KR920700447A - 광학기록 및/또는 재생장치 - Google Patents

광학기록 및/또는 재생장치

Info

Publication number
KR920700447A
KR920700447A KR1019900702638A KR900702638A KR920700447A KR 920700447 A KR920700447 A KR 920700447A KR 1019900702638 A KR1019900702638 A KR 1019900702638A KR 900702638 A KR900702638 A KR 900702638A KR 920700447 A KR920700447 A KR 920700447A
Authority
KR
South Korea
Prior art keywords
beams
disc
recording medium
main beam
main
Prior art date
Application number
KR1019900702638A
Other languages
English (en)
Other versions
KR940001450B1 (ko
Inventor
기요시 오사또
Original Assignee
오가 노리오
소니 가부시기가이샤
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 오가 노리오, 소니 가부시기가이샤 filed Critical 오가 노리오
Publication of KR920700447A publication Critical patent/KR920700447A/ko
Application granted granted Critical
Publication of KR940001450B1 publication Critical patent/KR940001450B1/ko

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
    • 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
    • G11B7/14—Heads, e.g. forming of the optical beam spot or modulation of the optical beam specially adapted to record on, or to reproduce from, more than one track simultaneously
    • 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
    • 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
    • G11B7/095—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 specially adapted for discs, e.g. for compensation of eccentricity or wobble
    • G11B7/0956—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 specially adapted for discs, e.g. for compensation of eccentricity or wobble to compensate for tilt, skew, warp or inclination of the disc, i.e. maintain the optical axis at right angles to the disc

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)

Abstract

내용 없음

Description

광학기록 및/또는 재생장치
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본원 발명에 관한 광학기록 및/또는 재생장치의 일예의 요부(要部)의 개략구성도,
제2도는 제1도에 도시된 요부에 있어서의 광학계에 사용되는 반도체레이저부의 설명을 위한 도면,
제4도는 본원 발명에 관한 광학기록 및/또는 재생장치의 일예에 의한 디스크상에 있어서의 빔스폿형성상태의 도면.

Claims (4)

  1. N개(N는 2이상의 플러스의 정수)의 광빔을 발하는 광빔발생원(10), 상기 N개의 광빔을 각각 주빔과 최소한 1개의 부빔으로 분할하는 광빔분할수단(22), 광검출수단(14) 및 상기 광빔분할수단(22)으로부터 얻어지는 N개의 주빔과 최소한 N개의 부빔을 디스크형 기록매체(D)에 입사시키는 동시에, 이 디스크형 기록매체(D)로부터의 N개의 주빔과 최소한 N개의 부빔을 상기 광검출수단(14)에 도입하는 광로형성부(12, 24, 26, 28)를 포함하여 이루어지는 광학계와, 상기 광검출수단(22)으로부터의 검출출력에 의거하여 신호형성을 행하는 신호형성회로부(40)를 구비하고, 상기 광로형성부(12, 24, 26, 28)가 상기 디스크형 기록매체(D)상에 있어서, 상기 N개의 주빔에 의해서 상기 디스크형 기록매체(D)에 있어서의 직경방향의 간격이 상기 디스크형 기록매체(D)에 있어서의 트랙피치의 정수배에 상당하는 N개의 주빔스폿이 배열형성되는 동시에, 상기 N개의 부빔의 각각에 의해서 그것에 대응하는 주빔에 의해 형성된 주빔스폿과의 간격이 상기 주빔스폿의 상호간격의 N배에 상당하게 되는 부빔스폿이 형성되고, 상기 주빔스폿의 각각 및 그것에 대응하는 부빔스폿이 상기 디스크형 기록매체(D)에 있어서의 직경방향으로 상기 트랙피치의 절반분의 기수배에 상당하는 간격으로 배치되도록 되며, 상기 광검출수단(22)이 상기 디스크형 기록매체(D)상에 배열형성되는 N개의 주빔스폿중 끝에 위치하는 것을 형성하는 주빔 및 그것에 대응하는 부빔을 각각 실질2분할 광검출소자로 검출하게 되고, 또한 상기 신호 형성회로부(40)가 상기 광검출수단(22)에 있어서의 주빔을 검출하는 실질 2분할 광검출 소자의 각각으로부터 얻어지는 검출출력간의 차와, 상기 광검출수단(22)에 있어서의 부빔을 검출하는 실질2분할 광검출소자의 각각으로부터 얻어지는 검출출력간의 차에 의거하여 트래킹에러신호를 형성하는 것을 특징으로 하는 광학기록 및/또는 재생장치.
  2. 제1항에 있어서, 디스크형 기록매체(D)상에 형성되는 N개의 주빔에 의한 주빔스폿이 상기 디스크형 기록매체(D)에 있어서의 기록트랙상에 위치하는 것을 특징으로 하는 광학기록 및/또는 재생장치.
  3. 제1항에 있어서, 신호형성회로부(40)가 광검출수단(14)에 있어서의 주빔을 검출하는 실질2분할 광검출소자의 각각으로부터 얻어지는 검출출력간의 차, 또는 부빔을 검출하는 실질2분할 광검출소자의 각각으로부터 얻어지는 검출출력간의 차에 대한, 상기 주빔의 강도에 대한 상기 부빔의 강도의 비에 다른 레벨조정을 행하는 레벨조정부(52)를 구비한 것을 특징으로 하는 광학기록 및/또는 재생장치.
  4. 제3항에 있어서, 신호형성회로부(40)가 N개의 주빔을 검출하는 N개의 2분할검출소자의 각각에 있어서의 2분할된 광검출영역의 각각으로부터 얻어지는 검출출력의 차에 따른 신호의 합과, N개의 부빔을 검출하는 N개의 2분할검출소자의 각각에 있어서의 2분할된 광검출영역의 각각으로부터 얻어지는 검출출력의 차에 따른 신호의 합과의 사이의 차에 의거하여, 트래킹에러신호를 얻는 것을 특징으로 하는 광학기록 및/또는 재생장치.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019900702638A 1989-04-24 1990-04-23 광학기록 및/또는 재생장치 KR940001450B1 (ko)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP1104201A JP2684763B2 (ja) 1989-04-24 1989-04-24 光学記録および／または再生装置
JP89-104201 1989-04-24
JP89-104,201 1989-04-24
PCT/JP1990/000522 WO1990013116A1 (en) 1989-04-24 1990-04-23 Optical recording/reproducing apparatus

Publications (2)

Publication Number Publication Date
KR920700447A true KR920700447A (ko) 1992-02-19
KR940001450B1 KR940001450B1 (ko) 1994-02-23

Family

ID=14374360

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019900702638A KR940001450B1 (ko) 1989-04-24 1990-04-23 광학기록 및/또는 재생장치

Country Status (6)

Country Link
US (1) US5140577A (ko)
EP (1) EP0423364B1 (ko)
JP (1) JP2684763B2 (ko)
KR (1) KR940001450B1 (ko)
DE (1) DE69020293T2 (ko)
WO (1) WO1990013116A1 (ko)

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Also Published As

Publication number Publication date
KR940001450B1 (ko) 1994-02-23
JP2684763B2 (ja) 1997-12-03
EP0423364A4 (en) 1992-03-11
DE69020293T2 (de) 1995-10-26
EP0423364B1 (en) 1995-06-21
EP0423364A1 (en) 1991-04-24
US5140577A (en) 1992-08-18
DE69020293D1 (de) 1995-07-27
WO1990013116A1 (en) 1990-11-01
JPH02282930A (ja) 1990-11-20

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