KR970050310A - 두께가 다른 디스크의 호환이 가능한 기록재생용 광픽업 - Google Patents

두께가 다른 디스크의 호환이 가능한 기록재생용 광픽업 Download PDF

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KR970050310A
KR970050310A KR1019950047452A KR19950047452A KR970050310A KR 970050310 A KR970050310 A KR 970050310A KR 1019950047452 A KR1019950047452 A KR 1019950047452A KR 19950047452 A KR19950047452 A KR 19950047452A KR 970050310 A KR970050310 A KR 970050310A
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South Korea
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light
objective lens
discs
recording
optical pickup
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KR1019950047452A
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English (en)
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KR100269105B1 (ko
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유장훈
정종삼
이철우
임경화
조건호
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김광호
삼성전자 주식회사
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Priority to KR1019950047452A priority Critical patent/KR100269105B1/ko
Priority to EP96308733A priority patent/EP0777221B1/en
Priority to DE69629899T priority patent/DE69629899T2/de
Priority to JP8325657A priority patent/JP3043287B2/ja
Priority to US08/761,826 priority patent/US5777973A/en
Priority to MYPI96005140A priority patent/MY117678A/en
Priority to CN96121478A priority patent/CN1077999C/zh
Priority to TW087219110U priority patent/TW419103U/zh
Publication of KR970050310A publication Critical patent/KR970050310A/ko
Application granted granted Critical
Publication of KR100269105B1 publication Critical patent/KR100269105B1/ko

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    • 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
    • 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
    • G11B7/13—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
    • G11B7/13—Optical detectors therefor
    • G11B7/133—Shape of individual detector 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
    • G11B7/1365—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
    • G11B7/1381—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
    • 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
    • G11B7/002—Recording, reproducing or erasing systems characterised by the shape or form of the carrier
    • G11B7/0037—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with discs
    • 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

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

기록재생용 광픽-업, 특히 두께가 다른 디스크의 호환이 가능한 것으로서, 광원에서 대물렌즈로 향하는 광의근축부를 0차투과광과 1차회절광으로 회절시키고 그 광의 원축부를 그대로 투과시키는 회절격자패턴을 갖는 투명판과 제1, 제2수광부를 갖는 광검출기를 구배하여 된다. 얇은 디스크에는 그 0차 투과광과 투과된 과이 대물렌즈의 모든 개구로 집속되고, 두꺼운 디스크에는 그 1차회절광이 대물렌즈의 개구 일부에 의해 집속되게 된다. 그리고 그들의 반사광은 각각 광검출기의 제1, 제2수광부에 검출된다. 제1, 제2수광부의 검출신호로 디스크 각각에 대한 재생 및 서보를 위한 신호를 검출하므로 사용 디스크의 두께와 무관하게 안정된 서보와 잡음없는 재생이 가능한 것이다.

Description

두께가 다른 디스크의 호환이 가능한 기록재생용 광픽-업
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명의 실시예에 따른 두께가 다른 디스크의 호환이 가능한 기록재생용 광픽-업의 광학적 구성을 보인 배치도,
제2도는 제1도에 도시된 회절격자 패턴을 갖는 투명판에 대한 광로를 설명하는 광학적 프로파일,
제3도는 제1도에 도시된 광검출기의 상세한 평면도.

Claims (7)

