DE3887762D1 - Optischer Kopf. - Google Patents

Optischer Kopf.

Info

Publication number
DE3887762D1
DE3887762D1 DE88104200T DE3887762T DE3887762D1 DE 3887762 D1 DE3887762 D1 DE 3887762D1 DE 88104200 T DE88104200 T DE 88104200T DE 3887762 T DE3887762 T DE 3887762T DE 3887762 D1 DE3887762 D1 DE 3887762D1
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 - Fee Related
Application number
DE88104200T
Other languages
English (en)
Other versions
DE3887762T2 (de
Inventor
Teruhiro Shiono
Kentaro Setsune
Osamu Yamazaki
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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
Priority claimed from JP62061562A external-priority patent/JPS63228428A/ja
Priority claimed from JP62115019A external-priority patent/JPS63279439A/ja
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of DE3887762D1 publication Critical patent/DE3887762D1/de
Application granted granted Critical
Publication of DE3887762T2 publication Critical patent/DE3887762T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G11B7/1356—Double or multiple prisms, i.e. having two or more prisms in cooperation
    • 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
    • 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
    • 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
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
DE3887762T 1987-03-17 1988-03-16 Optischer Kopf. Expired - Fee Related DE3887762T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP62061562A JPS63228428A (ja) 1987-03-17 1987-03-17 光学ヘツド
JP62115019A JPS63279439A (ja) 1987-05-12 1987-05-12 光学ヘッド

Publications (2)

Publication Number Publication Date
DE3887762D1 true DE3887762D1 (de) 1994-03-24
DE3887762T2 DE3887762T2 (de) 1994-09-08

Family

ID=26402611

Family Applications (1)

Application Number Title Priority Date Filing Date
DE3887762T Expired - Fee Related DE3887762T2 (de) 1987-03-17 1988-03-16 Optischer Kopf.

Country Status (3)

Country Link
US (1) US4870632A (de)
EP (1) EP0283002B1 (de)
DE (1) DE3887762T2 (de)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE68917965T2 (de) * 1988-03-25 1995-01-05 Tosoh Corp Fehlerdetektorvorrichtung für einen optischen Abtastkopf.
JP2730756B2 (ja) * 1988-04-13 1998-03-25 日立建機株式会社 超音波探触子及びその製造方法
JPH0478029A (ja) * 1990-07-13 1992-03-12 Toshiba Corp 光学的情報記録再生装置
US5138495A (en) * 1990-07-27 1992-08-11 Matsushita Electric Industrial Co., Ltd. Diffractive optical lens
JP2617237B2 (ja) * 1990-08-28 1997-06-04 シャープ株式会社 光スポット位置検出装置
US5281802A (en) * 1991-02-20 1994-01-25 Ricoh Company, Ltd. Focus error signal detection device with separating prism
US5446710A (en) * 1992-11-06 1995-08-29 International Business Machines Corporation Focus error detection using an equal path length lateral shearing interferometer
KR100200828B1 (ko) * 1994-07-30 1999-06-15 윤종용 포커스에러 검출장치
DE69532660T2 (de) * 1994-12-28 2005-02-10 Seiko Epson Corp. Polarisations-Beleuchtungsvorrichtung und diese verwendender Projektor
US5787058A (en) * 1995-05-31 1998-07-28 Daewoo Electronics Co., Ltd. Optical pickup apparatus utilizing a polygonal prism
EP0745983A3 (de) * 1995-05-31 1998-03-04 Daewoo Electronics Co., Ltd Optischer Aufnahmekopf
KR970050336A (ko) * 1995-12-28 1997-07-29 구자홍 광픽업장치
KR19980029872A (ko) * 1996-10-28 1998-07-25 배순훈 광 픽-업장치
KR19980058055A (ko) * 1996-12-30 1998-09-25 배순훈 광 픽업 장치
US6167016A (en) * 1997-04-11 2000-12-26 Aerial Imaging Corporation Optical head with a diffractive lens for focusing a laser beam
JPH11273119A (ja) * 1998-03-24 1999-10-08 Pioneer Electron Corp 光学式ピックアップ装置
JP2000321021A (ja) * 1999-05-10 2000-11-24 Canon Inc 干渉装置、変位測定装置、及びそれを用いた情報記録又は／及び再生装置
US6243126B1 (en) * 2000-03-09 2001-06-05 Toshiba Tec Kabushiki Kaisha Image forming apparatus in which a laser beam is applied from a semiconductor laser to scan an image carrier, and method of controlling the apparatus
DE10125469B4 (de) * 2001-05-25 2008-01-10 Leica Microsystems Cms Gmbh Vorrichtung zur Ermittlung einer Lichtleistung, Mikroskop und Verfahren zur Mikroskopie
KR100480630B1 (ko) * 2002-11-13 2005-03-31 삼성전자주식회사 노이즈를 줄일 수 있도록 된 광픽업 및 편광변환기
DE102005004419A1 (de) * 2005-01-31 2006-08-03 Sick Ag Optoelektronischer Sensor
JP4655025B2 (ja) 2006-09-07 2011-03-23 パナソニック株式会社 光ピックアップ装置
JP4853424B2 (ja) * 2007-08-07 2012-01-11 パナソニック株式会社 光ピックアップ装置
EP3738147B1 (de) * 2018-01-12 2021-11-24 IRIS Industries SA Kurzwelliger infrarotdetektor und dessen integration mit cmos-kompatiblen substraten
US11579014B1 (en) * 2020-08-20 2023-02-14 Amazon Technologies, Inc. Optical detector system

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8104588A (nl) * 1981-10-08 1983-05-02 Philips Nv Bundelscheidingsprisma, werkwijze voor het vervaardigen van dit prisma en van dit prisma voorziene optische lees- en/of schrijfeenheid.
US4441175A (en) * 1982-01-25 1984-04-03 Magnetic Peripherals Inc. Partial beam focus sensing in an optical recording system
NL8303932A (nl) * 1982-11-17 1984-06-18 Pioneer Electronic Corp Opneeminrichting voor optische plaat.
DE3484723D1 (de) * 1983-09-05 1991-07-25 Mitsubishi Electric Corp Automatisches fokussierungsverfahren.
JPS60187941A (ja) * 1984-03-08 1985-09-25 Seiko Instr & Electronics Ltd 光情報検出装置
JPS61289544A (ja) * 1985-06-14 1986-12-19 Canon Inc 光ヘツド装置
JPS621141A (ja) * 1985-06-27 1987-01-07 Matsushita Electric Ind Co Ltd 光学ヘツド
JP2508478B2 (ja) * 1987-02-06 1996-06-19 ソニー株式会社 光学ヘツド

Also Published As

Publication number Publication date
EP0283002B1 (de) 1994-02-16
DE3887762T2 (de) 1994-09-08
EP0283002A3 (de) 1991-03-27
US4870632A (en) 1989-09-26
EP0283002A2 (de) 1988-09-21

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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)
8339 Ceased/non-payment of the annual fee