[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

KR950034135A - 광 픽업 - Google Patents

광 픽업 Download PDF

Info

Publication number
KR950034135A
KR950034135A KR1019950012366A KR19950012366A KR950034135A KR 950034135 A KR950034135 A KR 950034135A KR 1019950012366 A KR1019950012366 A KR 1019950012366A KR 19950012366 A KR19950012366 A KR 19950012366A KR 950034135 A KR950034135 A KR 950034135A
Authority
KR
South Korea
Prior art keywords
laser
light receiving
laser beam
microlens
receiving element
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
KR1019950012366A
Other languages
English (en)
Other versions
KR100349271B1 (ko
Inventor
가쯔도시 히비노
야수꼬 데라가끼
Original Assignee
다까노 야스아끼
상요덴기 가부시끼가이샤
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 다까노 야스아끼, 상요덴기 가부시끼가이샤 filed Critical 다까노 야스아끼
Publication of KR950034135A publication Critical patent/KR950034135A/ko
Application granted granted Critical
Publication of KR100349271B1 publication Critical patent/KR100349271B1/ko
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • G11B7/126—Circuits, methods or arrangements for laser control or stabilisation
    • 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
    • G11B7/1395—Beam splitters or combiners
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10532—Heads
    • G11B11/10541—Heads for reproducing
    • G11B11/10543—Heads for reproducing using optical beam of radiation
    • 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
    • G11B7/123—Integrated head arrangements, e.g. with source and detectors mounted on the same substrate
    • 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
    • G11B7/126—Circuits, methods or arrangements for laser control or stabilisation
    • G11B7/1263—Power control during transducing, e.g. by monitoring
    • 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
    • G11B7/1372—Lenses

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)

Abstract

레이저원(레이저 다이오드), 다수의 광 소자, 빔 분할기, 집속 수단(마이크로렌즈) 및 수광 수단(광 다이오드)을 포함하는 광 픽업이 기술된다. 다수의 광 소자는 레이저 다이오드로부터 방출되는 레이저 빔을 광자기디스크상에 집속하고, 광자기 디스크로부터 반사된 레이저 빔을 수광 소자상에 집속한다. 빔 분할기는 제1표면에서 이 레이저 빔의 일부를 반사시키고, 제1표면에서 이 레이저 빔의 다른 일부를 굴절시킴으로써 레이저 다이오드로부터 방출되는 레이저 빔을 분할한다. 반사된 부분은 광 소자로 들어가고, 굴절된 부분은 빔 분할기를 통과하여 제2표면으로부터 출사된다. 마이크로렌즈는 이온 교환 방법에 의해 빔 분할기의 제2표면상에 일체로 형성된다. 또한, 마이크로렌즈는 제2표면으로부터 출사되는 빔을 집속한다. 수광 소자는 마이크로렌즈에 의해 집속되는 빔을 검출한다. 레이저원, 빔 분할기, 마이크로렌즈 및 수광 소자는 공통 기판상에 장착된다.

Description

광 픽업
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명의 실시예를 따른 광픽업의 중요 부분을 도시한 도면으로서, 제1(a)도는 이의 정면도이고, 제1(b)도는 이의 투시도이다. 제2도는 본 발명의 다른 실시예에 따른 광 픽업의 중요 부분의 투시도이다.

Claims (7)

