KR960002211A - Optical pickup signal detection device - Google Patents

Optical pickup signal detection device Download PDF

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Publication number
KR960002211A
KR960002211A KR1019940015691A KR19940015691A KR960002211A KR 960002211 A KR960002211 A KR 960002211A KR 1019940015691 A KR1019940015691 A KR 1019940015691A KR 19940015691 A KR19940015691 A KR 19940015691A KR 960002211 A KR960002211 A KR 960002211A
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KR
South Korea
Prior art keywords
divided
grating
photodetector
signal
optical pickup
Prior art date
Application number
KR1019940015691A
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Korean (ko)
Other versions
KR100230234B1 (en
Inventor
이철우
임경화
성평용
정종삼
Original Assignee
김광호
삼성전자 주식회사
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 김광호, 삼성전자 주식회사 filed Critical 김광호
Priority to KR1019940015691A priority Critical patent/KR100230234B1/en
Priority to JP6309073A priority patent/JPH0817058A/en
Priority to NL9402164A priority patent/NL9402164A/en
Publication of KR960002211A publication Critical patent/KR960002211A/en
Application granted granted Critical
Publication of KR100230234B1 publication Critical patent/KR100230234B1/en

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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
    • G11B7/13—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
    • G11B7/13—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
    • 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
    • G11B11/1055—Disposition or mounting of transducers relative to record carriers
    • G11B11/10576—Disposition or mounting of transducers relative to record carriers with provision for moving the transducers for maintaining alignment or spacing relative to the carrier
    • 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
    • G11B7/0901—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 track following only
    • G11B7/0903—Multi-beam tracking systems
    • 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

Abstract

그레이팅과 볼라스톤 프리즘을 구비하는 광픽업에 적합하고 광기록매체의 반사광으로부터 재생 및 제어를 위한 전기적 신호를 검출하기 위한 광픽업의 신호검출장치가 개시되어 있다. 개시된 장치는 그레이팅의 회절방향과 볼라스톤 프리즘의 편광분할방향으로 각각 3등분되고 또한 중앙에 위치하는 영역이 상하 및 좌우방향으로 다시 양분되어 광기록매체의 반사광을 각각 수광하는 12개의 분할영역(10a-101)을 가지는 광검출기(20)를 구비하며, 회절방향으로 좌우 양측에 있는 분할영역들로부터 트랙제어신호를 검출한다. 그리하여 검출된 신호의 S/N비를 증대시켜 광픽업의 안정된 동작에 기여하는 것이다.Disclosed is a signal pickup apparatus of an optical pickup suitable for an optical pickup having a grating and a boston stone prism, and for detecting an electrical signal for reproduction and control from the reflected light of the optical recording medium. The disclosed apparatus comprises 12 divided regions 10a each divided into three equal parts in the diffraction direction of the grating and the polarization splitting direction of the bolas prism, and the centrally located regions are divided in the up, down and left and right directions to receive the reflected light of the optical recording medium, respectively. A photodetector 20 having -101, detecting a track control signal from the divided regions on both the right and left sides in the diffraction direction. Thus, the S / N ratio of the detected signal is increased to contribute to the stable operation of the optical pickup.

Description

광픽업의 신호검출장치Optical pickup signal detection device

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제1도는 종래 광픽업의 광학적 구성을 보인 사시도,1 is a perspective view showing an optical configuration of a conventional optical pickup,

제3도는 본 발명의 일실시예에 따른 광픽업의 신호검출장치를 보인 블록도,3 is a block diagram showing a signal detection apparatus of an optical pickup according to an embodiment of the present invention;

제4도는 본 발명의 다른 실시예에 따른 광픽업의 신호검출장치를 보인 블록도.4 is a block diagram showing a signal detection apparatus of an optical pickup according to another embodiment of the present invention.

Claims (5)

