KR830009561A - 집속 제어용 광학 감지기 - Google Patents

집속 제어용 광학 감지기 Download PDF

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Publication number
KR830009561A
KR830009561A KR1019820001253A KR820001253A KR830009561A KR 830009561 A KR830009561 A KR 830009561A KR 1019820001253 A KR1019820001253 A KR 1019820001253A KR 820001253 A KR820001253 A KR 820001253A KR 830009561 A KR830009561 A KR 830009561A
Authority
KR
South Korea
Prior art keywords
reflected
cells
lens
optical sensor
prism
Prior art date
Application number
KR1019820001253A
Other languages
English (en)
Inventor
비에르 라꼬뜨 쟝
휘쇼 베르나르
뜨루드 질리에
Original Assignee
쟈끄 보아르
똥송-세에스 에프
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 쟈끄 보아르, 똥송-세에스 에프 filed Critical 쟈끄 보아르
Publication of KR830009561A publication Critical patent/KR830009561A/ko
Priority to KR2019880011117U priority Critical patent/KR880004297Y1/ko

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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
    • G11B7/135—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
    • 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
    • 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
    • G11B7/1359—Single prisms

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Automatic Focus Adjustment (AREA)
  • Measurement Of Optical Distance (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

내용 없음

Description

집속 제어용 광학 감지기
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명에 따른 감지기의 광학 계통도.
제2도는 수신 및 집속 제어 장치의 계통도.

Claims (5)

  1. 기록 매체로부터 반사된 비임의 일부는 집속렌즈를 다시 통과하고 반사된 비임 난시를 만드는 광학 소자를 통과하게 되며, 4개의 병렬 셀은 상기 난시 비임의 원형평면내에 배치되는, 이동가능한 기록 매체상에 광학 비임을 집속하기 위해 사용. 렌즈의 위치-제어용 광학 감지기에 있어서, 상기 광학 소자가 프리즘이고, 렌즈-대-영상 거리를 교정하기 위한 오차신호가 상기 4개의 셀에 의해 전달된 신호들로부터 얻어지는 것을 특징으로 하는 집속 제어용 광학 감지기.
  2. 제1항에 있어서, 집속한 후에 광학 소오스에 의해 전달된 비임이 프리즘(1)의 한면 AB로부터 반사되어 이 비임이 다시 반사되도록 반사된 비임이 기억평면에 집속되고, 상기 비임의 일부가면 AC를 통해 나오도록 면AB를 통해 프리즘으로 들어가고 그 다음 원형평면내에 배치되는 4개의 셀상에 떨어지는 것을 특징으로 하는 광학 감지기.
  3. 제2항에 있어서, 광학 소오스가 레이저인 것을 특징으로 하는 광학 감지기.
  4. 제2항에 있어서, 4개의 셀이 구형으로 되어 있고 대형구형을 형성하도록 병렬로 배치되어 있으며, 대형구형의 대각선 대향 셀에 의해 전달된 신호들이 2개의 가산회로에 인가되고, 상기 가산회로들에 의해 전달된 신호들이 차증폭기에 인가되며, 상기 증폭기는 렌즈-대-영상 거리를 조절하기 위해 제어모터에서 교정신호를 전달하는 것을 특징으로 하는 광학 감지기.
  5. 제1항에 있어서, 이동 가능한 기록매체가 비디오 디스크인 것을 특징으로 하는 광학 감지기.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019820001253A 1981-03-24 1982-03-24 집속 제어용 광학 감지기 KR830009561A (ko)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019880011117U KR880004297Y1 (ko) 1981-03-24 1988-07-08 집속제어용 광학 감지기

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8105854A FR2502800A1 (fr) 1981-03-24 1981-03-24 Senseur optique d'asservissement de focalisation
FR5854 1981-03-24

Related Child Applications (1)

Application Number Title Priority Date Filing Date
KR2019880011117U Division KR880004297Y1 (ko) 1981-03-24 1988-07-08 집속제어용 광학 감지기

Publications (1)

Publication Number Publication Date
KR830009561A true KR830009561A (ko) 1983-12-22

Family

ID=9256574

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019820001253A KR830009561A (ko) 1981-03-24 1982-03-24 집속 제어용 광학 감지기

Country Status (9)

Country Link
US (1) US4482803A (ko)
EP (1) EP0061384B1 (ko)
JP (1) JPS57169934A (ko)
KR (1) KR830009561A (ko)
CA (1) CA1195775A (ko)
DE (1) DE3260984D1 (ko)
FR (1) FR2502800A1 (ko)
HK (1) HK83989A (ko)
SU (1) SU1382410A3 (ko)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2523350B1 (fr) * 1982-03-09 1987-05-22 Thomson Csf Tete optique dans un dispositif d'enregistrement-lecture d'un support d'information
DE3477296D1 (en) * 1984-04-05 1989-04-20 Agfa Gevaert Nv Device for accurately focussing a laser beam
CA1258906A (en) * 1985-04-22 1989-08-29 Hiroshi Oinoue Semiconductor laser apparatus for optical head
JP2609221B2 (ja) * 1985-04-22 1997-05-14 ソニー株式会社 半導体レーザ装置
JP2612436B2 (ja) * 1985-10-15 1997-05-21 三菱電機株式会社 自動焦点調節装置
US4778984A (en) * 1985-10-16 1988-10-18 Canon Denshi Kabushiki Kaisha Apparatus for detecting focus from astigmatism
JPS62177734A (ja) * 1986-01-31 1987-08-04 Nec Home Electronics Ltd 光学ヘツド
US4954702A (en) * 1987-10-14 1990-09-04 Konica Corporation Process for detecting a focal point in an optical head
JP2702178B2 (ja) * 1988-09-28 1998-01-21 三菱電機株式会社 光学式ヘッド装置
CN100339681C (zh) * 2004-09-02 2007-09-26 精碟科技股份有限公司 光盘片检测装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2235448B1 (ko) * 1973-06-29 1976-05-07 Thomson Brandt
US3983317A (en) * 1974-12-09 1976-09-28 Teletype Corporation Astigmatizer for laser recording and reproducing system
US4079247A (en) * 1975-05-16 1978-03-14 Claude Bricot Optical focussing device
FR2313716A1 (fr) * 1975-06-03 1976-12-31 Thomson Brandt Systeme optique de lecture par reflexion d'un support d'information
FR2325987A1 (fr) * 1975-09-29 1977-04-22 Thomson Brandt Dispositif de lecture optique d'un enregistrement
US4025949A (en) * 1975-12-31 1977-05-24 Zenith Radio Corporation Symmetrical astigmatic focus sensing system
NL7907216A (nl) * 1979-09-28 1981-03-31 Philips Nv Optisch fokusfout-detektiestelsel.

Also Published As

Publication number Publication date
EP0061384A1 (fr) 1982-09-29
SU1382410A3 (ru) 1988-03-15
FR2502800A1 (fr) 1982-10-01
JPS57169934A (en) 1982-10-19
HK83989A (en) 1989-10-27
CA1195775A (en) 1985-10-22
DE3260984D1 (en) 1984-11-22
FR2502800B1 (ko) 1985-04-26
EP0061384B1 (fr) 1984-10-17
US4482803A (en) 1984-11-13
JPH0447377B2 (ko) 1992-08-03

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