  1. 레이저 빔을 방출하는 레이저원; 상기 레이저 빔을 광자기 디스크상에 집속하고, 상기 광자기 디스크로부터 반사되는 반사된 레이저 빔을 수광 소자상에 집속하기 위한 다수의 광 소자; 상기 레이저 빔을, 상기 광소자로 들어가는 제1분할 빔 및 제2분할 빔으로 분할하기 위한 분할 수단; 상기 제2분할 빔을 집속하기 위한 집광 수단; 및 상기 집광 수단의 초점에서 상기 제2분할 빔을 검출하기 위한 수광 수단을 포함하는 것을 특징으로 하는 광 픽업.
  2. 레이저 빔을 방출하는 레이저 다이오드; 상기 레이저 빔을 광자기 디스크상에 집속하고, 상기 광자기 디스크로부터 반사되는 반사된 레이저 빔을 수광하는 수광 소자상에 집속하기 위한 다수의 광 소자; 상기 레이저 빔을, 상기 광 소자로 들어가는 제1분할 빔 및 제2분할 빔으로 분할하기 위한 분할 수단; 상기 제2분할 빔을 집속하기 위한 집광 수단; 상기 제2분할 빔에 응답하는 레벨을 갖는 검출 신호를 생성하기 위해 상기 집광 수단의 초점에서 상기 제2분할 빔을 검출하기 위한 수광 수단; 및 타겟 레벨과 상기 검출 신호의 레벨 사이의 차이를 감소시키도록 상기 레이저 다이오드에 인가된 구동 전류를 제어하기 위한 제어 수단을 포함하는 것을 특징으로 하는 광 픽업.
  3. 제1항에 있어서, 상기 레이저원, 상기 분할 수단, 상기 집광 수단 및 상기 수광 수단이 공통 기판상에 장착되는 것을 특징으로 하는 광 픽업.
  4. 레이저 빔을 방출하는 레이저원; 상기 레이저 빔을 광자기 디스크상에 집속하고, 상기 광자기 디스크로부터 반사되는 반사된 레이저 빔을 수광 소자상에 집속하기 위한 다수의 광 소자; 제1표면에서 상기 레이저 빔의 일부를 반사시키고, 상기 제1표면에서 상기 레이저 빔의 다른 일부를 굴절시킴으로써 상기 레이저 빔을 분할하기 위한 빔 분할기와, 상기 반사된 부분은 상기 광 소자들로 들어가고, 상기 굴절된 부분은 상기 빔 분할기를 통과하여 제2표면으로부터 출사되며; 상기 빔 분할기의 상기 제2표면으로부터 출사되는 상기 빔을 집속하고, 상기 제2표면상에 일체로 형성되는 마이크로렌즈; 상기 마이크로렌즈의 초점에서 마이크로렌즈에 의해 집속되는 상기 빔을 검출하기 위한 수광 소자; 및 상기 레이저원, 상기 빔 분할기, 상기 마이크로렌즈, 및 상기 수광소자가 장착된 기판을 포함하는 것을 특징으로 하는 광 픽업.
  5. 레이저 빔을 방출하기 위한 레이저원; 상기 레이저 빔을 제1분할 빔 및 제2분할 빔으로 상기 레이저 빔을 분할하기 위한 분할 수단; 상기 제2분할 빔을 집광하기 위한 집광 수단; 상기 제2분할 빔을 검출하고, 상기 제2분할 빔에 응답하여 검출 신호를 출력하기 위한 수광 소자; 및 상기 레이저원, 상기 분할 수단, 상기 집광 수단 및 상기 수광 소자가 장착된 기판을 포함하는 것을 특징으로 하는 광 픽업.
  6. 레이저 빔을 방출하기 위한 레이저원; 제1표면에서 상기 레이저 빔의 일부를 반사시키고, 상기 제1표면에서 상기 레이저 빔의 다른 일부를 굴절시킴으로써 상기 레이저 빔을 분할하기 위한 빔 분할기와, 상기 굴절된 부분은 상기 빔 분할기를 통과하여 제2표면에서 출사되며; 상기 빔 분할기의 상기 제2표면으로부터 출사되는 상기 빔을 집속하고, 상기 제2표면상에 일체로 형성되는 마이크로렌즈; 상기 마이크로렌즈의 초점에 마이크로렌즈에 의해 집속되는 상기 빔을 검출하고, 상기 마이크로렌즈에 의해 집속되는 상기 빔에 응답하여 검출 신호를 출력하기 위한 수광 소자; 및 상기 레이저원, 상기 빔 분할기, 상기 마이크로렌즈 및 상기 수광 소자가 장착된 기판을 포함하는 것을 특징으로 하는 광 픽업.
  7. 제6항에 있어서, 상기 수광 소자는 그 위에 반사 방지막을 구비하는 것을 특징으로 하는 광 픽업.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019950012366A 1994-05-19 1995-05-18 광픽업 Expired - Fee Related KR100349271B1 (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP94-131216 1994-05-19
JP13121694 1994-05-19

Publications (2)

Publication Number Publication Date
KR950034135A true KR950034135A (ko) 1995-12-26
KR100349271B1 KR100349271B1 (ko) 2002-12-11

Family

ID=15052756

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019950012366A Expired - Fee Related KR100349271B1 (ko) 1994-05-19 1995-05-18 광픽업

Country Status (2)

