FR2621160B1 - PROCESS FOR CONTINUOUSLY READING BOTH FACES OF A DISC WITHOUT PERCEPTIBLE INTERRUPTION BY THE USER AT THE END OF SIDE I, CONSTANT LINEAR SPEED AND / OR CONSTANT ANGULAR SPEED, AND DEVICE APPLYING SAID METHOD - Google Patents

PROCESS FOR CONTINUOUSLY READING BOTH FACES OF A DISC WITHOUT PERCEPTIBLE INTERRUPTION BY THE USER AT THE END OF SIDE I, CONSTANT LINEAR SPEED AND / OR CONSTANT ANGULAR SPEED, AND DEVICE APPLYING SAID METHOD

Info

Publication number
FR2621160B1
FR2621160B1 FR8713412A FR8713412A FR2621160B1 FR 2621160 B1 FR2621160 B1 FR 2621160B1 FR 8713412 A FR8713412 A FR 8713412A FR 8713412 A FR8713412 A FR 8713412A FR 2621160 B1 FR2621160 B1 FR 2621160B1
Authority
FR
France
Prior art keywords
disc
faces
constant
user
device applying
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
FR8713412A
Other languages
French (fr)
Other versions
FR2621160A1 (en
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.)
BERNARDO JEAN CLAUDE
Original Assignee
BERNARDO JEAN CLAUDE
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 BERNARDO JEAN CLAUDE filed Critical BERNARDO JEAN CLAUDE
Priority to FR8713412A priority Critical patent/FR2621160B1/en
Priority to PCT/FR1989/000126 priority patent/WO1990011600A1/en
Priority to EP89903757A priority patent/EP0415940A1/en
Publication of FR2621160A1 publication Critical patent/FR2621160A1/en
Application granted granted Critical
Publication of FR2621160B1 publication Critical patent/FR2621160B1/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
    • G11B7/002—Recording, reproducing or erasing systems characterised by the shape or form of the carrier
    • G11B7/0037—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with discs
    • 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
    • G11B7/08505—Methods for track change, selection or preliminary positioning by moving the head
    • 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
    • G11B7/13—Optical detectors 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
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
FR8713412A 1987-09-29 1987-09-29 PROCESS FOR CONTINUOUSLY READING BOTH FACES OF A DISC WITHOUT PERCEPTIBLE INTERRUPTION BY THE USER AT THE END OF SIDE I, CONSTANT LINEAR SPEED AND / OR CONSTANT ANGULAR SPEED, AND DEVICE APPLYING SAID METHOD Expired FR2621160B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR8713412A FR2621160B1 (en) 1987-09-29 1987-09-29 PROCESS FOR CONTINUOUSLY READING BOTH FACES OF A DISC WITHOUT PERCEPTIBLE INTERRUPTION BY THE USER AT THE END OF SIDE I, CONSTANT LINEAR SPEED AND / OR CONSTANT ANGULAR SPEED, AND DEVICE APPLYING SAID METHOD
PCT/FR1989/000126 WO1990011600A1 (en) 1987-09-29 1989-03-21 A process facilitating the continuous playing of both sides of a disc without any interruption which can be detected by the user at the end of side 1, constant linear and/or angular speed, and a device applying said process
EP89903757A EP0415940A1 (en) 1987-09-29 1989-03-21 A process facilitating the continuous playing of both sides of a disc without any interruption which can be detected by the user at the end of side 1, constant linear and/or angular speed, and a device applying said process

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8713412A FR2621160B1 (en) 1987-09-29 1987-09-29 PROCESS FOR CONTINUOUSLY READING BOTH FACES OF A DISC WITHOUT PERCEPTIBLE INTERRUPTION BY THE USER AT THE END OF SIDE I, CONSTANT LINEAR SPEED AND / OR CONSTANT ANGULAR SPEED, AND DEVICE APPLYING SAID METHOD
PCT/FR1989/000126 WO1990011600A1 (en) 1987-09-29 1989-03-21 A process facilitating the continuous playing of both sides of a disc without any interruption which can be detected by the user at the end of side 1, constant linear and/or angular speed, and a device applying said process

Publications (2)

Publication Number Publication Date
FR2621160A1 FR2621160A1 (en) 1989-03-31
FR2621160B1 true FR2621160B1 (en) 1989-12-08

Family

ID=26226233

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8713412A Expired FR2621160B1 (en) 1987-09-29 1987-09-29 PROCESS FOR CONTINUOUSLY READING BOTH FACES OF A DISC WITHOUT PERCEPTIBLE INTERRUPTION BY THE USER AT THE END OF SIDE I, CONSTANT LINEAR SPEED AND / OR CONSTANT ANGULAR SPEED, AND DEVICE APPLYING SAID METHOD

Country Status (3)

Country Link
EP (1) EP0415940A1 (en)
FR (1) FR2621160B1 (en)
WO (1) WO1990011600A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2621160B1 (en) * 1987-09-29 1989-12-08 Bernardo Jean Claude PROCESS FOR CONTINUOUSLY READING BOTH FACES OF A DISC WITHOUT PERCEPTIBLE INTERRUPTION BY THE USER AT THE END OF SIDE I, CONSTANT LINEAR SPEED AND / OR CONSTANT ANGULAR SPEED, AND DEVICE APPLYING SAID METHOD
US5255260A (en) * 1989-07-28 1993-10-19 Matsushita Electric Industrial Co., Ltd. Optical recording apparatus employing stacked recording media with spiral grooves and floating optical heads
FR2681173B1 (en) * 1991-09-05 1993-12-17 Bernardo Jean Claude PRECISION METHOD FOR APPARATUS USING OPTICAL MEDIA, ALLOWING CONTINUITY OF ACCESS TO SUCCESSIVE FACES OF A PROGRAM, AND DEVICES APPLYING SAID METHOD.
US5504731A (en) * 1992-03-06 1996-04-02 Quantum Corporation Remote fine positioning mechanism
NL9300774A (en) * 1992-05-13 1993-12-01 Gold Star Co OPTICAL RECORDING DEVICE.
DE19859069A1 (en) * 1998-12-22 2000-07-06 Thomson Brandt Gmbh Playback device for double-sided recording media

