FR2690542B1 - DEVICE FOR READING INSCRIPTIONS ON A MEDIUM, APPLICATION TO THE READING OF COMPACT DISCS AND BARCODES. - Google Patents

DEVICE FOR READING INSCRIPTIONS ON A MEDIUM, APPLICATION TO THE READING OF COMPACT DISCS AND BARCODES.

Info

Publication number
FR2690542B1
FR2690542B1 FR9204945A FR9204945A FR2690542B1 FR 2690542 B1 FR2690542 B1 FR 2690542B1 FR 9204945 A FR9204945 A FR 9204945A FR 9204945 A FR9204945 A FR 9204945A FR 2690542 B1 FR2690542 B1 FR 2690542B1
Authority
FR
France
Prior art keywords
reading
inscriptions
barcodes
medium
application
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 - Lifetime
Application number
FR9204945A
Other languages
French (fr)
Other versions
FR2690542A1 (en
Inventor
Jean Landreau
Hisao Nakajima
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.)
Orange SA
Original Assignee
France Telecom SA
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 France Telecom SA filed Critical France Telecom SA
Priority to FR9204945A priority Critical patent/FR2690542B1/en
Publication of FR2690542A1 publication Critical patent/FR2690542A1/en
Application granted granted Critical
Publication of FR2690542B1 publication Critical patent/FR2690542B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G11B7/127—Lasers; Multiple laser arrays
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
    • G06K7/10821—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices
    • G06K7/10841—Particularities of the light-sensitive elements
    • 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
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/005—Reproducing
FR9204945A 1992-04-22 1992-04-22 DEVICE FOR READING INSCRIPTIONS ON A MEDIUM, APPLICATION TO THE READING OF COMPACT DISCS AND BARCODES. Expired - Lifetime FR2690542B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9204945A FR2690542B1 (en) 1992-04-22 1992-04-22 DEVICE FOR READING INSCRIPTIONS ON A MEDIUM, APPLICATION TO THE READING OF COMPACT DISCS AND BARCODES.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9204945A FR2690542B1 (en) 1992-04-22 1992-04-22 DEVICE FOR READING INSCRIPTIONS ON A MEDIUM, APPLICATION TO THE READING OF COMPACT DISCS AND BARCODES.

Publications (2)

Publication Number Publication Date
FR2690542A1 FR2690542A1 (en) 1993-10-29
FR2690542B1 true FR2690542B1 (en) 1997-11-14

Family

ID=9429135

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9204945A Expired - Lifetime FR2690542B1 (en) 1992-04-22 1992-04-22 DEVICE FOR READING INSCRIPTIONS ON A MEDIUM, APPLICATION TO THE READING OF COMPACT DISCS AND BARCODES.

Country Status (1)

Country Link
FR (1) FR2690542B1 (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6128267A (en) * 1996-04-01 2000-10-03 International Business Machines Corporation Active tracking method for optical disk storage
US5684782A (en) * 1996-04-01 1997-11-04 International Business Machines Corporation Use of a laser light source as a detector via a dithering modulation
US5872723A (en) * 1998-02-13 1999-02-16 International Business Machines Corporation In a system for creating, reading and writing on rotatable information storage media an apparatus for determining drive mechanism aging characteristics
US5892739A (en) * 1998-02-13 1999-04-06 International Business Machines Corporation In system for creating reading and writing on rotatable information storage media, an apparatus for multilayer source positioning using the laser source as a detector
US6081487A (en) * 1998-02-13 2000-06-27 International Business Machines Corporation System for creating, reading and writing on rotatable information storage media, an apparatus for controlling laser positioning
US6097681A (en) * 1998-02-13 2000-08-01 International Business Machines Corporation System for creating, reading and writing on rotatable information storage media, an apparatus for determining angular position, θ
US6128262A (en) * 1998-02-13 2000-10-03 International Business Machines Corporation System for creating, reading and writing on rotatable information storage media, a method for customizing said media with timing information
US6111830A (en) * 1998-02-13 2000-08-29 International Business Machines Corporation System for creating, reading and writing on rotatable information storage media, an apparatus for determining linear and/or angular velocity
US6088309A (en) * 1998-02-13 2000-07-11 International Business Machines Corporation System for creating, reading and writing on rotatable information storage media, a method for controlling vertical laser alignment
US6222813B1 (en) 1998-02-13 2001-04-24 International Business Machines Corporation System for creating, reading and writing on rotatable information storage media, an apparatus for controlling vertical laser alignment
US6108282A (en) * 1998-02-13 2000-08-22 International Business Machines Corporation System for creating, reading and writing on rotatable information storage media, an apparatus for multilayer laser source positioning
US6232045B1 (en) 1998-02-13 2001-05-15 International Business Machines Corporation System for creating, reading and writing on rotatable information storage media, a method for producing a recording blank
US6046970A (en) * 1998-02-13 2000-04-04 International Business Machines Corporation System for creating, reading and writing on rotatable storage media, an apparatus for determining laser aging characteristics
US6118740A (en) * 1998-02-13 2000-09-12 International Business Machines Corporation System for creating, reading and writing on rotatable information storage media, a method for writing closely spaced information tracks
US6097677A (en) * 1998-02-13 2000-08-01 International Business Machines Corporation System for creating, reading and writing on rotatable information storage media, a method for combined writing and reading operations
US6049512A (en) * 1998-02-13 2000-04-11 International Business Machines Corporation In a system for creating, reading and writing on rotatable information storage media, an apparatus for two-sided writing
US6088308A (en) * 1998-02-13 2000-07-11 International Business Machines Corporation System for creating, reading and writing on rotatable information storage media, a tracking circuit for providing positioning information
US6034929A (en) * 1998-02-13 2000-03-07 International Business Machines Corporation System for creating, reading and writing on rotatable information storage media, a method for multi-layer laser source positioning
US6088306A (en) * 1998-02-13 2000-07-11 International Business Machines Corporation System for creating, reading and writing on rotatable information storage media, an apparatus for combined writing and reading operations
US6081489A (en) * 1998-02-13 2000-06-27 International Business Machines Corporation System for creating, reading and writing on rotatable information storage media, an apparatus for performing both read and write operations

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4241423A (en) * 1978-12-22 1980-12-23 Rca Corporation Optical memory with injection laser as light source and detector
US4860276A (en) * 1986-09-18 1989-08-22 Nippon Telegraph And Telephone Corporation Micro optical head with an optically switched laser diode

Also Published As

Publication number Publication date
FR2690542A1 (en) 1993-10-29

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