KR970017274A - A method for correcting aberration due to disc tilt and optical pickup for recording and reproduction using the same - Google Patents

A method for correcting aberration due to disc tilt and optical pickup for recording and reproduction using the same Download PDF

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Publication number
KR970017274A
KR970017274A KR1019950033979A KR19950033979A KR970017274A KR 970017274 A KR970017274 A KR 970017274A KR 1019950033979 A KR1019950033979 A KR 1019950033979A KR 19950033979 A KR19950033979 A KR 19950033979A KR 970017274 A KR970017274 A KR 970017274A
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KR
South Korea
Prior art keywords
disk
photodetector
recording
disk medium
tilt
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KR1019950033979A
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Korean (ko)
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KR100234255B1 (en
Inventor
정종삼
김태경
조건호
임경화
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김광호
삼성전자 주식회사
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Priority to KR1019950033979A priority Critical patent/KR100234255B1/en
Publication of KR970017274A publication Critical patent/KR970017274A/en
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Publication of KR100234255B1 publication Critical patent/KR100234255B1/en

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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
    • G11B7/08—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
    • 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
    • G11B7/0925—Electromechanical actuators for lens positioning
    • G11B7/0932—Details of sprung supports
    • 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
    • G11B7/135—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

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

Abstract

디스크 경사에 의한 수차를 보정하는 방법과 이를 이용한 기록재생용 광픽업이 개시되어 있다. 이는 디스크가 기울어지는데 따라서 그 기울어진 방향 및 정도를 신호로서 검출하고 검출된 신호를 근거로 대물렌즈를 각 방향으로 적절히 기울도록 구동하는 것이다. 디스크의 기울어짐 정도를 각 방향에 대해 검출하기 위해 그 디스크에 대한 탄젠셜 및 래디얼 방향으로 가각 분할된 복수의 영역을 갖는 광검출기를 배치하고, 대물렌즈를 각 방향으로 기울일 수 있게 지지하고 구동하는 액튜에이터가 구비된다. 디스크가 기울어지는데 따라 대물렌즈를 직접 기울여서 보정하므로 구조가 간단하며, 특히 디스크 기울어짐 허용범위를 넓히는 등 고밀도 기록재생에 있어서의 안정성에 효과적이다.Disclosed are a method for correcting aberration due to a disc tilt and an optical pickup for recording and reproduction using the same. This is to detect the inclined direction and degree as a signal as the disk is inclined, and to drive the objective lens appropriately in each direction based on the detected signal. In order to detect the degree of tilt of the disk in each direction, a photodetector having a plurality of areas divided into tangential and radial directions for the disk is disposed, and the objective lens is supported and driven to tilt in each direction. An actuator is provided. As the disk is tilted, the objective lens is directly tilted and corrected, so that the structure is simple, and in particular, it is effective for stability in high-density recording and reproduction such as widening the disk tilt tolerance.

Description

디스크 경사에 의한 수차를 보정하는 방법과 이를 이용한 기록재생용 광픽업A method for correcting aberration due to disc tilt and optical pickup for recording and reproduction using the same

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제2도는 본 발명에 따른 디스크 경사에 의한 수차를 보정하는 방법을 실시하기 위한 기록재생용 광픽업의 구성을 보인 배치도.2 is a layout view showing the configuration of an optical pickup for recording and reproducing for implementing a method for correcting aberration due to a disc tilt according to the present invention.

Claims (6)

