KR930004952A - 광기록재생장치 - Google Patents

광기록재생장치 Download PDF

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Publication number
KR930004952A
KR930004952A KR1019920014900A KR920014900A KR930004952A KR 930004952 A KR930004952 A KR 930004952A KR 1019920014900 A KR1019920014900 A KR 1019920014900A KR 920014900 A KR920014900 A KR 920014900A KR 930004952 A KR930004952 A KR 930004952A
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South Korea
Prior art keywords
condensing
laser beam
recording medium
wobbling
information recording
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KR1019920014900A
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English (en)
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KR950010418B1 (ko
Inventor
마사히사 시노다
겐지로 기메
도시야 마또자끼
게이지 나까무라
도루 요시하라
다께시 이또
Original Assignee
시기 모리야
미쯔비시덴끼 가부시끼가이샤
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Priority claimed from JP3217027A external-priority patent/JP2633420B2/ja
Priority claimed from JP3307418A external-priority patent/JP2644126B2/ja
Application filed by 시기 모리야, 미쯔비시덴끼 가부시끼가이샤 filed Critical 시기 모리야
Publication of KR930004952A publication Critical patent/KR930004952A/ko
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Publication of KR950010418B1 publication Critical patent/KR950010418B1/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
    • 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
    • G11B7/0938—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 servo format, e.g. guide tracks, pilot signals
    • 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
    • G11B7/0904—Dithered 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
    • G11B7/094—Methods and circuits for servo offset compensation

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  • Optical Recording Or Reproduction (AREA)

Abstract

내용 없음.

Description

광기록재생장치
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명의 실시예 및 종래의 광기록재생장치의 광로도,
제2도는 상기 실시예에 적용되는 정보기록매체의 워블링된 안내홈과 중심선이 일치하는 위치에 중앙의 집광스폿이 배치된 상태를 도시한 평면도,
제3도는 상기 정보기록매체의 회전이동에 의해서 안내홈이 중심선이 가장 크게 변위하고 있는 위치에 중앙의 집광스폿이 배치되어 있는 상태를 도시한 평면도.

Claims (11)