광디스크에 입사되는 입사광을 화절시키는 그레이팅과, 그 광디스크로부터 반사되는 반사광을 그레이팅의 회절방향과 수직한 방향으로 편광분할하는 볼라스톤 프리즘, 그 회절 및 편광분할된 반사광을 수광하여 전기적 신호를 검출하는 광검출기, 그리고 그 광검출기로부터 재생 및 제어신호를 추출하기 위한 회로수단을 포함하는 광픽업의 신호검출장치에 있어서, 상기 광검출기가 상기한 그레이팅의 회절방향과 볼라스톤 프리즘의 편광분할방향으로 균등하게 분할되어 각각 그 회절 및 편광분할되는 각 반사광의 적어도 일부를 수광하는 복수의 분할영역을 가지는 것을 특징으로 하는 광픽업의 신호검출장치.Grating for brightening incident light incident on the optical disk, polarized light splitting the reflected light reflected from the optical disk in a direction perpendicular to the diffraction direction of the grating, and light for receiving the diffracted and polarized light reflected light to detect an electrical signal A signal pickup device for optical pickup comprising a detector and circuit means for extracting reproduction and control signals from the photodetector, wherein the photodetector is equally in the diffraction direction of the grating and the polarization split direction of the bolastone prism; And a plurality of divided areas for receiving at least a portion of each reflected light which is divided and respectively diffracted and polarized by the light pickup. 제1항에 있어서, 상기 광검출기가, 상기 그레이팅의 회절방향과 상기 볼라스톤 프리즘의 편광분할방향으로 각각 3등분되고 이중의 광축상에 위치하는 영역이 다시 상하 및 수직방향으로 각각 양분되어 총 12개의 분할영역을 가지는 것을 특징으로 하는 광픽업의 신호검출장치.The method of claim 1, wherein the photodetector is divided into three equal parts in the diffraction direction of the grating and the polarization split direction of the bolus prism, and the regions located on the dual optical axes are further divided in the vertical direction and the vertical direction, respectively. And a signal detection device for optical pickup. 제1항에 있어서, 상기 회로수다이, 상기 광검출기의 회절방향으로 좌우 양측에 분할 되어 있는 분할영역에서 검출되는 신호들을 각각 가산하는 2개군의 가산증폭기군과 이 가산증폭기군의 각 출력을 차동하여 상기 대물렌즈의 트래킹 에러의 정도를 알리는 신호를 출력하는 차동증폭기를 포함하여 되는 것을 특징으로 하는 광픽업의 신호검출장치.2. The apparatus of claim 1, wherein two groups of adder amplifiers each adding signals detected in divided regions divided into left and right sides in the diffraction direction of the circuit detector and the photodetector and the respective outputs of the adder amplifier group are differentially added. And a differential amplifier for outputting a signal indicative of the degree of tracking error of the objective lens. 광디스크에 입사되는 입사광을 화절시키는 그레이팅과 그 광디스크로부터 반사되는 반사광을 그레이팅의 회절방향과 수직한 방향으로 편광분할하는 볼라스톤 프리즘, 그 회절 및 편광분할된 반사광으로부터 전지적 신호를 검출하는 광검출기, 그리고 이 광검출기로부터 재생 및 제어신호를 출력하기 위한 회로수단을 포함하는 광픽업의 신호검출장치에 있어서, 상기 광검출기가, 상기 그레이팅의 회절방향으로 3등분되고 이중 중앙에 있는 영역이 다시 상기 볼라스톤 프리즘의 편광분할방향으로 3등분되며 이중의 광축상에 위치하는 영역이 또다시 상하 및 수직방향으로 각각 양분되어 총 8개의 분할영역을 가지는 것을 특징으로 하는 광픽업의 신호검출장치.A grating for brightening incident light incident on the optical disk and a polarization splitting of the reflected light reflected from the optical disk in a direction perpendicular to the diffraction direction of the grating, a photodetector for detecting an omniscient signal from the diffracted and polarized split light; In a signal pickup device for optical pickup including circuit means for outputting reproduction and control signals from the photodetector, the region in which the photodetector is divided into three in the diffraction direction of the grating and the center of which is the center of the bolaston An optical pickup signal detection apparatus, characterized in that the region located on the dual optical axis divided into three equal parts in the polarization split direction of the prism is divided in the vertical direction and the vertical direction to have a total of eight divided regions. 제4항에 있어서, 상기 회로수단이, 상기 회절방향으로 좌측에 있는 2개의 분할영역에서 검출되는 신호들을 차동하여 상기 대물렌즈의 트래킹에러를 알리는 신호를 출력하는 차동증폭기를 포함하는 것을 특징으로 하는 광픽업의 신호검출장치.The method of claim 4, wherein the circuit means comprises a differential amplifier for outputting a signal indicating a tracking error of the objective lens by differentially detecting signals detected in two divided regions on the left side in the diffraction direction. Optical pickup signal detection device. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940015691A 1994-06-30 1994-06-30 Signal detector of optical pickup KR100230234B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR1019940015691A KR100230234B1 (en) 1994-06-30 1994-06-30 Signal detector of optical pickup
JP6309073A JPH0817058A (en) 1994-06-30 1994-12-13 Signal detector of optical pickup
NL9402164A NL9402164A (en) 1994-06-30 1994-12-20 Device for detecting a signal from a recording device.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019940015691A KR100230234B1 (en) 1994-06-30 1994-06-30 Signal detector of optical pickup

Publications (2)

Publication Number Publication Date
KR960002211A true KR960002211A (en) 1996-01-26
KR100230234B1 KR100230234B1 (en) 1999-11-15

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Application Number Title Priority Date Filing Date
KR1019940015691A KR100230234B1 (en) 1994-06-30 1994-06-30 Signal detector of optical pickup

Country Status (3)

Country Link
JP (1) JPH0817058A (en)
KR (1) KR100230234B1 (en)
NL (1) NL9402164A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100234333B1 (en) * 1996-09-23 1999-12-15 윤종용 Optical pickup apparatus

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1107242A3 (en) * 1999-12-10 2001-09-26 Victor Company Of Japan, Ltd. Optical pick-up
JP4843844B2 (en) * 1999-12-27 2011-12-21 ソニー株式会社 Optical head, light emitting / receiving element, and optical recording medium recording / reproducing apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06111334A (en) * 1992-09-24 1994-04-22 Sony Corp Recording and/or reproducing device for disk recording medium, optical detector and optical head

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100234333B1 (en) * 1996-09-23 1999-12-15 윤종용 Optical pickup apparatus

Also Published As

Publication number Publication date
JPH0817058A (en) 1996-01-19
NL9402164A (en) 1996-02-01
KR100230234B1 (en) 1999-11-15

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