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4331966A (en) * 1980-10-06 1982-05-25 Storage Technology Corporation Information storage device and method of forming same
DE3584215D1 (en) * 1984-03-30 1991-10-31 Stefan De Fay PLAYER FOR MULTIPLE VERSATILE VIDEO DISKS.
US4635076A (en) * 1985-03-14 1987-01-06 Minnesota Mining And Manufacturing Company Two-sided optical recording medium
JPS61265734A (en) * 1985-05-20 1986-11-25 Matsushita Electric Ind Co Ltd Optical pickup device
JPS61265733A (en) * 1985-05-20 1986-11-25 Matsushita Electric Ind Co Ltd Optical pickup device
JPS62266745A (en) * 1986-05-15 1987-11-19 Sanyo Electric Co Ltd Optical pickup device
JPS63161542A (en) * 1986-12-25 1988-07-05 Sony Corp Disk player
JP2661025B2 (en) * 1987-01-08 1997-10-08 ソニー株式会社 Double-sided playback video disc player
FR2621160B1 (en) * 1987-09-29 1989-12-08 Bernardo Jean Claude PROCESS FOR CONTINUOUSLY READING BOTH FACES OF A DISC WITHOUT PERCEPTIBLE INTERRUPTION BY THE USER AT THE END OF SIDE I, CONSTANT LINEAR SPEED AND / OR CONSTANT ANGULAR SPEED, AND DEVICE APPLYING SAID METHOD

Also Published As

Publication number Publication date
FR2621160A1 (en) 1989-03-31
EP0415940A1 (en) 1991-03-13
WO1990011600A1 (en) 1990-10-04

Similar Documents

Publication Publication Date Title
FR2660543B1 (en) METHOD FOR AUTOMATICALLY MEASURING THE VOLUME OF A TUMOR, IN PARTICULAR A PROSTATE TUMOR, MEASURING DEVICE, METHOD AND APPARATUS COMPRISING THE SAME.
MA21541A1 (en) METHOD AND APPARATUS FOR CORRECTING AND POLISHING TIRES.
IT8921198A0 (en) BRAKE CONTROL DEVICE FOR USE ON BICYCLES.
DE69106424D1 (en) Rolling bearing, which is equipped with an adjustable information sensor.
DE59001450D1 (en) DRIVE DEVICE WITH VARIABLE TORQUE LIMITING SYSTEM.
FR2683008B1 (en) METHOD AND APPARATUS FOR MATTING FASTENERS.
FR2618793B1 (en) METHOD AND DEVICE FOR OBTAINING BIO-ACTIVE SUSPENSIONS
FR2571460B1 (en) CONTINUOUSLY ADJUSTABLE LENGTH ADJUSTING DEVICE
PT84529A (en) METHOD AND DEVICE FOR THE CONTROL OF SEALING ON PACKAGINGS
FR2621160B1 (en) PROCESS FOR CONTINUOUSLY READING BOTH FACES OF A DISC WITHOUT PERCEPTIBLE INTERRUPTION BY THE USER AT THE END OF SIDE I, CONSTANT LINEAR SPEED AND / OR CONSTANT ANGULAR SPEED, AND DEVICE APPLYING SAID METHOD
FR2674025B1 (en) METHOD OF PHYSICO-CHEMICAL ANALYSIS BASED ON THE CONTROL OF INTERFACIAL VOLTAGES, AND CORRESPONDING APPARATUS
FR2615616B1 (en) METHOD AND DEVICE FOR DETERMINING THE PASSAGE
FR2713611B1 (en) Roller drive device.
DE69202907D1 (en) Device for recording torque change.
FR2654513B1 (en) METHOD AND DEVICE FOR DETERMINING THE CHARACTERISTICS OF A LENS, AND IN PARTICULAR OF ITS POWER.
FR2687660B1 (en) METHOD AND DEVICE FOR DEMINERALIZING WATER.
FR2748500B1 (en) DEVICE AUTHORIZING THE CONTROL, AND THE VARIATION IN THE AMPLITUDE OF THE VIBRATIONS APPLIED TO THE ROTATING COMPACTOR ROLLERS
FR2456967B1 (en) FLOW ADJUSTMENT DEVICE IN PARTICULAR FOR A HYDRAULIC CONTROL APPARATUS AND THE APPARATUS THUS OBTAINED
BE838899A (en) PLATE EXERCISE DEVICE, IN PARTICULAR FOR LEARNING OR IMPROVING SKIING ON THE PISTE
FR2685007B1 (en) APPARATUS AND METHOD FOR REDUCING THE FORMATION OF SUGAR AGGLOMERATES IN A CENTRIFUGE.
FR2586585B1 (en) APPARATUS FOR CONTINUOUS ELUTION AND ABSORPTION.
FR2683043B1 (en) DEVICE AND METHOD FOR INTEGRAL AND CONTINUOUS MEASUREMENT OF GAS ADSORPTION AND DESORPTION.
FR2678376B1 (en) DEVICE FOR CONTINUOUSLY MEASURING THE BELT TENSION, AND METHOD USED BY SUCH A DEVICE.
FR2680698B1 (en) PROCESS FOR IMPROVING THE ELASTICITY OF THE SQUARE OF A SKI.
FR2711803B1 (en) Device for continuously monitoring the stability of a can.

Legal Events

Date Code Title Description
ST Notification of lapse