DE3885224T2 - Optische Abtastvorrichtung und holographischer Strahlteiler dafür. - Google Patents

Optische Abtastvorrichtung und holographischer Strahlteiler dafür.

Info

Publication number
DE3885224T2
DE3885224T2 DE88112739T DE3885224T DE3885224T2 DE 3885224 T2 DE3885224 T2 DE 3885224T2 DE 88112739 T DE88112739 T DE 88112739T DE 3885224 T DE3885224 T DE 3885224T DE 3885224 T2 DE3885224 T2 DE 3885224T2
Authority
DE
Germany
Prior art keywords
therefor
beam splitter
scanning device
optical scanning
holographic beam
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
DE88112739T
Other languages
English (en)
Other versions
DE3885224D1 (de
Inventor
Shuichi Nec Home Elect Onayama
Kazuhiko Nec Home Elect Nosaka
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.)
NEC Corp
Original Assignee
NEC Home Electronics Ltd
Nippon Electric Co 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=26536281&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE3885224(T2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from JP62243489A external-priority patent/JPS6486332A/ja
Priority claimed from JP62243488A external-priority patent/JP2701849B2/ja
Application filed by NEC Home Electronics Ltd, Nippon Electric Co Ltd filed Critical NEC Home Electronics Ltd
Application granted granted Critical
Publication of DE3885224D1 publication Critical patent/DE3885224D1/de
Publication of DE3885224T2 publication Critical patent/DE3885224T2/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
    • G11B7/08—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
    • G11B7/0916—Foucault or knife-edge methods
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/32—Holograms used as optical 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
    • G11B7/12—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
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1381—Non-lens elements for altering the properties of the beam, e.g. knife edges, slits, filters or stops
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Head (AREA)
  • Optical Recording Or Reproduction (AREA)
DE88112739T 1987-09-28 1988-08-04 Optische Abtastvorrichtung und holographischer Strahlteiler dafür. Expired - Lifetime DE3885224T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP62243489A JPS6486332A (en) 1987-09-28 1987-09-28 Optical pickup
JP62243488A JP2701849B2 (ja) 1987-09-28 1987-09-28 光ピックアップ装置

Publications (2)

Publication Number Publication Date
DE3885224D1 DE3885224D1 (de) 1993-12-02
DE3885224T2 true DE3885224T2 (de) 1994-05-05

Family

ID=26536281

Family Applications (1)

Application Number Title Priority Date Filing Date
DE88112739T Expired - Lifetime DE3885224T2 (de) 1987-09-28 1988-08-04 Optische Abtastvorrichtung und holographischer Strahlteiler dafür.

Country Status (3)

Country Link
US (2) US4907847A (de)
EP (1) EP0309689B1 (de)
DE (1) DE3885224T2 (de)

