ZA773820B - Optical read unit for scanning a record carrier having a radiation-reflecting information structure - Google Patents

Optical read unit for scanning a record carrier having a radiation-reflecting information structure

Info

Publication number
ZA773820B
ZA773820B ZA00773820A ZA773820A ZA773820B ZA 773820 B ZA773820 B ZA 773820B ZA 00773820 A ZA00773820 A ZA 00773820A ZA 773820 A ZA773820 A ZA 773820A ZA 773820 B ZA773820 B ZA 773820B
Authority
ZA
South Africa
Prior art keywords
scanning
radiation
record carrier
information structure
read unit
Prior art date
Application number
ZA00773820A
Other languages
English (en)
Inventor
K Immink
C Simons
J Heemskerk
Original Assignee
Philips 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 Nv filed Critical Philips Nv
Publication of ZA773820B publication Critical patent/ZA773820B/xx

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
    • H01S5/00—Semiconductor lasers
    • H01S5/005—Optical components external to the laser cavity, specially adapted therefor, e.g. for homogenisation or merging of the beams or for manipulating laser pulses, e.g. pulse shaping
    • 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
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • 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
    • 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)
  • Optics & Photonics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optical Head (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Manufacturing Optical Record Carriers (AREA)
ZA00773820A 1976-08-02 1977-06-24 Optical read unit for scanning a record carrier having a radiation-reflecting information structure ZA773820B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7608561A NL7608561A (nl) 1976-08-02 1976-08-02 Optische uitleeseenheid voor het aftasten van een registratiedrager voorzien van een stra- lingsreflekterende informatiestruktuur.

Publications (1)

Publication Number Publication Date
ZA773820B true ZA773820B (en) 1979-01-31

Family

ID=19826682

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA00773820A ZA773820B (en) 1976-08-02 1977-06-24 Optical read unit for scanning a record carrier having a radiation-reflecting information structure

Country Status (22)

Country Link
US (1) US4365323A (nl)
JP (4) JPS5317706A (nl)
AR (1) AR216770A1 (nl)
AT (1) AT369937B (nl)
AU (1) AU514749B2 (nl)
BE (1) BE857364A (nl)
BR (1) BR7705041A (nl)
CA (1) CA1109559A (nl)
CH (1) CH623147A5 (nl)
DE (3) DE2760057C2 (nl)
DK (1) DK341777A (nl)
ES (1) ES461197A1 (nl)
FR (1) FR2360957A1 (nl)
GB (1) GB1584664A (nl)
IT (1) IT1085620B (nl)
MX (1) MX143157A (nl)
NL (1) NL7608561A (nl)
NO (1) NO772674L (nl)
NZ (1) NZ184779A (nl)
PL (1) PL116457B1 (nl)
SE (3) SE437737B (nl)
ZA (1) ZA773820B (nl)

