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DE3776945D1 - Optischer kopf. - Google Patents

Optischer kopf.

Info

Publication number
DE3776945D1
DE3776945D1 DE8787105721T DE3776945T DE3776945D1 DE 3776945 D1 DE3776945 D1 DE 3776945D1 DE 8787105721 T DE8787105721 T DE 8787105721T DE 3776945 T DE3776945 T DE 3776945T DE 3776945 D1 DE3776945 D1 DE 3776945D1
Authority
DE
Germany
Prior art keywords
optical head
optical
head
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
DE8787105721T
Other languages
English (en)
Inventor
Shinsuke C O Mitsubish Shikama
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 JP61089601A external-priority patent/JPS62246148A/ja
Priority claimed from JP61131237A external-priority patent/JP2648140B2/ja
Priority claimed from JP61131238A external-priority patent/JPS62287435A/ja
Priority claimed from JP61183660A external-priority patent/JPS6339144A/ja
Priority claimed from JP61183664A external-priority patent/JP2515504B2/ja
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Application granted granted Critical
Publication of DE3776945D1 publication Critical patent/DE3776945D1/de
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
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1353—Diffractive elements, e.g. holograms or gratings
    • 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
    • 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
    • G11B7/0901—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 for track following only
    • G11B7/0903—Multi-beam tracking systems
    • 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
    • G11B7/0908—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 for focusing only
    • G11B7/0909—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 for focusing only by astigmatic methods

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
  • Optical Recording Or Reproduction (AREA)
DE8787105721T 1986-04-18 1987-04-16 Optischer kopf. Expired - Lifetime DE3776945D1 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP61089601A JPS62246148A (ja) 1986-04-18 1986-04-18 光学式ヘツド装置
JP61131237A JP2648140B2 (ja) 1986-06-06 1986-06-06 光学式ヘツド装置
JP61131238A JPS62287435A (ja) 1986-06-06 1986-06-06 光学式ヘツド装置
JP61183660A JPS6339144A (ja) 1986-08-05 1986-08-05 光学式ヘツド装置
JP61183664A JP2515504B2 (ja) 1986-08-05 1986-08-05 光学式ヘツド装置

Publications (1)

Publication Number Publication Date
DE3776945D1 true DE3776945D1 (de) 1992-04-09

Family

ID=27525430

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8787105721T Expired - Lifetime DE3776945D1 (de) 1986-04-18 1987-04-16 Optischer kopf.

Country Status (3)

Country Link
US (1) US4753513A (de)
EP (1) EP0241942B1 (de)
DE (1) DE3776945D1 (de)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3786497T2 (de) * 1986-07-18 1994-02-17 Nippon Electric Co Doppelbrechendes Beugungsgitter und optischer Kopf, in welchem ein linearpolarisierter Strahl auf dieses Gitter gelenkt wird.
US4905216A (en) * 1986-12-04 1990-02-27 Pencom International Corporation Method for constructing an optical head by varying a hologram pattern
EP0273422B1 (de) * 1986-12-25 1993-07-14 Nec Corporation Verfahren und Gerät zur Erfassung von Ausrichtungs- und Fokusfehlern in einem optischen Kopf
DE3855936T2 (de) * 1987-08-24 1998-01-02 Sharp Kk Optische Abtastvorrichtung
JP2800156B2 (ja) * 1987-10-06 1998-09-21 三菱電機株式会社 光学式ヘッド装置
EP0318912B1 (de) * 1987-11-30 1994-02-02 Nec Corporation Optischer Kopf
JPH01171129A (ja) * 1987-12-25 1989-07-06 Copal Co Ltd 光学ヘッド及びトラッキング方法
NL8800057A (nl) * 1988-01-11 1989-08-01 Philips Nv Optische aftastinrichting.
NL8800133A (nl) * 1988-01-21 1989-08-16 Philips Nv Inrichting voor het met optische straling aftasten van een informatievlak.
JPH0770065B2 (ja) * 1988-04-20 1995-07-31 シャープ株式会社 光ピックアップ装置
DE68909663T2 (de) * 1988-04-26 1994-04-07 Philips Nv Anordnung zum optischen Abtasten eines magneto-optischen Aufzeichnungsträgers.
US5511050A (en) * 1988-09-21 1996-04-23 Hitachi, Ltd. Focus error detecting method and optical head using the same
US5243583A (en) * 1989-04-06 1993-09-07 Ricoh Company, Ltd. Optical pickup device with dual grating element
JPH04211202A (ja) * 1990-03-19 1992-08-03 Canon Inc 反射型回折格子および該回折格子を用いた装置
JP3109877B2 (ja) * 1991-11-18 2000-11-20 パイオニア株式会社 光学式情報再生装置
EP0543481B1 (de) * 1991-11-18 1997-02-12 Pioneer Electronic Corporation Optisches Informationsaufnahmegerät mit abgetrennt-eingeordneten Fotodetektoreinrichtungen
JP3246608B2 (ja) * 1991-11-18 2002-01-15 パイオニア株式会社 光学式情報再生装置
JP2975466B2 (ja) * 1991-11-18 1999-11-10 パイオニア株式会社 光学式情報再生装置
JPH05242512A (ja) * 1991-12-19 1993-09-21 Matsushita Electric Ind Co Ltd 光ディスク装置
EP0911822B1 (de) * 1993-02-16 2005-12-07 Nec Corporation Optischer Abtastkopf und doppelbrechendes polarisiendes Beugungsgitter und polarizierendes Hologramm
US6810176B2 (en) * 2000-08-07 2004-10-26 Rosemount Inc. Integrated transparent substrate and diffractive optical element
US6987901B2 (en) * 2002-03-01 2006-01-17 Rosemount, Inc. Optical switch with 3D waveguides
JP2010123230A (ja) * 2008-11-21 2010-06-03 Sony Disc & Digital Solutions Inc 現像方法、及び現像装置

