KR950015242A - 광픽업 - Google Patents

광픽업 Download PDF

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Publication number
KR950015242A
KR950015242A KR1019930024391A KR930024391A KR950015242A KR 950015242 A KR950015242 A KR 950015242A KR 1019930024391 A KR1019930024391 A KR 1019930024391A KR 930024391 A KR930024391 A KR 930024391A KR 950015242 A KR950015242 A KR 950015242A
Authority
KR
South Korea
Prior art keywords
detection element
objective lens
recording medium
laser beam
optical recording
Prior art date
Application number
KR1019930024391A
Other languages
English (en)
Inventor
박찬규
Original Assignee
배순훈
대우전자 주식회사
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 배순훈, 대우전자 주식회사 filed Critical 배순훈
Priority to KR1019930024391A priority Critical patent/KR950015242A/ko
Priority to US08/339,620 priority patent/US5568462A/en
Priority to JP6281895A priority patent/JPH07182665A/ja
Priority to CN94120179A priority patent/CN1046043C/zh
Publication of KR950015242A publication Critical patent/KR950015242A/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
    • 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
    • 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
    • G11B7/0916—Foucault or knife-edge methods

Landscapes

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

Abstract

본 발명은 광픽업의 포커스에러 검출장치에 관한 것으로서, 부품수가 적고, 광량의 손실을 줄일 수 있도록 개량된 광픽업을 제공한다. 본 발명은 반도체레이저와 상기 반도체레이저에 의해 발생된 레이저빔을 광기록매체에 접속시키는 대물렌즈와,광기록매체로부터 반사된 레이저빔으로부터 에러 신호를 검출하는 검출소자와, 상기 대물렌즈와 검출소자 사이에 소정각도 경사지게 배치되며 상기 반도체레이저로부터 발생된 레이저빔의 일부를 차단시켜 대물렌즈로 반사시키고 광기록매체로부터 반사되어 검출소자로 집속되는 반사빔의 일부를 차단시키는 일측면에 반사면이 형성된 나이프에지를 구비하여 구성된다. 따라서 구성부품수가 적어 구조 및 조립이 간단하고 제조원가를 낮출 수 있으며 광량의 손실을 줄일 수 있어 검출감도 및 RF신호의 출력이 향상되게 된다.

Description

광픽업
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제2도는 본 발명에 따른 광픽업의 광학계를 도시한 개략도.
제3도는 본 발명에 따른 광픽업의 에러검출 과정을 예시한 참고도.

Claims (2)

  1. 레이저빔을 발생시키는 반도체레이저와, 상기 반도체레이저에 의해 발생된 레이저빔을 광기록매체에 접속시키는 대물렌즈와,광기록매체로부터 반사된 레이저빔으로부터 에러 신호를 검출하는 검출소자와, 상기 대물렌즈와 검출소자 사이에 소정각도 경사지게 배치되며 상기 반도체레이저로부터 발생된 레이저빔의 일부를 차단시켜 대물렌즈로 반사시키고 광기록매체로부터 반사되어 검출소자로 접속되는 반사빔의 일부를 차단시키는 일측면에 반사면이 형성된 나이프에지를 구비하여 구성된 것을 특징으로 하는 광픽업.
  2. 제1항에 있어서 상기 나이프에지가 대물렌즈와 검출소자를 연결하는 광축에 대하여 45도 경사지게 배치된 것을 특징으로 하는 광픽업.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019930024391A 1993-11-16 1993-11-16 광픽업 KR950015242A (ko)

Priority Applications (4)

Application Number Priority Date Filing Date Title
KR1019930024391A KR950015242A (ko) 1993-11-16 1993-11-16 광픽업
US08/339,620 US5568462A (en) 1993-11-16 1994-11-15 Knife edge method for use in detecting a focussing error in an optical pickup system
JP6281895A JPH07182665A (ja) 1993-11-16 1994-11-16 光ピックアップシステム
CN94120179A CN1046043C (zh) 1993-11-16 1994-11-16 具有用作刃形边缘的光束分离器的拾光***

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019930024391A KR950015242A (ko) 1993-11-16 1993-11-16 광픽업

Publications (1)

Publication Number Publication Date
KR950015242A true KR950015242A (ko) 1995-06-16

Family

ID=19368215

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019930024391A KR950015242A (ko) 1993-11-16 1993-11-16 광픽업

Country Status (4)

Country Link
US (1) US5568462A (ko)
JP (1) JPH07182665A (ko)
KR (1) KR950015242A (ko)
CN (1) CN1046043C (ko)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100452293B1 (ko) * 2002-01-07 2004-10-08 삼성전기주식회사 광 픽업장치

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5809000A (en) * 1996-05-31 1998-09-15 Daewoo Electronics, Co., Ltd. Optical pickup system for reading optical disks of different thicknesses
KR19980029874A (ko) * 1996-10-28 1998-07-25 배순훈 광 픽-업장치
JP5946611B2 (ja) * 2011-07-15 2016-07-06 株式会社エンプラス 光レセプタクルおよびこれを備えた光モジュール

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5231621A (en) * 1986-09-05 1993-07-27 Canon Kabushiki Kaisha Focus detector which serves to split off a portion of a detected light beam only when the detected light beam is not refocused at an expected refocus point
US4873678A (en) * 1986-12-10 1989-10-10 Hitachi, Ltd. Optical head and optical information processor using the same
JP3117211B2 (ja) * 1990-05-31 2000-12-11 オリンパス光学工業株式会社 光学ヘッド
JP3067873B2 (ja) * 1992-01-20 2000-07-24 パイオニア株式会社 光ディスク及び光ディスク再生装置
KR930020374A (ko) * 1992-03-31 1993-10-19 정용문 광픽업

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100452293B1 (ko) * 2002-01-07 2004-10-08 삼성전기주식회사 광 픽업장치

Also Published As

Publication number Publication date
JPH07182665A (ja) 1995-07-21
CN1120216A (zh) 1996-04-10
CN1046043C (zh) 1999-10-27
US5568462A (en) 1996-10-22

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A201 Request for examination
E902 Notification of reason for refusal
E601 Decision to refuse application