  1. 광원과 이 광원으로부터 발생되는 광을 디스크에 집속하는 대물렌즈와 디스크에서 반사되는 광을 수광하여 신호를 검출하는 광검출기를 가지는 광픽업에 있어서, 상기한 광원에서 대물렌즈로 향하는 광의 근축부를 광축과 어긋나는 방향으로 회절시키도록 형성된 회절격자 패턴을 가지고 있는 그 회절격자 패턴의 주위에서 그 광의 원축부를 투과시키는 투명판이 구비되어, 그 회절격자 패턴에 의한 0차투과광이 그 주위를 투과하는 광의 주변부와 함께 상기한 대물렌즈에 의하여 두께가 얇은 디스크에 집속되고, 그 회절격자 패턴에 의한 1차회절광이 대물렌즈에 의하여 두께가 두꺼운 디스크에 집속되도록 구성된 것을 특징으로 하는 두께가 다른 디스크의 호환이 가능한 기록재생용 광픽업.
  2. 제1항에 있어서, 상기한 투명판의 회절격자의 패턴이 톱날형으로 형성된 것을 특징으로 하는 두께가 다른 디스크의 호환이 가능한 기록재생용 광픽업.
  3. 제1항에 있어서, 상기한 광원과 대물렌즈 사이에 그 광원에서 대물렌즈로 향하도록 입사되는 광의 경로와 그 대물렌즈를 경유하여 되돌아 오는 광의 광로를 분리시키는 광분할기가 더 구비되고, 상기한 회절격자 패턴을 갖는 투명판과 그 광원과 광분할기 사이에 배치된 것을 특징으로 하는 두께가 다른 디스크의 호환이 가능한 기록재생용 광픽업.
  4. 제1항에 있어서, 상기한 광검출기가 그 두께가 다른 디스크들로부터 반사되는 광을 각각 수광하는 제1, 제2수광부를 갖는 것을 구비하는 것을 특징으로 하는 두께가 다른 디스크의 호환이 가능한 기록재생용 광픽업.
  5. 제4항에 있어서, 상기한 광검출기의 제1, 제2수광부가 각각 가로와 세로 방향으로 양분된 4개식의 분할영역으로 이루어지고, 그 광검출기로 향하는 상기한 디스크로부터의 반사되는 광이 경유하여 비점수차 렌즈가 더 구비된 것을 특징으로 하는 두께가 다른 디스크의 호환이 가능한 기록재생용 광픽업.
  6. 제1항에 있어서, 상기한 대물렌즈와 상기한 투명판 사이에서 상기한 투명판을 경유하여 오는 광을 0차투과광과 ±1차회절광으로 회절시키는 회절격자가 더 구비되고, 상기한 광검출기가 그 두께가 다른 디스크들로 부터 각각 반사되는 그 회절격자에 의한 0차투과광의 반사광들을 각각 수광하는 제1,제2수광부와 그 →±1차회절공의 반사광을 수광하는 제3, 제4수광부를 갖는 것을 특징으로 하는 두께가 다른 디스크의 호환이 가능한 기록재생용 광픽업.
  7. 제6항에 있어서, 상기한 광검출기의 제1,제2수광부가 각각 가로와 세로 방향으로 양분된 4개씩의 분할영역으로 이루어지고, 그 광검출기로 향하는 상기한 디스크들로부터의 반사되는 광이 경유하는 비점수차 렌즈가 더 구비된 것을 특징으로 하는 두께가 다른 디스크의 호환이 가능한 기록재생용 광픽업.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019950047452A 1995-12-07 1995-12-07 두께가다른디스크의호환이가능한기록재생용광픽업 KR100269105B1 (ko)

Priority Applications (8)

Application Number Priority Date Filing Date Title
KR1019950047452A KR100269105B1 (ko) 1995-12-07 1995-12-07 두께가다른디스크의호환이가능한기록재생용광픽업
EP96308733A EP0777221B1 (en) 1995-12-07 1996-12-03 Reproducing and recording optical pickup compatible for discs having different thicknesses
DE69629899T DE69629899T2 (de) 1995-12-07 1996-12-03 Optischer Abtastkopf zur Wiedergabe und Aufzeichnung für Plattendicke unterschiedlicher Stärke
JP8325657A JP3043287B2 (ja) 1995-12-07 1996-12-05 異なる厚さを有するディスクと互換が可能な記録再生用の光ピックアップ
US08/761,826 US5777973A (en) 1995-12-07 1996-12-06 Reproducing and recording optical pickup compatible with discs having different thicknesses
MYPI96005140A MY117678A (en) 1995-12-07 1996-12-06 Reproducing and recording optical pickup compatible for discs having different thickness
CN96121478A CN1077999C (zh) 1995-12-07 1996-12-07 兼容于具有不同厚度的光盘的再现和记录光学头
TW087219110U TW419103U (en) 1995-12-07 1996-12-07 Reproducing and recording optical pickup compatible for discs having different thicknesses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950047452A KR100269105B1 (ko) 1995-12-07 1995-12-07 두께가다른디스크의호환이가능한기록재생용광픽업

Publications (2)

Publication Number Publication Date
KR970050310A true KR970050310A (ko) 1997-07-29
KR100269105B1 KR100269105B1 (ko) 2000-10-16

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KR1019950047452A KR100269105B1 (ko) 1995-12-07 1995-12-07 두께가다른디스크의호환이가능한기록재생용광픽업

Country Status (8)

