/GB1461605A/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
    • G11B7/12—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
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Manufacturing Optical Record Carriers (AREA)

Abstract

1461605 Recording video signals TED BILDPLATTEN AG AEG TELEFUNKEN TELDEC 25 March 1974 [27 March 1973 2 Feb 1974 (2)] 13114/74 Heading G5R In a laser arrangement for recording video signals on a disc shaped record carrier, a photo lacquer layer on the disc is exposed simultaneously to an information signal and a signal which after subsequent etching of the disc provides a guidance groove for a play-back scanning element. Linearly polarized laser beam 31 is split by a polarization separator P31 into part beams 32, 33. Part beam 32 is transmitted via mirrors Sp31, Sp33 to modulator M which intensity modulates the beam with information signals to be recorded and the modulated output is passed via crossed cylindrical lenses L31, L32, which change the beam to one of elliptical crosssection, and mirrors Sp34, Sp32 to a second polarization separator P32. Part beam 33 which has a circular cross-section is also directed via mirrors Sp31, Sp35, Sp36 and Sp32 to the separator P32 where the beams are recombined, Fig. 3B, and focused via lenses L34, L35, mirror Sp37 and lens L36 on a photo lacquer layer in plane E33 of the disc P. As the disc rotates the head E32 moves along a radius of the disc to expose a spiral track having the form shown in Fig. 1a in which the continuous spine is produced by circular part beam 33 and the laterally extended rounded portions by the information modulated elliptical beam 32.
GB1311474A 1973-03-27 1974-03-25 Method and device for producing a track guide in the recording of information in a spiral on a disc shaped signal carrier Expired GB1461605A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE2315735A DE2315735A1 (en) 1973-03-27 1973-03-27 METHOD AND DEVICES FOR PRODUCING A TRACK GUIDANCE FOR THE RECORDING OF INFORMATION IN A SPIRAL ON A PLATE-SHAPED SIGNAL CARRIER
DE19742405071 DE2405071A1 (en) 1974-02-02 1974-02-02 Recording information on photosensitive discs - using laser beam to produce a track and modulated laser beam to record
DE19742405039 DE2405039A1 (en) 1974-02-02 1974-02-02 Recording information on photosensitive discs - using laser beam to produce a track and modulated laser beam to record

Publications (1)

Publication Number Publication Date
GB1461605A true GB1461605A (en) 1977-01-13

Family

ID=27185161

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1311474A Expired GB1461605A (en) 1973-03-27 1974-03-25 Method and device for producing a track guide in the recording of information in a spiral on a disc shaped signal carrier

Country Status (5)

Country Link
JP (1) JPS5027502A (en)
DD (1) DD113649A5 (en)
FR (1) FR2223778A1 (en)
GB (1) GB1461605A (en)
IT (1) IT1004391B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007038104A2 (en) * 2005-09-21 2007-04-05 Quantronix Corporation Laser cutting and sawing method and apparatus

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2321164A1 (en) * 1975-08-13 1977-03-11 Thomson Csf Video signal recording system - reads out signals from constant pitch spiral disc track using beam mechanically controlled by guide track
JPS5569500A (en) * 1978-11-17 1980-05-26 Pilot Ink Co Ltd Method of making writing implement clip with ornament
JPS5646721A (en) * 1979-09-21 1981-04-28 Seidensha Denshi Kogyo Kk Caulking device for plastic projection
JPS609743Y2 (en) * 1979-11-13 1985-04-05 セイコーエプソン株式会社 Locking structure of the glass part of a waterproof watch case
JPS5674381U (en) * 1979-11-13 1981-06-18
JPS5757619A (en) * 1980-09-25 1982-04-06 Matsushita Electric Ind Co Ltd Holding device of plastic forming parts of hot air blowing type
JPS57146117A (en) * 1981-03-05 1982-09-09 Aisin Seiki Co Ltd Attaching method for float stopper in liquid level detecting device
FR2521760A1 (en) * 1982-02-12 1983-08-19 Thomson Csf Thermo-optical recording process for video disc - uses two lasers of different wavelengths, only one being intensity modulated
JPS60132616U (en) * 1984-02-13 1985-09-04 パイオニア株式会社 recording device
JPH072955Y2 (en) * 1988-08-25 1995-01-30 文化シヤッター株式会社 Structure of the skylight
JPH042620U (en) * 1990-04-23 1992-01-10

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007038104A2 (en) * 2005-09-21 2007-04-05 Quantronix Corporation Laser cutting and sawing method and apparatus
WO2007038104A3 (en) * 2005-09-21 2007-07-05 Quantronix Corp Laser cutting and sawing method and apparatus

Also Published As

Publication number Publication date
FR2223778A1 (en) 1974-10-25
IT1004391B (en) 1976-07-10
JPS5027502A (en) 1975-03-20
DD113649A5 (en) 1975-06-12

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Legal Events

Date Code Title Description
CSNS Application of which complete specification have been accepted and published, but patent is not sealed