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL160138C (nl) * 1972-05-11 1979-09-17 Philips Nv Inrichting voor het uitlezen van een vlakke registratie- drager.
US3919465A (en) * 1974-01-14 1975-11-11 Zenith Radio Corp Optical system for directly detecting spatially recorded signals
FR2359476A1 (fr) * 1976-07-23 1978-02-17 Thomson Csf Procede de lecture optique d'un support d'information et lecteur optique mettant en oeuvre un tel procede de lecture
US4223348A (en) * 1977-09-12 1980-09-16 Olympus Optical Co., Ltd. Automatic focussing device
NL7907216A (nl) * 1979-09-28 1981-03-31 Philips Nv Optisch fokusfout-detektiestelsel.
CA1174882A (en) * 1981-02-23 1984-09-25 Charles J. Kramer Plane grating polarizing beamsplitter
FR2523351B1 (fr) * 1982-03-09 1989-07-13 Thomson Csf Tete optique dans un dispositif d'enregistrement-lecture d'un support d'information
JPS58220252A (ja) * 1982-06-16 1983-12-21 Hitachi Ltd 光学式ピツクアツプのトラツキング誤差信号検出回路
JPS59167855A (ja) * 1983-03-14 1984-09-21 Canon Inc 情報記録再生装置
JPS6070924U (ja) * 1983-10-19 1985-05-20 パイオニア株式会社 焦点誤差検出装置
NL8400674A (nl) * 1984-03-02 1985-10-01 Philips Nv Inrichting voor het inschrijven en/of uitlezen van informatie in een spoor van een reflekterende registratiedrager, met een fokusregeling met verminderde spot offsetgevoeligheid.
JPS6173246A (ja) * 1984-09-17 1986-04-15 Hitachi Ltd 光学式再生装置
JPS61122944A (ja) * 1984-11-20 1986-06-10 Konishiroku Photo Ind Co Ltd 光学式情報読取装置
JPS61122945A (ja) * 1984-11-20 1986-06-10 Konishiroku Photo Ind Co Ltd 光学式情報読取装置
JPH0619838B2 (ja) * 1984-12-26 1994-03-16 株式会社日立製作所 光学式再生装置

Also Published As

Publication number Publication date
EP0241942B1 (de) 1992-03-04
EP0241942A2 (de) 1987-10-21
US4753513A (en) 1988-06-28
EP0241942A3 (en) 1988-11-30

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8320 Willingness to grant licences declared (paragraph 23)