KR860001418A - 광학식 헤드의 트랙킹 오차 검출장치 - Google Patents

광학식 헤드의 트랙킹 오차 검출장치 Download PDF

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Publication number
KR860001418A
KR860001418A KR1019850004924A KR850004924A KR860001418A KR 860001418 A KR860001418 A KR 860001418A KR 1019850004924 A KR1019850004924 A KR 1019850004924A KR 850004924 A KR850004924 A KR 850004924A KR 860001418 A KR860001418 A KR 860001418A
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KR
South Korea
Prior art keywords
semiconductor laser
tracking error
order
optical head
incident
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Application number
KR1019850004924A
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English (en)
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KR930002162B1 (ko
Inventor
도오루(외 1) 후꾸모또
Original Assignee
오오가 노리오
소니 가부시끼가이샤
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Publication of KR860001418A publication Critical patent/KR860001418A/ko
Application granted granted Critical
Publication of KR930002162B1 publication Critical patent/KR930002162B1/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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/13—Optical detectors 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
    • G11B7/12—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
    • G11B7/08—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
    • G11B7/08—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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/005—Optical components external to the laser cavity, specially adapted therefor, e.g. for homogenisation or merging of the beams or for manipulating laser pulses, e.g. pulse shaping
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/02—Structural details or components not essential to laser action
    • H01S5/022—Mountings; Housings
    • H01S5/023—Mount members, e.g. sub-mount members
    • H01S5/02325—Mechanically integrated components on mount members or optical micro-benches
    • H01S5/02326—Arrangements for relative positioning of laser diodes and optical components, e.g. grooves in the mount to fix optical fibres or lenses
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
    • Y10S430/146—Laser beam

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)

Abstract

내용 없음

Description

광학식 헤드의 트랙킹 오차 검출장치
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도 및 제2도는 본 발명에 의한 광학식 헤드의 트랙킹 오차 검출장치의 각 실시예의 반도체 레이저소자를 표시하는 정면도.
* 도면의 주요부분에 대한 부호의 설명
광학헤드 1 : 반도체 레이저소자
1 : 레이저비임 출력단면 1 : 활성층
2 : 콜리미이터 렌즈 3 : 회절격자
4 : 비임스프리터 5 : 대물렌즈
6 : 광학식 기록매체.

Claims (1)

  1. 반도체 레이저 소자와, 이 반도체 레이저 소자에서의 레이저 비임이 입사시켜지는 회절격자와, 이 회절격자에서 출사한 0차 비임 및 ±1차 비임이 통과시켜지는 비임스프리터와, 이 비임스프리터에서 출사한 0차 비임 및 ±1차 비임이 집속시켜져서 광학식 기록매체에 입사시켜지는 대물렌즈와, 상기 광학식 기록매체에 의해, 반사 시켜진 0차 비임 및 ±1차 비임이 상기 대물렌즈를 통과하여, 또다시 상기 비임스프리터의 반대면에서 반사한후, 입사시켜지는 광검출기를 갖어, 이 광검출기에서 상기 ±1차 비임에 대응하는 한쌍의 광검출 출력을 얻어, 이 한쌍의 광검출 출력의 차에 따라서 상기 0차 비임의 상기 광학식 기록매체상의 트랙킹 상태에 따른 트랙킹 오차 신호를 얻도록한 광학식 헤드의 트랙킹 오차검출 장치에 있어서, 상기 광학식 기록매체에서 반사하여, 상기 대물렌즈, 상기 비임스프리터 및 상기 회절격자를 통과하여 상기 반도체레이저 소자로 향하는 중심비임 및 그 양쪽의 양쪽 비임중 이 양쪽비임이, 상기 반도체 레이저 소자의 레이저 비임을 출사단면에 입사하지 않도록, 상기 반도체 레이저 소자의 레이저 비임 출사 단면의 형상을 선정하여 형성되는 것을 특징으로 하는 광학식 헤드의 트랙킹 오차검출장치.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019850004924A 1984-07-12 1985-07-11 광학식 헤드의 트랙킹 오차 검출장치 KR930002162B1 (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP59144927A JP2565183B2 (ja) 1984-07-12 1984-07-12 光学式ヘツドのトラツキング誤差検出装置
JP144927 1984-07-12

Publications (2)

Publication Number Publication Date
KR860001418A true KR860001418A (ko) 1986-02-26
KR930002162B1 KR930002162B1 (ko) 1993-03-27

Family

ID=15373444

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019850004924A KR930002162B1 (ko) 1984-07-12 1985-07-11 광학식 헤드의 트랙킹 오차 검출장치

Country Status (2)

Country Link
JP (1) JP2565183B2 (ko)
KR (1) KR930002162B1 (ko)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2558250B2 (ja) * 1985-08-30 1996-11-27 シャープ株式会社 光ピツクアツプ

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58188342A (ja) * 1982-04-28 1983-11-02 Hitachi Ltd 半導体レ−ザ光雑音低減方法
JPS5947778A (ja) * 1982-09-10 1984-03-17 Hitachi Ltd 半導体受光素子とそれを用いたレ−ザ発振装置

Also Published As

Publication number Publication date
JP2565183B2 (ja) 1996-12-18
KR930002162B1 (ko) 1993-03-27
JPS6124030A (ja) 1986-02-01

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