KR960032345A - 광학픽업장치 - Google Patents

광학픽업장치 Download PDF

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Publication number
KR960032345A
KR960032345A KR1019960003593A KR19960003593A KR960032345A KR 960032345 A KR960032345 A KR 960032345A KR 1019960003593 A KR1019960003593 A KR 1019960003593A KR 19960003593 A KR19960003593 A KR 19960003593A KR 960032345 A KR960032345 A KR 960032345A
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KR
South Korea
Prior art keywords
light
recording medium
convex lens
optical recording
plane
Prior art date
Application number
KR1019960003593A
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English (en)
Other versions
KR100389072B1 (ko
Inventor
겐지 야마모또
후미사다 마에다
이사오 이찌무라
기요시 오사또
도시오 와따나베
Original Assignee
이데이 노브유끼
소니 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.)
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Publication date
Application filed by 이데이 노브유끼, 소니 가부시끼가이샤 filed Critical 이데이 노브유끼
Publication of KR960032345A publication Critical patent/KR960032345A/ko
Application granted granted Critical
Publication of KR100389072B1 publication Critical patent/KR100389072B1/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
    • G11B7/08—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
    • G11B7/1392—Means for controlling the beam wavefront, e.g. for correction of aberration
    • G11B7/13925—Means for controlling the beam wavefront, e.g. for correction of aberration active, e.g. controlled by electrical or mechanical means
    • G11B7/13927—Means for controlling the beam wavefront, e.g. for correction of aberration active, e.g. controlled by electrical or mechanical means during transducing, e.g. to correct for variation of the spherical aberration due to disc tilt or irregularities in the cover layer thickness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y10/00—Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
    • 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
    • G11B7/1374—Objective lenses
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Nanotechnology (AREA)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optical Head (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

광디스크의 두께오차로 인한 구면수차를 제거할 수 있는 광학픽업장치가 제공되어 있다. 광학픽업장치가 광학기록매체의 표면에 대향하는 평면을 가지며 소정의 굴절율을 갖는 볼록렌즈와; 상기 광학기록매체와 대물렌즈 사이에 볼록렌즈가 끼워지도록 배치된 상기 대물렌즈와; 광학기록매체의 광입사면과 볼록렌즈의 평면으로부터 반사된 빛을 집광하기 위한 집광광학계와; 상기 광학기록매체의 광입사면으로부터 반사되어 상기 집광광학계를 통과하는 빛을 검출하여 제1검출신호를 생성하는 제1광검출수단과; 상기 볼록렌즈의 평면으로부터 반사되어 상기 집광광학계를 통과하는 빛을 검출하여 제2검출신호를 생성하는 제2광검출수단과; 상기 제1 및 제2검출신호를 바탕으로 상기 광학기록매체의 상기 광입사면과 상기 볼록렌즈의 상기 평면 사이에 위치적관계를 검출하는 위치검출수단과; 상기 볼록렌즈가 상기 광학기록매체 또는 상기 대물렌즈쪽으로 대향하는 방향으로 이동하도록 함으로써, 상기 광학기록매체의 광입사면과 상기 볼록렌즈의 평면 사이의 거리가 상기 제1 및 제2검출신호에 따라서 제어되도록, 그 광축을 따라 볼록렌즈를 구동시키는 구동수단과;를 포함하고 있다.

Description

광학픽업장치
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명의 적절한 일실시예를 따르는 광학픽업장치를 나타내는 개략도이다.
제2도는 본 발명에 따르는 광학픽업장치에 사용된 볼록렌즈의 제조단계를 설명하는 도면이다.
제3도는 본 발명에 따르는 광학픽업장치의 반구형볼록렌즈에 인접한 상세구조를 나타내는 확대도이다.

Claims (2)

  1. 광학기록매체의 광입사면에 대향하는 평면을 가지며 소정의 굴절율을 갖는 볼록렌즈와; 상기 광학기록매체와 대물렌즈 사이에 상기 볼록렌즈가 끼워지도록 배치된 상기 대물렌즈와; 광학기록매체의 광입사면과 상볼록렌즈의 평면으로부터 반사된 빛을 집광하기 위한 집광광학계와; 상기 광학기록매체의 광입사면으로부터 반사되어 상기 집광광학계를 통과하는 빛을 검출하여 제1검출신호를 생성하는 제1광검출수단과; 상기 볼록렌즈의 평면으로부터 반사되어 상기 집광광학계를 통과하는 빛을 검출하여 제2검출신호를 생성하는 제2광검출수단과; 상기 제1 및 제2검출신호를 바탕으로 상기 광학기록매체의 상기 광입사면과 상기 볼록렌즈의 상기 평면 사이에 위치적 관계를 검출하는 위치검출수단과; 상기 볼록렌즈가 상기 광학기록매체 또는 상기 대물렌즈쪽으로 대향하는 방향으로 이동하도록 함으로써, 상기 광학기록매체의 광입사면과 상기 볼록렌즈의 평면 사이의 거리가 상기 제1 및 제2검출신호에 따라서 제어되도록, 그 광축을 따라 상기 볼록렌즈를 구동시키는 구동수단과;를 포함하여, 광원으로부터 입사된 빛을 광학기록매체상에 집광시키기 위한 것을 특징으로 하는 광학픽업장치.
  2. 제1항에 있어서, 상기 제1광검출수단은 그의 집광점에 대하여, 상기 광학기록매체의 광입사면으로부터 반사되어 상기 집광광학계를 통과하는 빛의 공역점에 배치되어 있으며, 상기 제2광검출수단은 그의 집광점에 대하여, 상기 볼록렌즈의 평면으로부터 반사되어 상기 집광광학계를 통과하는 빛의 공역점에 배치되어 있는 것을 특징으로 하여 구성된 광학픽업장치.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019960003593A 1995-02-15 1996-02-14 광학픽업장치 KR100389072B1 (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP95-026563 1995-02-15
JP02656395A JP3567515B2 (ja) 1995-02-15 1995-02-15 光学ピックアップ装置

Publications (2)

Publication Number Publication Date
KR960032345A true KR960032345A (ko) 1996-09-17
KR100389072B1 KR100389072B1 (ko) 2003-12-24

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KR1019960003593A KR100389072B1 (ko) 1995-02-15 1996-02-14 광학픽업장치

Country Status (4)

Country Link
US (1) US5712842A (ko)
JP (1) JP3567515B2 (ko)
KR (1) KR100389072B1 (ko)
CN (1) CN1088884C (ko)

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Also Published As

Publication number Publication date
KR100389072B1 (ko) 2003-12-24
CN1088884C (zh) 2002-08-07
CN1138727A (zh) 1996-12-25
US5712842A (en) 1998-01-27
JPH08221772A (ja) 1996-08-30
JP3567515B2 (ja) 2004-09-22

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