HK1016321A1 - An optical head and an optical disk apparatus - Google Patents

An optical head and an optical disk apparatus

Info

Publication number
HK1016321A1
HK1016321A1 HK99101334A HK99101334A HK1016321A1 HK 1016321 A1 HK1016321 A1 HK 1016321A1 HK 99101334 A HK99101334 A HK 99101334A HK 99101334 A HK99101334 A HK 99101334A HK 1016321 A1 HK1016321 A1 HK 1016321A1
Authority
HK
Hong Kong
Prior art keywords
optical
disk apparatus
head
optical disk
optical head
Prior art date
Application number
HK99101334A
Other languages
English (en)
Inventor
Sadao Mizuno
Original Assignee
Matsushita Electric Ind 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
Application filed by Matsushita Electric Ind Co Ltd filed Critical Matsushita Electric Ind Co Ltd
Publication of HK1016321A1 publication Critical patent/HK1016321A1/xx

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
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • G11B7/127—Lasers; Multiple laser arrays
    • G11B7/1275—Two or more lasers having different wavelengths
    • 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
    • G11B7/139—Numerical aperture control means
    • 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
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • G11B7/127—Lasers; Multiple laser arrays
    • 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
    • G11B7/13—Optical detectors therefor
    • G11B7/131—Arrangement of detectors in a multiple array
    • 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
    • G11B7/1359—Single 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
    • G11B7/1365—Separate or integrated refractive elements, e.g. wave plates
    • G11B7/1367—Stepped phase plates
    • 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
    • G11B7/1374—Objective lenses
    • 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
    • G11B2007/0003—Recording, reproducing or erasing systems characterised by the structure or type of the carrier
    • G11B2007/0006—Recording, reproducing or erasing systems characterised by the structure or type of the carrier adapted for scanning different types of carrier, e.g. CD & DVD
    • 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
    • G11B2007/13727—Compound lenses, i.e. two or more lenses co-operating to perform a function, e.g. compound objective lens including a solid immersion lens, positive and negative lenses either bonded together or with adjustable spacing

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
HK99101334A 1997-05-30 1999-04-01 An optical head and an optical disk apparatus HK1016321A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14265597A JP3304053B2 (ja) 1997-05-30 1997-05-30 光ヘッドおよび光ディスク装置

Publications (1)

Publication Number Publication Date
HK1016321A1 true HK1016321A1 (en) 1999-10-29

Family

ID=15320422

Family Applications (1)

Application Number Title Priority Date Filing Date
HK99101334A HK1016321A1 (en) 1997-05-30 1999-04-01 An optical head and an optical disk apparatus

Country Status (7)

Country Link
US (1) US6084845A (ko)
EP (1) EP0881635B1 (ko)
JP (1) JP3304053B2 (ko)
KR (1) KR100483129B1 (ko)
CN (1) CN1137475C (ko)
DE (1) DE69807147T2 (ko)
HK (1) HK1016321A1 (ko)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6657931B1 (en) * 1959-02-02 2003-12-02 Sony Corporation Optical disc drive for performing read/write operations on optical disks
US20010050892A1 (en) * 1997-07-11 2001-12-13 Yoshitaka Takahashi Optical disk apparatus compatible with different types of mediums
KR100266223B1 (ko) * 1998-01-16 2000-09-15 구자홍 광픽업 장치
JPH11296893A (ja) * 1998-04-14 1999-10-29 Ricoh Co Ltd 光ピックアップ
JP2000011417A (ja) * 1998-06-26 2000-01-14 Toshiba Corp 半導体レーザアレイ及びその製造方法、光集積ユニット、光ピックアップ並びに光ディスク駆動装置
US6043935A (en) * 1998-07-17 2000-03-28 Hoetron, Inc. Wavelength sensitive beam combiner with aberration correction
KR20000009844A (ko) * 1998-07-29 2000-02-15 사까이 히로시 광픽업
KR100295102B1 (ko) * 1998-07-29 2001-07-12 이형도 광픽업
KR100324272B1 (ko) * 1998-08-04 2002-02-25 구자홍 광픽업 장치
KR100369467B1 (ko) * 1998-11-17 2003-04-03 삼성전자 주식회사 광픽업장치
JP2001067716A (ja) * 1999-08-31 2001-03-16 Sankyo Seiki Mfg Co Ltd 光ピックアップ装置
KR100348883B1 (ko) 1999-09-03 2002-08-17 엘지전자주식회사 비점수차 방지 광픽업 장치
US20020105892A1 (en) * 2000-06-06 2002-08-08 Seiji Onishi Optical pickup device
EP1184848B1 (en) * 2000-08-09 2005-05-11 Ricoh Company, Ltd. Optical pickup apparatus having an improved holographic unit, and optical disk drive including the same
JP2003067972A (ja) * 2001-05-29 2003-03-07 Nec Corp 光ヘッド装置および光学式情報記録再生装置
JP3849523B2 (ja) 2001-12-26 2006-11-22 ティアック株式会社 光ピックアップ及び光ディスク装置
WO2004003901A1 (ja) 2002-06-28 2004-01-08 Victor Company Of Japan, Limited 光ピックアップ
JP4200026B2 (ja) * 2003-02-06 2008-12-24 新オプトウエア株式会社 光情報記録媒体
WO2008044476A1 (fr) * 2006-10-05 2008-04-17 Panasonic Corporation Tête optique, unité de disque optique, ordinateur, lecteur de disque optique et enregistreur de disque optique
EP3660572A4 (en) * 2017-07-26 2021-06-23 Hamamatsu Photonics K.K. SAMPLE MONITORING DEVICE AND SAMPLE MONITORING METHOD

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH083906B2 (ja) * 1986-08-21 1996-01-17 松下電器産業株式会社 光ヘツド装置
US5235581A (en) * 1990-08-09 1993-08-10 Matsushita Electric Industrial Co., Ltd. Optical recording/reproducing apparatus for optical disks with various disk substrate thicknesses
JPH04141846A (ja) * 1990-10-03 1992-05-15 Nippon Telegr & Teleph Corp <Ntt> 光ヘッド
JPH07220313A (ja) * 1994-01-31 1995-08-18 Ricoh Co Ltd 光ピックアップ装置
JP3240846B2 (ja) * 1994-08-12 2001-12-25 松下電器産業株式会社 光ヘッド
EP0747893B1 (en) * 1995-06-05 2003-05-02 Nec Corporation Optical head apparatus for different types of disks
JPH10106019A (ja) * 1996-09-24 1998-04-24 Nec Corp ２波長分離型光ヘッド

Also Published As

Publication number Publication date
DE69807147D1 (de) 2002-09-19
JPH10334500A (ja) 1998-12-18
KR19980087526A (ko) 1998-12-05
KR100483129B1 (ko) 2005-09-13
JP3304053B2 (ja) 2002-07-22
EP0881635A2 (en) 1998-12-02
CN1137475C (zh) 2004-02-04
US6084845A (en) 2000-07-04
CN1208918A (zh) 1999-02-24
DE69807147T2 (de) 2002-12-12
EP0881635B1 (en) 2002-08-14
EP0881635A3 (en) 1999-01-20

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Legal Events

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PF Patent in force
PE Patent expired

Effective date: 20180528