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JPS54133305A (en) * 1978-04-07 1979-10-17 Hitachi Ltd Information recorder
JPS54146613A (en) * 1978-05-10 1979-11-16 Hitachi Ltd Optical head
JPS54160212A (en) * 1978-06-09 1979-12-18 Hitachi Ltd Optical head for information processing
JPS5542369A (en) * 1978-09-19 1980-03-25 Mitsubishi Electric Corp Pickup controller
JPS55150141A (en) * 1979-05-14 1980-11-21 Hitachi Ltd Detecting method for control information
US4333173A (en) * 1979-06-15 1982-06-01 Hitachi, Ltd. Optical information processor with prismatic correction of laser beam shape
JPS56117339A (en) * 1980-02-18 1981-09-14 Hitachi Ltd Optical information processor
NL7904724A (nl) * 1979-06-18 1980-12-22 Philips Nv Optische aftastinrichting met fokusseerstelsel.
NL8004159A (nl) * 1979-08-03 1981-01-22 Hitachi Ltd Optische opneeminrichting.
FR2474740A1 (fr) * 1980-01-24 1981-07-31 Thomson Csf Equipage mobile d'un lecteur enregistreur de videodisque, et lecteur enregistreur de videodisque comprenant un tel equipage
JPS56127938A (en) * 1980-03-07 1981-10-07 Seiko Instr & Electronics Ltd Optical reproducer
NL182031C (nl) * 1980-11-06 1987-12-16 Philips Nv Optisch stelsel dat een gekollimeerde lichtbundel levert.
JPS57111838A (en) * 1980-12-27 1982-07-12 Olympus Optical Co Ltd Optical information reader
JPS5873023A (ja) * 1981-10-27 1983-05-02 Pioneer Electronic Corp 情報読取装置におけるトラツキングサ−ボ信号発生装置
JPS5880139A (ja) * 1981-11-04 1983-05-14 Sony Corp 光学ヘツド
FR2521377A1 (fr) * 1982-01-28 1983-08-12 Ricoh Kk Appareil d'enregistrement et de lecture optique
US4574371A (en) 1982-02-20 1986-03-04 Olympus Optical Company Limited Apparatus for recording and reproducing information on an optical disc
EP0092420A1 (en) * 1982-04-19 1983-10-26 Xerox Corporation Information storage systems
US4633451A (en) * 1982-06-30 1986-12-30 International Business Machines Corporation Optical servo for magnetic disks
EP0097774A3 (en) * 1982-06-30 1986-02-05 International Business Machines Corporation Transducing system
JPS5936338A (ja) * 1982-08-24 1984-02-28 Matsushita Electric Ind Co Ltd 光デイスク記録再生方法
US4621353A (en) * 1982-09-09 1986-11-04 Burroughs Corporation Optical memory system providing improved focusing control and improved beam combining and separating apparatus
US4559622A (en) * 1982-09-09 1985-12-17 Burroughs Corporation Optical memory system providing improved focus detection and control by detecting reflected beam diameter variations at spaced predetermined locations in the system
US4622659A (en) * 1982-09-09 1986-11-11 Burroughs Corporation Focus detection and control apparatus for maintaining accurate focusing in an optical memory system by detecting reflected beam diameter variations at spaced predetermined locations
US4720088A (en) * 1983-05-18 1988-01-19 Canon Kabushiki Kaisha Optical system supporting device
NL8303168A (nl) * 1983-09-14 1985-04-01 Philips Nv Inrichting voor het uitlezen van balken gecodeerde informatie.
NL8400632A (nl) * 1984-02-29 1985-09-16 Philips Nv Inrichting voor het opwekken van elektromagnetische straling.
DE3413748A1 (de) * 1984-04-12 1985-10-17 Telefunken electronic GmbH, 7100 Heilbronn Optisches system
US4742506A (en) * 1984-07-12 1988-05-03 Sony Corporation Tracking error detecting apparatus for an optical head with skew error reduction by using an inclined header portion
JPH0762913B2 (ja) * 1984-08-17 1995-07-05 株式会社日立製作所 自動焦点制御方法
JPS61174021U (nl) * 1986-03-20 1986-10-29
JP2772521B2 (ja) * 1987-11-04 1998-07-02 旭光学工業株式会社 投光反射型光検出器の光学系
US5043569A (en) * 1987-11-04 1991-08-27 Asahi Kogaku Kogyo Kabushiki Kaisha Optical system of laser beam reader
US5047625A (en) * 1987-11-04 1991-09-10 Asahi Kogaku Kogyo Kabushiki Kaisha Optical system of laser beam reader
US5179269A (en) * 1989-03-01 1993-01-12 Asahi Kogaku Kogyo Kabushiki Kaisha Bar code reader having an automatically actuated visible light laser beam
NL8901442A (nl) * 1989-06-07 1991-01-02 Philips Nv Werkwijze en inrichting voor het bepalen van de positie van een vlak.
JPH0756706B2 (ja) * 1991-09-13 1995-06-14 株式会社日立製作所 光ディスク装置
JPH07140381A (ja) * 1993-11-18 1995-06-02 Sony Corp コマ収差補正方法
JPH0983082A (ja) * 1995-09-19 1997-03-28 Hitachi Ltd 半導体レーザ素子及び光ディスク装置、並びに光軸調整方法
WO2008103188A1 (en) * 2007-02-23 2008-08-28 Alfalight, Inc High efficiency partial distributed feedback (p-dfb) laser
US8180950B2 (en) * 2007-06-15 2012-05-15 International Business Machines Corporation Apparatus and method to manage information using an optical and holographic data storage medium