Country Link
US (1) US5598394A (ko)
KR (1) KR100349271B1 (ko)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0894938A (ja) * 1994-09-21 1996-04-12 Sony Corp 共焦点顕微鏡並びに光記録再生装置
JPH09320098A (ja) * 1996-05-27 1997-12-12 Sony Corp 光ピックアップ装置および複合光学装置
US6504812B2 (en) 1996-05-27 2003-01-07 Sony Corporation Optical pickup device with a plurality of laser couplers
US7038994B1 (en) * 1996-05-27 2006-05-02 Sony Corporation Optical pickup device with a plurality of laser couplers
JP3112841B2 (ja) * 1996-08-27 2000-11-27 日本電気株式会社 光ピックアップ装置
JPH10149559A (ja) * 1996-11-19 1998-06-02 Sankyo Seiki Mfg Co Ltd レーザビーム出射装置
JP2000353332A (ja) * 1999-04-19 2000-12-19 Samsung Electronics Co Ltd 光出力モジュール及びこれを採用した互換型光ピックアップ装置
JP2002100068A (ja) 2000-09-26 2002-04-05 Pioneer Electronic Corp 光ピックアップ装置
US7149383B2 (en) * 2003-06-30 2006-12-12 Finisar Corporation Optical system with reduced back reflection
TW200604565A (en) * 2004-07-22 2006-02-01 Hitachi Maxell Light shield sheet, optical apparatus, and method of manufacturing light shield sheet
US7889993B2 (en) * 2007-08-17 2011-02-15 Avago Technologies Fiber Ip (Singapore) Pte. Ltd Optical transceiver module having a front facet reflector and methods for making and using a front facet reflector

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0258450B1 (en) * 1986-02-24 1992-12-16 Sony Corporation Device for detecting focus
JPH01273238A (ja) * 1988-04-25 1989-11-01 Sony Corp 光学ヘッド装置
JPH0296622U (ko) * 1989-01-18 1990-08-01
JPH0460933A (ja) * 1990-06-26 1992-02-26 Matsushita Electric Ind Co Ltd 光ピックアップヘッド装置
US5164930A (en) * 1990-07-25 1992-11-17 Pioneer Electronic Corporation Optical pickup
US5350917A (en) * 1991-12-27 1994-09-27 Sony Corporation Opto-magnetic recording polarization optical apparatus including a laser diode and a light absorbing film
US5410468A (en) * 1992-06-26 1995-04-25 Matsushita Electric Industrial Co., Ltd. Optical pick-up apparatus

Also Published As

Publication number Publication date
US5598394A (en) 1997-01-28
KR100349271B1 (ko) 2002-12-11

Similar Documents

Publication Publication Date Title
KR950034135A (ko) 광 픽업
KR890005491A (ko) 작은 면적 대역상의 물체의 곡률을 변화시키는 광학 시스템
KR960032359A (ko) 레이저 다이오드를 이용한 자동 초점 조절 장치
KR890002841A (ko) 광학 픽업장치
KR980004513A (ko) 광픽업장치
KR950030064A (ko) 광픽업장치
KR950015238A (ko) 포커스 에러 검출장치
US5357102A (en) Tilted light detection device for preventing undesirable retro-reflection
KR970017245A (ko) 듀얼 포커스 광 픽업장치
KR960005480A (ko) 포커스에러 검출장치
JPH07105547A (ja) オートフォーカス機構
KR970029432A (ko) 초소형 광 픽-업장치
KR950015239A (ko) 포커스 에러 검출장치
KR970007871A (ko) 광픽업장치
KR960025412A (ko) 양면 디스크용 광 픽업
KR930008763A (ko) 광 픽업 장치
KR970017267A (ko) 광픽업장치
KR930000841Y1 (ko) 광픽업의 포커스 에러 검출장치
KR970022389A (ko) 광학식 자동촛점장치 및 그 방법
TW198115B (en) Optical pickup head with stop
JPH09129916A (ja) 光学センサ
KR970012384A (ko) 광픽업장치
JPH10134397A (ja) 光学ヘッド
KR980004449A (ko) 박형 광픽업 구조
JPS60231103A (ja) 反射型光スイツチ

Legal Events

Date Code Title Description
PA0109 Patent application

Patent event code: PA01091R01D

Comment text: Patent Application

Patent event date: 19950518

PG1501 Laying open of application
A201 Request for examination
PA0201 Request for examination

Patent event code: PA02012R01D

Patent event date: 20000114

Comment text: Request for Examination of Application

Patent event code: PA02011R01I

Patent event date: 19950518

Comment text: Patent Application

E902 Notification of reason for refusal
PE0902 Notice of grounds for rejection

Comment text: Notification of reason for refusal

Patent event date: 20011031

Patent event code: PE09021S01D

E701 Decision to grant or registration of patent right
PE0701 Decision of registration

Patent event code: PE07011S01D

Comment text: Decision to Grant Registration

Patent event date: 20020625

GRNT Written decision to grant
PR0701 Registration of establishment

Comment text: Registration of Establishment

Patent event date: 20020806

Patent event code: PR07011E01D

PR1002 Payment of registration fee

Payment date: 20020807

End annual number: 3

Start annual number: 1

PG1601 Publication of registration
LAPS Lapse due to unpaid annual fee
PC1903 Unpaid annual fee

Termination category: Default of registration fee

Termination date: 20060710