ES540695A0 - Una unidad de lectura optica. - Google Patents

Una unidad de lectura optica.

Info

Publication number
ES540695A0
ES540695A0 ES540695A ES540695A ES540695A0 ES 540695 A0 ES540695 A0 ES 540695A0 ES 540695 A ES540695 A ES 540695A ES 540695 A ES540695 A ES 540695A ES 540695 A0 ES540695 A0 ES 540695A0
Authority
ES
Spain
Prior art keywords
reading unit
optical reading
optical
unit
reading
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.)
Granted
Application number
ES540695A
Other languages
English (en)
Other versions
ES8700806A1 (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 ES540695A0 publication Critical patent/ES540695A0/es
Publication of ES8700806A1 publication Critical patent/ES8700806A1/es
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/09—Processes or apparatus for excitation, e.g. pumping
    • H01S3/0955—Processes or apparatus for excitation, e.g. pumping using pumping by high energy particles
    • H01S3/0959—Processes or apparatus for excitation, e.g. pumping using pumping by high energy particles by an electron beam
    • 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
    • G06K7/14—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation using light without selection of wavelength, e.g. sensing reflected white light
    • 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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/30—Cold cathodes, e.g. field-emissive cathode
    • H01J1/308—Semiconductor cathodes, e.g. cathodes with PN junction layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
    • H01S5/062—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying the potential of the electrodes
    • H01S5/06233—Controlling other output parameters than intensity or frequency
    • H01S5/06243—Controlling other output parameters than intensity or frequency controlling the position or direction of the emitted beam

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Artificial Intelligence (AREA)
  • Toxicology (AREA)
  • General Health & Medical Sciences (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Plasma & Fusion (AREA)
  • Health & Medical Sciences (AREA)
  • Optical Head (AREA)
  • Semiconductor Lasers (AREA)
ES540695A 1984-02-29 1985-02-26 Una unidad de lectura optica. Expired ES8700806A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL8400632A NL8400632A (nl) 1984-02-29 1984-02-29 Inrichting voor het opwekken van elektromagnetische straling.

Publications (2)

Publication Number Publication Date
ES540695A0 true ES540695A0 (es) 1986-10-16
ES8700806A1 ES8700806A1 (es) 1986-10-16

Family

ID=19843561

Family Applications (1)

Application Number Title Priority Date Filing Date
ES540695A Expired ES8700806A1 (es) 1984-02-29 1985-02-26 Una unidad de lectura optica.

Country Status (5)

Country Link
EP (1) EP0156412A1 (es)
JP (1) JPS60217691A (es)
AU (1) AU3927085A (es)
ES (1) ES8700806A1 (es)
NL (1) NL8400632A (es)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0184250B1 (en) * 1984-12-04 1992-09-02 Koninklijke Philips Electronics N.V. Electron-beam-pumped semiconductor laser and array
JP2548352B2 (ja) * 1989-01-17 1996-10-30 松下電器産業株式会社 発光素子およびその製造方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3655986A (en) * 1964-10-20 1972-04-11 Massachusetts Inst Technology Laser device
US3715162A (en) * 1971-04-19 1973-02-06 Minnesota Mining & Mfg Free exciton indirect transition laser
NL7608561A (nl) * 1976-08-02 1978-02-06 Philips Nv Optische uitleeseenheid voor het aftasten van een registratiedrager voorzien van een stra- lingsreflekterende informatiestruktuur.
NL184589C (nl) * 1979-07-13 1989-09-01 Philips Nv Halfgeleiderinrichting voor het opwekken van een elektronenbundel en werkwijze voor het vervaardigen van een dergelijke halfgeleiderinrichting.
NL8300631A (nl) * 1983-02-21 1984-09-17 Philips Nv Inrichting voor het opwekken van coherente straling.

Also Published As

Publication number Publication date
NL8400632A (nl) 1985-09-16
AU3927085A (en) 1985-09-05
ES8700806A1 (es) 1986-10-16
EP0156412A1 (en) 1985-10-02
JPS60217691A (ja) 1985-10-31

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