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0348221B1 (de) * 1988-06-23 1994-12-14 Sharp Kabushiki Kaisha Optische Abtastvorrichtung
DE68913681T2 (de) * 1988-12-20 1994-06-16 Nec Corp Optischer Kopf zur optimalen Detektierung eines Fokusfehlers.
JPH06103543B2 (ja) * 1988-12-31 1994-12-14 三星電子株式会社 レーザピックアップ
JPH0778904B2 (ja) * 1989-01-27 1995-08-23 シャープ株式会社 光ピックアップ装置
KR940001999B1 (ko) * 1989-06-06 1994-03-12 샤프 가부시끼가이샤 광 픽업장치
JPH05502304A (ja) * 1989-08-21 1993-04-22 アモス，カール・アール 電磁現象を操作するための方法及び装置
JPH03174103A (ja) * 1989-09-19 1991-07-29 Fujitsu Ltd 色消しホログラム光学系
JP2710675B2 (ja) * 1989-10-30 1998-02-10 株式会社日本コンラックス 光学情報記録再生用光ヘッド
US5212375A (en) * 1990-10-09 1993-05-18 Olympus Optical Co., Ltd. Camera focus detection system using holographic beam splitter
US5471344A (en) * 1991-03-29 1995-11-28 Canon Kabushiki Kaisha Photographing apparatus having optical low-pass filter
KR950001073B1 (ko) * 1991-09-19 1995-02-08 삼성전자 주식회사 홀로그램(Hologram) 소자를 이용한 광 픽업 장치
US5272550A (en) * 1991-10-11 1993-12-21 International Business Machines Corporation Hologram system
CA2079620A1 (en) * 1991-10-25 1993-04-26 Roeland M. T. Hekker Holographic elements for an optical recording system
KR970008231B1 (en) * 1992-06-03 1997-05-22 Lg Electronics Inc Optical pick-up apparatus
KR950005957B1 (ko) * 1992-06-04 1995-06-07 주식회사금성사 광 픽업 시스템
JP3260426B2 (ja) * 1992-07-27 2002-02-25 松下電器産業株式会社 光学式ピックアップ装置
KR950005033B1 (ko) * 1992-11-06 1995-05-17 주식회사금성사 광픽업 장치
US6072607A (en) * 1993-10-15 2000-06-06 Sanyo Electric Co., Ltd. Optical pickup device
US5548418A (en) * 1994-01-14 1996-08-20 Dcs Corporation Holographic structured light generator
US5471046A (en) * 1994-02-25 1995-11-28 Eastman Kodak Company Camera auto-focusing system with designator using a volume holographic element
US5569904A (en) * 1994-07-19 1996-10-29 Eastman Kodak Company Multispot autofocus system having a radiation emitter which emits radiation that is divided into a plurality of discrete beams
JP3660415B2 (ja) * 1995-02-07 2005-06-15 富士通株式会社 光学記憶装置用光学デバイス
JPH10172170A (ja) * 1996-10-09 1998-06-26 Sanyo Electric Co Ltd 光ピックアップ装置およびその製造方法
EP0851414A3 (de) * 1996-12-26 2000-09-27 Sanyo Electric Co. Ltd Optische Abtastvorrichtung und Abspielgerät
JP3362768B2 (ja) * 1998-02-19 2003-01-07 株式会社ケンウッド 光ピックアップ装置
JP3691274B2 (ja) 1999-02-10 2005-09-07 ローム株式会社 光ピックアップおよびホログラム素子
DE19936007A1 (de) 1999-08-04 2001-02-15 Thomson Brandt Gmbh Gerät zum Lesen und/oder Beschreiben optischer Aufzeichnungsträger
JP4165221B2 (ja) * 2001-01-12 2008-10-15 ソニー株式会社 複合光学素子、光ピックアップ装置、光ディスク装置及び光ビーム検出方法
US6935006B2 (en) * 2002-12-18 2005-08-30 Honeywell International, Inc. Spun metal form used to manufacture dual alloy turbine wheel
GB0408383D0 (en) * 2004-04-15 2004-05-19 Koninkl Philips Electronics Nv A radio network and a method of operating a radio network
US11480793B2 (en) * 2018-10-24 2022-10-25 Google Llc Systems, devices, and methods for aligning a lens in a laser projector

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE755782A (fr) * 1969-09-05 1971-03-04 Philips Nv Filtre multiplex optique
US3767310A (en) * 1972-06-23 1973-10-23 Ibm Diffraction grating beam splitter
JPH0627907B2 (ja) * 1983-02-16 1994-04-13 株式会社日立製作所 光学的情報処理装置
US4497534A (en) * 1983-02-28 1985-02-05 International Business Machines Corporation Holographic optical head
DE3679648D1 (de) * 1985-12-10 1991-07-11 Nec Corp Optischer kopf mit einem beugungsgitter zum richten von zwei oder mehreren gebeugten lichtstrahlen auf optische detektoren.
NL8701749A (nl) * 1987-07-24 1989-02-16 Philips Nv Inrichting voor het met optische straling aftasten van een informatievlak.
EP0305169B1 (de) * 1987-08-24 1994-05-11 Sharp Kabushiki Kaisha Optische Abtastvorrichtung und optische Gitteranordnung dazu

Also Published As

Publication number Publication date
EP0309689B1 (de) 1993-10-27
US5016954A (en) 1991-05-21
DE3885224D1 (de) 1993-12-02
EP0309689A2 (de) 1989-04-05
EP0309689A3 (en) 1990-11-22
US4907847A (en) 1990-03-13

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Legal Events

Date Code Title Description
8363 Opposition against the patent
8327 Change in the person/name/address of the patent owner

Owner name: NEC CORP., TOKIO/TOKYO, JP