Country Link
US (1) US5777973A (ko)
EP (1) EP0777221B1 (ko)
JP (1) JP3043287B2 (ko)
KR (1) KR100269105B1 (ko)
CN (1) CN1077999C (ko)
DE (1) DE69629899T2 (ko)
MY (1) MY117678A (ko)
TW (1) TW419103U (ko)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100238266B1 (ko) * 1996-02-14 2000-02-01 윤종용 광학장치
US6259668B1 (en) 1996-02-14 2001-07-10 Samsung Electronics Co., Ltd. Recording/reproducing apparatus having an optical pickup device to read from and record information to disks of different thicknesses
JPH09282699A (ja) * 1996-04-17 1997-10-31 Nec Corp ２焦点光ヘッド装置
US6222812B1 (en) 1996-08-29 2001-04-24 Samsung Electronics Co., Ltd. Optical pickup using an optical phase plate
JP3301765B2 (ja) * 1996-10-31 2002-07-15 三洋電機株式会社 光ピックアップ装置
US6639889B1 (en) 1997-02-13 2003-10-28 Samsung Electronics Co., Ltd. Recording/reproducing apparatus including an optical pickup having an objective lens compatible with a plurality of optical disk formats
US6181667B1 (en) 1997-03-14 2001-01-30 Sanyo Electric Co., Ltd. Optical pickup apparatus capable of suppressing offset of a tracking error signal
US6304540B1 (en) 1998-03-30 2001-10-16 Samsung Electronics Co., Ltd. Optical pickup compatible with a digital versatile disk and a recordable compact disk using a holographic ring lens
KR100341335B1 (ko) * 2000-05-18 2002-06-22 윤종용 광디스크 플레이어 및 그 기록 또는 재생방법
WO2002049024A1 (en) * 2000-12-11 2002-06-20 Koninklijke Philips Electronics N.V. Device for reading and/or writing a record carrier
US20030147331A1 (en) * 2002-02-07 2003-08-07 G-Bond Optoelectronics, Inc. Optical pickup diffracting one of two laser beams to a single detector
JP4362068B2 (ja) * 2002-02-26 2009-11-11 パナソニック株式会社 光学素子及びそれを用いた光ヘッド装置、並びに、この光ヘッド装置を用いた光情報装置、並びに、この光情報装置を用いたコンピュータ、光ディスクプレーヤ、カーナビゲーションシステム、光ディスクレコーダ及び光ディスクサーバ
KR20030093683A (ko) * 2002-06-05 2003-12-11 삼성전자주식회사 호환형 광픽업
JP3772851B2 (ja) 2003-03-28 2006-05-10 ソニー株式会社 光ピックアップ装置及び光ディスク装置
JP3786367B2 (ja) * 2003-06-25 2006-06-14 船井電機株式会社 光ピックアップ装置
KR100546351B1 (ko) * 2003-07-25 2006-01-26 삼성전자주식회사 호환형 광픽업 및 이를 채용한 광 기록 및/또는 재생기기
KR100924876B1 (ko) * 2005-10-28 2009-11-02 미쓰비시덴키 가부시키가이샤 회절 광학 소자, 및 광 헤드 장치
KR20080101516A (ko) 2007-05-18 2008-11-21 삼성전자주식회사 홀로그램소자, 이를 구비하는 호환형 광픽업 및 이를채용한 광정보저장매체 시스템
KR101133562B1 (ko) * 2010-04-30 2012-04-05 한국표준과학연구원 비점수차 렌즈를 이용한 형상측정장치
KR20140106053A (ko) 2013-02-25 2014-09-03 도시바삼성스토리지테크놀러지코리아 주식회사 빔 제어 방법 및 이를 적용하는 광 픽업 장치
US9076462B2 (en) * 2013-12-03 2015-07-07 HGST Netherlands B.V. Magnetic head having a short yoke with a tapered coil structure
US9159350B1 (en) * 2014-07-02 2015-10-13 WD Media, LLC High damping cap layer for magnetic recording media
US9886977B1 (en) 2016-12-22 2018-02-06 Western Digital Technologies, Inc. Dual cap layers for heat-assisted magnetic recording media

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5281797A (en) 1991-12-26 1994-01-25 Hitachi, Ltd. Short wavelength optical disk head having a changeable aperture
JP2532818B2 (ja) * 1993-02-01 1996-09-11 松下電器産業株式会社 対物レンズおよび光ヘッド装置
KR960002259B1 (ko) * 1993-07-21 1996-02-14 정수환경기연주식회사 전기침투에 의한 난분해성 폐수 처리 장치 및 그 방법
JP3435249B2 (ja) * 1994-03-11 2003-08-11 株式会社東芝 光学ヘッド装置およびレンズ
JPH102437A (ja) * 1996-06-14 1998-01-06 Aichi Koatsu:Kk 流体緊急遮断システムと感震自動空気抜き装置

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CN1077999C (zh) 2002-01-16
KR100269105B1 (ko) 2000-10-16
EP0777221B1 (en) 2003-09-10
JP3043287B2 (ja) 2000-05-22
EP0777221A1 (en) 1997-06-04
CN1158478A (zh) 1997-09-03
TW419103U (en) 2001-01-11
JPH09180245A (ja) 1997-07-11
DE69629899D1 (de) 2003-10-16
DE69629899T2 (de) 2004-05-13
MY117678A (en) 2004-07-31
US5777973A (en) 1998-07-07

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