KR960038783A - Optical pickup - Google Patents

Optical pickup Download PDF

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Publication number
KR960038783A
KR960038783A KR1019960011377A KR19960011377A KR960038783A KR 960038783 A KR960038783 A KR 960038783A KR 1019960011377 A KR1019960011377 A KR 1019960011377A KR 19960011377 A KR19960011377 A KR 19960011377A KR 960038783 A KR960038783 A KR 960038783A
Authority
KR
South Korea
Prior art keywords
mirror
laser unit
disk
hologram laser
optical
Prior art date
Application number
KR1019960011377A
Other languages
Korean (ko)
Other versions
KR100297527B1 (en
Inventor
유키 나가오카
히로유키 나카무라
미치코 무라타
Original Assignee
모리시타 요이찌
마쯔시다덴기산교 가부시기가이샤
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 모리시타 요이찌, 마쯔시다덴기산교 가부시기가이샤 filed Critical 모리시타 요이찌
Publication of KR960038783A publication Critical patent/KR960038783A/en
Application granted granted Critical
Publication of KR100297527B1 publication Critical patent/KR100297527B1/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
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1353—Diffractive elements, e.g. holograms or gratings
    • 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
    • G11B7/12—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
    • G11B7/1362—Mirrors

Abstract

본 발명은, 광디스크의 기록재생장치에 사용되는 광픽업에 관한 것으로서, 박형의 광픽업을 제공하는 것을 목적으로 해서 이루어진 것이며, 그 구성에 있어서, 트래킹검출용의 서브빔(7a), (7b)을 발생시키기 위한 회절격자(2)을 형성하는 동시에 그 회절방향이 패키지의 짧은 변방향(8)과 일치하는 홀로그램레이저유닛(1)과, 이 홀로그램레이저유닛(1)을 광축(1)을 중심으로 회전가능하게 정착하는 기대(12)와, 방사되는 광을 디스크(5)면에 수직의 방향으로 반사하는 미러(3)와, 이 미러(3)와 디스크(5)면과의 사이에 배치된 대물렌즈(4)를 구비하고, 상기 홀로그램레이저유닛(1)으로부터의 광축(10)의 디스크(5)면에의 사영(10a)과 디스크(5)상의 트랙(6)의 접선방향(11)이 소정의 각도θ를 가지도록, 상기 홀로그램레이저유닛(1)과 상기 미러(3)를 상기 기대(12)에 비치시킨 것을 특징으로 한 것이다.The present invention is directed to an optical pickup used in a recording and reproducing apparatus for an optical disk, and is intended to provide a thin optical pickup. In the configuration, sub-beams 7a and 7b for tracking detection, A hologram laser unit 1 in which a diffraction grating 2 for generating the hologram laser beam 1 is formed and whose diffraction direction coincides with the short side direction 8 of the package, A mirror 3 that reflects the emitted light in a direction perpendicular to the surface of the disk 5 and a mirror 5 that is disposed between the mirror 3 and the disk 5 surface And the objective 10a of the optical axis 10 from the hologram laser unit 1 on the surface of the disk 5 and the tangential direction 11 of the track 6 on the disk 5 The hologram laser unit 1 and the mirror 3 are placed on the base 12 so as to have a predetermined angle? Is one wherein the Kin.

Description

광픽업Optical pickup

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is a trivial issue, I did not include the contents of the text.

제1도는 본 발명에 있어서의 광픽업의 광학계의 사시도.FIG. 1 is a perspective view of an optical system of an optical pickup according to the present invention. FIG.

Claims (2)

서브빔발생용의 회절격자의 회절방향이 패키지의 짧은변 방향과 일치하는 홀로그램레이저유닛과, 이 홀로 그램레이저유닛을 그 광축을 중심으로 회전가능하게 장착하는 기대와, 상기 기대에 고정되어 상기 홀로그램레이저유닛으로부터 방사되는 광빔을 디스크면에 수직의 방향으로 반사하는 미러와, 이 미러와 디스크면과의 사이에 배치된 대물렌즈를 구비하고, 상기 홀로그램레이저유닛으로부터 상기 미러에 향하는 광빔의 광축의 디스크면에의 사영과 디스크상의 메인빔투사점에서의 트랙의 접선방향과의 각도가, 소정의 값을 가지도록, 상기 홀로그램레이저유닛과 상기 미러를 상기 기대에 장착한 것을 특징으로 하는 광픽업.A hologram laser unit in which the diffraction direction of the diffraction grating for generating the sub beam coincides with the short side direction of the package; a base for mounting the holographic laser unit rotatably about its optical axis; A mirror for reflecting the light beam radiated from the laser unit in a direction perpendicular to the disk surface, and an objective lens disposed between the mirror and the disk surface, wherein the optical disk of the optical axis of the light beam directed from the hologram laser unit to the mirror, Wherein the hologram laser unit and the mirror are mounted on the base so that the angle between the projection on the plane and the tangential direction of the track at the main beam projection point on the disk has a predetermined value. 제1항에 있어서, 홀로그램레이저유닛으로부터 상기 미러에 향하는 광빔의 광축의 디스크면에의 사영과 디스크상의 메인빔투자점에서의 트랙의 접선방향과의 각도θ가, 서브빔피치를 L, 트랙피치를 P로 했을때.The optical disc according to claim 1, wherein the angle? Between the projection of the optical axis of the optical beam directed from the hologram laser unit to the mirror to the disc surface and the tangential direction of the track at the main beam investment point on the disc is L, When P is assumed. θ=arcsin(P/2L)θ = arcsin (P / 2L) 가 되도록 상기 홀로그램레이저유닛과 상기 미러를 상기 광학기대에 장착한 것을 특징으로 하는 광픽업.The hologram laser unit and the mirror are mounted on the optical base. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: It is disclosed by the contents of the first application.
KR1019960011377A 1995-04-17 1996-04-16 Optical pickup KR100297527B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP09069995A JP3163939B2 (en) 1995-04-17 1995-04-17 Optical pickup
JP95-90699 1995-04-17

Publications (2)

Publication Number Publication Date
KR960038783A true KR960038783A (en) 1996-11-21
KR100297527B1 KR100297527B1 (en) 2001-10-24

Family

ID=14005782

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019960011377A KR100297527B1 (en) 1995-04-17 1996-04-16 Optical pickup

Country Status (5)

Country Link
JP (1) JP3163939B2 (en)
KR (1) KR100297527B1 (en)
CN (1) CN1087859C (en)
SG (1) SG71677A1 (en)
TW (1) TW311221B (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0421930A (en) * 1990-05-16 1992-01-24 Ricoh Co Ltd Optical pickup device
JPH076442A (en) * 1993-04-23 1995-01-10 Sony Corp Optical head for detecting magneto-optics

Also Published As

Publication number Publication date
CN1087859C (en) 2002-07-17
KR100297527B1 (en) 2001-10-24
SG71677A1 (en) 2000-04-18
CN1140300A (en) 1997-01-15
TW311221B (en) 1997-07-21
JP3163939B2 (en) 2001-05-08
JPH08287509A (en) 1996-11-01

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