FR2269170A1 - Electron beam wide-band signal recording system - is used to make master disc for gramophone records - Google Patents

Electron beam wide-band signal recording system - is used to make master disc for gramophone records

Info

Publication number
FR2269170A1
FR2269170A1 FR7512289A FR7512289A FR2269170A1 FR 2269170 A1 FR2269170 A1 FR 2269170A1 FR 7512289 A FR7512289 A FR 7512289A FR 7512289 A FR7512289 A FR 7512289A FR 2269170 A1 FR2269170 A1 FR 2269170A1
Authority
FR
France
Prior art keywords
electron beam
band signal
disc
recording system
signal 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.)
Withdrawn
Application number
FR7512289A
Other languages
French (fr)
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.)
Decca Ltd
Original Assignee
Decca Ltd
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 US05/463,252 external-priority patent/US3952146A/en
Application filed by Decca Ltd filed Critical Decca Ltd
Publication of FR2269170A1 publication Critical patent/FR2269170A1/en
Withdrawn legal-status Critical Current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
    • H04N5/80—Television signal recording using electrostatic recording
    • H04N5/82—Television signal recording using electrostatic recording using deformable thermoplastic recording medium
    • H04N5/83—Television signal recording using electrostatic recording using deformable thermoplastic recording medium on disks or drums
    • 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
    • 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
    • G11B11/03—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 using recording by deforming with non-mechanical means, e.g. laser, beam of particles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
    • H01J37/02—Details
    • H01J37/04—Arrangements of electrodes and associated parts for generating or controlling the discharge, e.g. electron-optical arrangement, ion-optical arrangement
    • H01J37/153—Electron-optical or ion-optical arrangements for the correction of image defects, e.g. stigmators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
    • H01J37/30—Electron-beam or ion-beam tubes for localised treatment of objects

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

The electron beam is directed onto a thin disc (11) made from an electrically resistant thermoplastics, supported by a conductive substrate (12). The disc is displaced so that the electron beam traces a helical path to deposit a continuous track of electrical charges on the disc (11), the intensity of the beam being modulated in accordance with the wide-band signal. The beam is focused to produce a spot whose effective diameter, in the sense of progression along the track, being less than the wavelength of the shortest signal. The beam is subjected to astigmatism to elongate the spot in the transverse direction, so that its diameter is a fraction of the track width.
FR7512289A 1974-04-23 1975-04-21 Electron beam wide-band signal recording system - is used to make master disc for gramophone records Withdrawn FR2269170A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/463,252 US3952146A (en) 1971-04-28 1974-04-23 Electron beam recording of wide-band signals on thermoplastic film

Publications (1)

Publication Number Publication Date
FR2269170A1 true FR2269170A1 (en) 1975-11-21

Family

ID=23839457

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7512289A Withdrawn FR2269170A1 (en) 1974-04-23 1975-04-21 Electron beam wide-band signal recording system - is used to make master disc for gramophone records

Country Status (11)

Country Link
JP (1) JPS50147320A (en)
AU (1) AU8028375A (en)
BE (1) BE828238A (en)
CH (1) CH604312A5 (en)
DE (1) DE2517782A1 (en)
DK (1) DK173075A (en)
FR (1) FR2269170A1 (en)
IT (1) IT1032734B (en)
NL (1) NL7504749A (en)
NO (1) NO751400L (en)
SE (1) SE7504639L (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2349910A1 (en) * 1976-04-08 1977-11-25 Sony Corp DISC FOR RECORDING VIDEO SIGNALS IN PARTICULAR AND ITS MANUFACTURING PROCESS

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2647732B2 (en) * 1990-06-27 1997-08-27 株式会社日立製作所 Electron beam size measurement device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2349910A1 (en) * 1976-04-08 1977-11-25 Sony Corp DISC FOR RECORDING VIDEO SIGNALS IN PARTICULAR AND ITS MANUFACTURING PROCESS

Also Published As

Publication number Publication date
AU8028375A (en) 1976-10-21
DK173075A (en) 1975-10-24
IT1032734B (en) 1979-06-20
JPS50147320A (en) 1975-11-26
SE7504639L (en) 1975-10-24
NO751400L (en) 1975-10-24
DE2517782A1 (en) 1975-11-06
NL7504749A (en) 1975-10-27
BE828238A (en) 1975-08-18
CH604312A5 (en) 1978-09-15

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Legal Events

Date Code Title Description
ST Notification of lapse