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Publication number Priority date Publication date Assignee Title
US3402366A (en) * 1965-02-26 1968-09-17 Ibm Beam scanning in injection lasers
US3436679A (en) * 1966-03-07 1969-04-01 Gen Electric Semiconductor junction laser with electronically displaceable and deflectable beam
US3673412A (en) * 1970-03-02 1972-06-27 Trw Inc Radiant energy beam scanning method and apparatus
AR205243A1 (es) * 1972-05-11 1976-04-21 Philips Nv Aparato para la lectura de un portador de grabacion reflector plano
NL160138C (nl) * 1972-05-11 1979-09-17 Philips Nv Inrichting voor het uitlezen van een vlakke registratie- drager.
NL7312139A (nl) * 1972-09-08 1974-03-12
NL7215307A (nl) * 1972-11-11 1974-05-14
JPS5951049B2 (ja) * 1973-01-10 1984-12-12 株式会社日立製作所 情報再生装置
DE2317157A1 (de) * 1973-04-05 1974-10-31 Applied Laser Technology Inc Datenspeicher- und pruefvorrichtung
US3812477A (en) * 1973-04-09 1974-05-21 Ibm Method for superresolution in an optical memory
JPS5148912B2 (nl) * 1973-05-22 1976-12-23
DE2445333A1 (de) * 1973-10-01 1975-04-10 Philips Nv Optoelektronisches system zur bestimmung einer abweichung zwischen der istlage und der sollage einer ebene in einem optischen abbildungssystem
NL7313454A (nl) * 1973-10-01 1975-04-03 Philips Nv Opto-elektronisch stelsel voor het bepalen van een king tussen de werkelijke positie van een stralings kterend vlak in een optisch afbeeldingsstelsel en d ste positie van dit vlak.
FR2251876B1 (nl) * 1973-11-16 1977-09-23 Thomson Brandt
US3931460A (en) * 1974-02-04 1976-01-06 Zenith Radio Corporation Video disc with multiturn undulating storage track
US3932700A (en) * 1974-02-04 1976-01-13 Zenith Radio Corporation Focus tracking registration for optical reproducing systems
JPS5760693B2 (nl) * 1974-02-12 1982-12-21 Sony Corp
NL7402012A (nl) * 1974-02-14 1975-08-18 Philips Nv Registratiedrager waarop informatie is aange- bracht in een optisch uitleesbare struktuur.
FR2271585B1 (nl) * 1974-05-14 1976-10-15 Philips Nv
JPS5126560A (nl) * 1974-08-30 1976-03-04 Hitachi Ltd
US4190775A (en) * 1975-02-18 1980-02-26 Agency Of Industrial Science & Technology Optical memory playback apparatus
JPS594772B2 (ja) * 1976-06-02 1984-01-31 三菱電機株式会社 信号再生装置

Also Published As

Publication number Publication date
ES461197A1 (es) 1978-06-01
BR7705041A (pt) 1978-06-06
JPH01264637A (ja) 1989-10-20
GB1584664A (en) 1981-02-18
JPS5317706A (en) 1978-02-18
DE2734257C2 (de) 1984-01-19
AU2741777A (en) 1979-02-01
FR2360957B1 (nl) 1985-04-05
ATA569577A (de) 1982-06-15
DK341777A (da) 1978-02-03
AT369937B (de) 1983-02-10
SE8405522L (sv) 1984-11-02
IT1085620B (it) 1985-05-28
NO772674L (no) 1978-02-03
DE2760056A1 (nl) 1982-09-16
SE8405523L (sv) 1984-11-02
FR2360957A1 (fr) 1978-03-03
PL199971A1 (pl) 1978-04-24
BE857364A (fr) 1978-02-01
SE7708701L (sv) 1978-02-03
JPS638536B2 (nl) 1988-02-23
NL7608561A (nl) 1978-02-06
NZ184779A (en) 1980-08-26
US4365323A (en) 1982-12-21
CH623147A5 (nl) 1981-05-15
SE8405523D0 (sv) 1984-11-02
PL116457B1 (en) 1981-06-30
AR216770A1 (es) 1980-01-31
SE437737B (sv) 1985-03-11
CA1109559A (en) 1981-09-22
SE453440B (sv) 1988-02-01
JPH01271925A (ja) 1989-10-31
AU514749B2 (en) 1981-02-26
DE2734257A1 (de) 1978-02-09
MX143157A (es) 1981-03-25
JPH01264638A (ja) 1989-10-20
SE8405522D0 (sv) 1984-11-02
DE2760057C2 (de) 1985-11-14

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