광원에서 광을 발생시키고 이를 대물렌즈로 디스크 매체에 집속하며 그 디스크 매체의 반사광을 광검출기로 수광하여 정보의 쓰기 및/또는 읽기를 수행하는 기록재생용 광픽업에서의 그 디스크 매체의 기울어짐에 의한 수차를 보정함에 있어서, 상기한 광검출기에서 상기한 디스크 매체의 기울어짐 정도를 알리는 신호를 검출하는 단계와, 상기한 광검출기의 검출된 신호를 근거로 하여 상기한 대물렌즈를 상기한 디스크 매체가 기울어지는데 따라 기울도록 구동하는 단계를 수행하는 것을 특징으로 하는 디스크 기울어 짐에 의한 수차 보정방법.The tilt of the disk medium in the recording and reproducing optical pickup which generates light from a light source and focuses it on the disk medium with an objective lens and receives the reflected light of the disk medium with a photodetector to perform writing and / or reading of information. In correcting the aberration caused by the optical detector, the optical detector detects a signal indicative of the degree of inclination of the disk medium, and based on the detected signal of the photodetector, the disk medium is described. The method of correcting aberration by tilting the disk, characterized in that for performing a step of driving to tilt as the tilt. 제1항에 있어서, 상기한 디스크 매체의 기울어짐 정도를 알리는 신호를 검출하는 단계를, 그 디스크의 정보 트랙과 나란한 탄젠셜 방향과 그에 수직한 디스크의 래디얼 방향으로 나누어 행하고, 상기한 대물렌즈를 그 탄젠셜 방향과 래디얼 방향으로 각각 구동하는 것을 특징으로 하는 디스크 기울어짐에 의한 수차 보정방법.2. The method according to claim 1, wherein the step of detecting a signal indicative of the degree of inclination of the disk medium is divided into a tangential direction parallel to the information track of the disk and a radial direction of the disk perpendicular to the disk. A method for correcting aberration by inclination of a disc, characterized by driving in the tangential direction and the radial direction, respectively. 제1항에 있어서, 상기한 광검출기의 영역을 디스크의 정보 트랙과 나란한 탄젠셜 방향과 이에 수직한 디스크의 래디얼 방향으로 각각 적어도 2분할하여 각 분할된 영역의 신호를 선택취합하여 그 디스크의 각 방향에 대한 기울어짐을 알리는 신호를 추출하는 것을 특징으로 하는 디스크 기울어짐에 의한 수차 보정방법.2. The apparatus of claim 1, wherein the area of the photodetector is divided at least two times in a tangential direction parallel to the information track of the disc and in a radial direction of the disc perpendicular to the disc. The method of correcting aberration by tilting the disk, characterized in that for extracting a signal indicative of the tilt relative to the direction. 광원과, 이 광원에서 발생되는 광을 디스크 매체에 집속하는 대물렌즈와, 그 디스크 매체의 반사광을 수광하여 전기적 신호를 검출하는 광검출기를 포함하여 정보의 쓰기 및/또는 읽기를 수행하는 기록재생용 광픽업에 있어서, 상기한 광검출기에서 상기한 디스크 매체의 기울어짐 정도를 알리는 신호를 검출하는 검출수단과, 상기한 광검출기의 검출된 신호를 근거로 하여 상기한 대물렌즈를 상기한 디스크 매체가 기울어지는데 따라 기울도록 구동하는 구동수단이 구비된 것을 특징으로 하는 기록재생용 광픽업.Recording and reproducing information and / or reading information, including a light source, an objective lens that focuses the light generated by the light source on the disk medium, and a photodetector that receives the reflected light of the disk medium to detect electrical signals. In the optical pickup, detection means for detecting a signal indicative of the degree of inclination of the disk medium in the photodetector, and the disk medium in which the objective lens is based on the detected signal of the photodetector. The optical pickup for recording and reproducing, characterized in that the drive means for driving so as to tilt as tilted. 제4항에 있어서, 상기한 검출수단이 상기한 광검출기로서 디스크의 정보 트랙과 나란한 탄젠셜 방향과 이에 수직한 디스크의 래디얼 방향을 각각 적어도 2분할된 복수의 검출영역을 갖는 것으로 구비된 것을 특징으로 하는 기록재생용 광픽업.5. The apparatus as set forth in claim 4, wherein said detecting means is provided as said photodetector having a plurality of detection regions each divided into at least two radial directions parallel to an information track of a disc and a radial direction of a disc perpendicular thereto. Optical pickup for recording and playback. 제4항에 있어서, 상기한 구동수단이 상기한 대물렌즈가 탑재되어 있는 홀더와, 이 홀더를 디스크에 대하여 수직 및 수평 방향으로 움직이는 동시에 그 디스크의 정보트랙과 나란한 탄젠셜 방향 및 이에 수직한 디스크의 래디얼 방향으로 각각 기울수 있게 지지하는 스프링 부재와, 그 홀더의 측면에 마주하여 자속을 발생하는 복수의 자석, 그리고 그 홀더의 측면에 부착되고 그 자속에 쇄교되는 복수의 코일을 구비하여 되는 것을 특징으로 하는 기록재생용 광픽업.The disk drive according to claim 4, wherein the drive means moves the holder in which the objective lens is mounted, the holder moves in the vertical and horizontal directions with respect to the disk, and in parallel with the information track of the disk. Spring members for tilting in radial directions to each other, a plurality of magnets facing the side of the holder to generate magnetic flux, and a plurality of coils attached to the side of the holder and interlinked with the magnetic flux. Optical pickup for recording and playback characterized in that. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950033979A 1995-09-30 1995-09-30 A stigma adjusting method by the disk inclination and recording and reproducing optical pickup thereof KR100234255B1 (en)

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KR1019950033979A KR100234255B1 (en) 1995-09-30 1995-09-30 A stigma adjusting method by the disk inclination and recording and reproducing optical pickup thereof

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KR1019950033979A KR100234255B1 (en) 1995-09-30 1995-09-30 A stigma adjusting method by the disk inclination and recording and reproducing optical pickup thereof

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KR970017274A true KR970017274A (en) 1997-04-30
KR100234255B1 KR100234255B1 (en) 1999-12-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6510111B2 (en) 1998-04-30 2003-01-21 Fujitsu Limited Method and apparatus for aberration correction

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100669984B1 (en) * 2005-01-24 2007-01-19 삼성전자주식회사 Optical pick-up device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2626550B2 (en) * 1994-05-17 1997-07-02 松下電器産業株式会社 Optical disk drive

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6510111B2 (en) 1998-04-30 2003-01-21 Fujitsu Limited Method and apparatus for aberration correction
KR100364597B1 (en) * 1998-04-30 2004-02-05 후지쯔 가부시끼가이샤 Aberration correction method and aberration correction device
US7035177B2 (en) 1998-04-30 2006-04-25 Fujitsu Limited Method and apparatus for aberration correction

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KR100234255B1 (en) 1999-12-15

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