  1. 3개의 레이저빔을 발생하는 레이저빔 발생수단, 미리 일정한 주기에서 워블링되어 형성된 안내홈을 갖는 정보기록매체상에 집광조사하여 직선상에 상기 3개의 집광스폿을 형성하며. 또한 각 집광스폿의 간격이 상기 워블링의 피치의 약 1/2의 정수배로 함과 동시에 중앙의 집광스폿을 상기 안내홈에 배치해서 정보의 기록 또는 재생을 실행하게 하고, 다른 2개의 집광스폿을 상기 안내홈의 간격의 약 1/2만큼 다른 방향으로 변화시켜서 상기 안내 홈사이에 존재하는 랜드부상에 배치시키는 집광스폿 형성수단, 상기 정보기록매체에서의 반사된 각 레이저빔을 각각 입사하는 3개의 2분할광검지기 및 이 3개의 2분할 광검지기에서의 각 차출력에서 트래킹에러를 검출하는 트래킹에러 검출수단을 구비한 광기록재생장치.
  2. 특허청구의 범위 제1항에 있어서, 상기 레이저빔 발생수단은 1개의 레이저빔을 출사하는 반도체레이저와 회절격자로 이루어지는 것을 특징으로 하는 광기록재생장치.
  3. 특허청구의 범위 제1항에 있어서, 상기 레이저빔 발생수단은 1개의 발진영역에서 3개의 레이저빔을 출사하는 모놀리식형의 반도체레이저어레이 또는 3개의 발진영역에서 각각 1개의 레이저빔을 출사하는 하이브리드형의 반도체레이저 어레이인 것을 특징으로 하는 광기록재생장치.
  4. 특허청구의 범위 제1항에 있어서, 상기 정보기록매체는 선속도가 1.2-1.4m매초의 범위의 일정값으로 되도록 상기 안내홈이 22.05±1KHz에서 워블링되고, 상기 3개의 집광스폿간격으로써 워블링의 약 1.2에 해당하는 24미크론∼35미크론인 것을 특징으로 하는 광기록재생장치.
  5. 3개의 레이저빔을 발생하는 레이저빔 발생수단, 미리 일정한 주기에서 워블링되어 형성된 안내홈을 갖는 정보기록매체상에 집광조사하여 직선상에 상기 3개의 집광스폿을 형성하며, 또한 각 집광스폿의 간격이 상기 워블링의 피치의 약 1/4의 기수배로 함과 동시에 중앙의 집광스폿을 상기 안내홈의 평균적인 중심선상에 배치해서 정보의 기록 또는 재생을 실행하게 하고, 다른2개의 집광스폿을 상기 집광스폿을 사이에 두고 대향시킴과 동시에 중심선에 대해서 서로 일정거리만큼 다른 방향으로 어긋난 위치에 배치시키는 집광스폿형성수단, 상기 정보기록 매체에서의 반사된 상기 2개의 집광스폿을 각각 개별로 입사해서 검지하는 광검지기 및 이 광검지기의 출력에서 3빔법에 의해 트래킹에러를 검출하는 트래킹어레검출수단을 구비한 광기록재생장치.
  6. 특허청구의 범위 제5항에 있어서, 상기 레이저빔 발생수단은 1개의 레이저빔을 출사하는 반도체레이저와 회절격자로 이루어지는 것을 특징으로 하는 광기록재생장치.
  7. 특허청구의 범위 제5항에 있어서, 상기 레이저빔 발생수단은 1개의 발진영역에서 3개의 레이저빔을 출사하는 모놀리식형의 반도체레이저어레이 또는 3개의 발진영역에서 각각 1개의 레이저빔을 출사하는 하이브리드형의 반도체레이저 어레이인 것을 특징으로 하는 광기록재생장치.
  8. 특허청구의 범위 제5항에 있어서, 상기 정보기록매체는 선속도를 1.2-1.4m매초의 범위의 일정값으로 되도록 상기 안내홈이 22.05±1KHz에서 워블링되며, 또한 상기 3개의 집광스폿의 각 간격으로써 워블링의 피치의 약 1/4에 해당하는 11∼18미크론 또는 워블링의 피치의 약 3/4에 해당하는 33∼54미크론인 것을 특징으로 하는 광기록재생장치.
  9. 안내홈을 갖는 정보기록매체상에 광원에서의 레이저빔을 집광조사해서 정보의 기록, 재생, 소거를 실행함과 동시에 주지의 소위 푸시풀법을 사용해서 트래킹에러 검출을 실행하는 광기록재생장치에 있어서, 상기 정보기록매체에 마련된 안내홈은 미리 일정한 주기로 워블링 해서 형성되어 있음과 동시에 정보의 재생신호와 상기 푸시풀법으로 얻을 수 있는 신호에서 각각 상기 안내홈의 워블링신호성분을 추출하는 제1의 전기회로의 수단, 상기 제1의 전기회로수단에서 얻을 수 있는 2개의 워블링신호를 동기검파하는 제2이 전기회로수단 및 상기 동기검파수단에 의해 얻어진 신호와 상기 푸시풀법으로 얻을 수 있는 신호에서 트래킹에러신호를 생성하는 제3의 전기회로수단을 구비한 것을 특징으로 하는 광기록재생장치.
  10. 특허청구의 범위 제9항에 있어서, 상기 제1의 전기회로수단은 대역필터 또는 저역필터인 것을 특징으로 하는 광기록재생장치.
  11. 특허청구의 범위 제9항에 있어서, 상기 제2의 전기회로수단은 승산기인 것을 특징으로 하는 광기록재생장치.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019920014900A 1991-08-28 1992-08-19 광기록재생장치 KR950010418B1 (ko)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP3217027A JP2633420B2 (ja) 1991-08-28 1991-08-28 光記録再生装置
JP91-217027 1991-08-28
JP3307418A JP2644126B2 (ja) 1991-11-22 1991-11-22 光記録再生装置
JP91-307418 1991-11-22

Publications (2)

Publication Number Publication Date
KR930004952A true KR930004952A (ko) 1993-03-23
KR950010418B1 KR950010418B1 (ko) 1995-09-16

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KR1019920014900A KR950010418B1 (ko) 1991-08-28 1992-08-19 광기록재생장치

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US (3) US5303216A (ko)
EP (1) EP0530023B2 (ko)
KR (1) KR950010418B1 (ko)
DE (1) DE69218070T3 (ko)
SG (1) SG47439A1 (ko)

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EP0530023B1 (en) 1997-03-12
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DE69218070T2 (de) 1997-10-09
US5434834A (en) 1995-07-18
EP0530023A2 (en) 1993-03-03
DE69218070D1 (de) 1997-04-17
SG47439A1 (en) 1998-04-17
US5383169A (en) 1995-01-17
DE69218070T3 (de) 2000-10-12
EP0530023A3 (ko) 1994-01-05
KR950010418B1 (ko) 1995-09-16

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