FR2403575A1 - Systeme optique pour reproduction d'informations - Google Patents

Systeme optique pour reproduction d'informations

Info

Publication number
FR2403575A1
FR2403575A1 FR7826599A FR7826599A FR2403575A1 FR 2403575 A1 FR2403575 A1 FR 2403575A1 FR 7826599 A FR7826599 A FR 7826599A FR 7826599 A FR7826599 A FR 7826599A FR 2403575 A1 FR2403575 A1 FR 2403575A1
Authority
FR
France
Prior art keywords
optical system
reproduction
information
objective lens
lens
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
FR7826599A
Other languages
English (en)
Other versions
FR2403575B1 (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.)
Hitachi Ltd
Original Assignee
Hitachi 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 JP11139977A external-priority patent/JPS5445156A/ja
Priority claimed from JP4033378A external-priority patent/JPS54133354A/ja
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Publication of FR2403575A1 publication Critical patent/FR2403575A1/fr
Application granted granted Critical
Publication of FR2403575B1 publication Critical patent/FR2403575B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
    • G02B19/0009—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only
    • G02B19/0014—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only at least one surface having optical power
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
    • G02B19/0052—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a laser diode
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • G02B27/0938—Using specific optical elements
    • G02B27/095—Refractive optical elements
    • G02B27/0955—Lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • G02B27/0938—Using specific optical elements
    • G02B27/095—Refractive optical elements
    • G02B27/0972—Prisms
    • 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
    • G11B7/1372—Lenses

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Head (AREA)

Abstract

Le système optique selon la présente invention comprend : une lentille d'objectif 3 pour focaliser sur un disque vidéo de support d'informations ponctuelles la lumière émise par un laser 1 à semi-conducteur dont la région rayonnante présente des dimensions longitudinale et latérale différentes, et une lentille de couplage 2 disposée entre la lentille d'objectif et la source laser pour concentrer la lumière de cette dernière. La lentille de couplage a un facteur de grossissement qui n'est pas supérieur à 7. Applications : lecture des vidéo-disques.
FR7826599A 1977-09-16 1978-09-15 Systeme optique pour reproduction d'informations Granted FR2403575A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP11139977A JPS5445156A (en) 1977-09-16 1977-09-16 Optical system
JP4033378A JPS54133354A (en) 1978-04-07 1978-04-07 Optical system

Publications (2)

Publication Number Publication Date
FR2403575A1 true FR2403575A1 (fr) 1979-04-13
FR2403575B1 FR2403575B1 (fr) 1981-08-14

Family

ID=26379783

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7826599A Granted FR2403575A1 (fr) 1977-09-16 1978-09-15 Systeme optique pour reproduction d'informations

Country Status (6)

Country Link
US (1) US4235507A (fr)
CA (1) CA1109961A (fr)
DE (1) DE2840294A1 (fr)
FR (1) FR2403575A1 (fr)
GB (1) GB2006461B (fr)
NL (1) NL190494C (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0023868A1 (fr) * 1979-08-03 1981-02-11 Thomson-Csf Dispositif optique d'accès à une piste portée par un support d'information et système de mémoire optique comportant un tel dispositif
EP0148278A1 (fr) * 1983-07-06 1985-07-17 Matsushita Electric Industrial Co., Ltd. Photo-capteur

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4333173A (en) * 1979-06-15 1982-06-01 Hitachi, Ltd. Optical information processor with prismatic correction of laser beam shape
JPS57111838A (en) * 1980-12-27 1982-07-12 Olympus Optical Co Ltd Optical information reader
US4397527A (en) * 1981-02-26 1983-08-09 Eastman Kodak Company Apparatus for use in correcting beam anamorphicity by vector diffraction
JPS57196212A (en) * 1981-05-29 1982-12-02 Hitachi Ltd Optical system for semiconductor laser
US4530574A (en) * 1982-07-28 1985-07-23 Xerox Corporation Beam collimation and focusing of multi-emitter or broad emitter lasers
JPH0743469B2 (ja) * 1984-04-18 1995-05-15 ソニー株式会社 記録再生光学系の製造方法
US5027340A (en) * 1989-06-01 1991-06-25 Mitsubishi Denki Kabushiki Kaisha Object lens head assembly
JP2980938B2 (ja) * 1990-04-12 1999-11-22 株式会社ニデック 半導体レーザー光を集光するためのレンズ系
JPH05109110A (ja) * 1991-10-16 1993-04-30 Sony Corp 光学ピツクアツプ装置
US5253245A (en) * 1992-01-21 1993-10-12 International Business Machines Corporation Optical data storage tracking system
US5321718A (en) * 1993-01-28 1994-06-14 Sdl, Inc. Frequency converted laser diode and lens system therefor
JP3373079B2 (ja) * 1995-04-27 2003-02-04 大日本スクリーン製造株式会社 光学装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3974507A (en) * 1975-09-29 1976-08-10 Bell Telephone Laboratories, Incorporated Conversion of stripe-geometry junction laser emission to a spherical wavefront

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3506329A (en) * 1967-02-23 1970-04-14 Weaver Co W R Telescopic sight with adjustable negative and erector lenses
US3801181A (en) * 1968-08-10 1974-04-02 Nippon Selfoc Co Ltd Gradient index light conductor
US3855426A (en) * 1971-03-11 1974-12-17 Philips Corp Video disc recording and optical playback system therefor
US3855607A (en) * 1973-05-29 1974-12-17 Rca Corp Semiconductor injection laser with reduced divergence of emitted beam
JPS5266405A (en) * 1975-11-29 1977-06-01 Victor Co Of Japan Ltd Optical recording system of information recording discs
GB1577133A (en) * 1976-03-19 1980-10-22 Rca Corp Video information record and playback apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3974507A (en) * 1975-09-29 1976-08-10 Bell Telephone Laboratories, Incorporated Conversion of stripe-geometry junction laser emission to a spherical wavefront

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0023868A1 (fr) * 1979-08-03 1981-02-11 Thomson-Csf Dispositif optique d'accès à une piste portée par un support d'information et système de mémoire optique comportant un tel dispositif
FR2462758A1 (fr) * 1979-08-03 1981-02-13 Thomson Csf Dispositif optique d'acces a une piste portee par un support d'information et systeme de memoire optique comportant un tel dispositif
EP0148278A1 (fr) * 1983-07-06 1985-07-17 Matsushita Electric Industrial Co., Ltd. Photo-capteur
EP0148278A4 (fr) * 1983-07-06 1987-02-03 Matsushita Electric Ind Co Ltd Photo-capteur.
US4868821A (en) * 1983-07-06 1989-09-19 Matsushita Electric Industrial Co., Ltd. Optical pickup which includes a single objective lens having magnification equal to or greater than 3 and equal to or smaller than 5

Also Published As

Publication number Publication date
GB2006461A (en) 1979-05-02
NL7809382A (nl) 1979-03-20
DE2840294A1 (de) 1979-03-29
US4235507A (en) 1980-11-25
FR2403575B1 (fr) 1981-08-14
NL190494B (nl) 1993-10-18
GB2006461B (en) 1982-05-19
CA1109961A (fr) 1981-09-29
NL190494C (nl) 1994-03-16

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