KR960011878A - Optical pickup system with coma aberration correction finite optical system - Google Patents

Optical pickup system with coma aberration correction finite optical system Download PDF

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Publication number
KR960011878A
KR960011878A KR1019940022216A KR19940022216A KR960011878A KR 960011878 A KR960011878 A KR 960011878A KR 1019940022216 A KR1019940022216 A KR 1019940022216A KR 19940022216 A KR19940022216 A KR 19940022216A KR 960011878 A KR960011878 A KR 960011878A
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KR
South Korea
Prior art keywords
objective lens
actuator
disk
optical pickup
coma aberration
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Application number
KR1019940022216A
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Korean (ko)
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KR0126423B1 (en
Inventor
김성민
Original Assignee
배순훈
대우전자 주식회사
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Priority to KR1019940022216A priority Critical patent/KR0126423B1/en
Publication of KR960011878A publication Critical patent/KR960011878A/en
Application granted granted Critical
Publication of KR0126423B1 publication Critical patent/KR0126423B1/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
    • G11B7/12—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
    • G11B7/1378—Separate aberration correction lenses; Cylindrical lenses to generate astigmatism; Beam expanders
    • 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 Head (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

본 발명은 코마수차보정형 유한광학계를 갖춘 광픽업장치에 관한 것으로, 레이저광원(10)에서 방사되는 레이저비임을 디스크(D)상에 집광하는 대물렌즈(13)와 그 대물렌즈(13)를 2축 구동하는 액츄에이터(14), 그 액츄에이터(14)가 구성된 액츄에이터보빈(22)를 부유지지하는 와이어 서스펜션(21)이 고착되는 서스펜션플레이트(24) 및 서스펜션플레이트(24)가 지지되는 베이스장치(26)를 구비하여 구성된 유한광학계를 갖춘 광픽업장치에서 상기 디스크(D)에 대한 레이저비임의 트랙킹방향으로 상기 대물렌즈(D)의 주평면이 일정한 원주궤적을 따라 이동되도록 함으로써 상기 레이저비임의 광축에 대한 디스크(D)와 대물렌즈(13)의 경사가 상호 반대로 되도록 하여 코마수차를 상쇄시키게 되고, 그러한 코마수차를 보정하기 위해 상기 서스펜션플레이트(24)와 상기 베이스장치(26)의 사이에는 상기 대물렌즈(13)의 트랙킹방향으로 이동시 상기 액츄에이터보빈(22)을 선회시켜 상기 대물렌즈(13)가 상기 디스크(D)에 대해 반대방향으로 위치설정되도록 하는 판스프링 또는 힌지와 같은 탄성수단(25)이 설치된 것이다.The present invention relates to an optical pickup apparatus having a coma aberration-corrected finite optical system, comprising an objective lens 13 and an objective lens 13 for condensing a laser beam emitted from a laser light source 10 on a disk D. Suspension plate 24 to which the actuator 14 which drives biaxially, the wire suspension 21 which floats and supports the actuator bobbin 22 in which the actuator 14 was mounted, and the base apparatus on which the suspension plate 24 are supported ( In the optical pickup device having a finite optical system configured to include a 26) the optical axis of the laser beam by moving the main plane of the objective lens D along a constant circumferential trajectory in the tracking direction of the laser beam with respect to the disk (D) The inclination of the disk D and the objective lens 13 with respect to each other is reversed to offset the coma aberration, and the suspension plate 24 and the A plate for pivoting the actuator bobbin 22 to move the objective lens 13 in the opposite direction with respect to the disk D while moving in the tracking direction of the objective lens 13 between the tooth devices 26. Elastic means 25 such as a spring or hinge is installed.

Description

코마수 차보정형 유한광학계를 갖춘 광픽업장치Optical pickup system with Komasu difference correction finite optical system

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

제3도와 제4도는 본 발명에 따른 유한광학계를 갖춘 광픽업장치에서 코마수차를 보정하기 위한 원리를 설명하는 도면,3 and 4 illustrate a principle for correcting coma aberration in an optical pickup apparatus having a finite optical system according to the present invention;

제5도는 본 발명의 일실시예에 따른 코마수차보정형 유한광학계를 갖춘 광픽업장치의 구조를 설명하는 개략적인 도면.5 is a schematic diagram illustrating a structure of an optical pickup apparatus having a coma aberration-corrected finite optical system according to an embodiment of the present invention.

Claims (3)

레이더광원(10)에서 방사되는 레이저비임을 디스크(D)상에 집광하는 대물렌즈(13)와 그 대물렌즈(13)을 2축 구동하는 액츄에이터(14), 그 액츄에이터(14)가 구성된 액츄에이터보빈(22)을 부유지지하는 와이어 서스펜션(21)이 고착되는 서스펜션플레이트(24) 및 서스펜션플레이트(24)가 지지되는 베이스장치(26)를 구비하여 구성된 유한광학계를 갖춘 광픽업장치에 있어서, 상기 디스크(D)에 대한 레이저비임의 트랙킹방향으로 상기 대물렌즈(D)의 주평면이 일정한 원주궤적을 따라 이동되도록 함으로써 상기 레이저비임의 광축에 대한 디스크(D)와 대물렌즈(13)의 경사가 상호 반대로 되도록 하여 코마수차를 상쇄시키게 된 것을 특징으로 하는 코마수차보정형 유한광학계를 갖춘 광픽업장치.An actuator bobbin comprising an objective lens 13 for condensing a laser beam radiated from the radar light source 10 on a disk D, an actuator 14 for driving the objective lens 13 biaxially, and an actuator 14 thereof. An optical pickup apparatus having a finite optical system comprising a suspension plate 24 on which a wire suspension 21 for floating support 22 is fixed, and a base device 26 on which the suspension plate 24 is supported. The inclination of the disk D and the objective lens 13 with respect to the optical axis of the laser beam is caused by moving the main plane of the objective lens D along a constant circumferential trajectory in the tracking direction of the laser beam with respect to (D). An optical pickup device having a coma aberration-corrected finite optical system, characterized in that to offset the coma aberration. 제1항에 있어서, 상기 서스펜션플레이트(24)와 상기 베이스장치(26)의 사이에는 상기 대물렌즈(13)의 트랙킹방향으로 이동시 상기 액츄에이터보빈(22)을 선회시켜 상기 대물렌즈(13)가 상기 디스크(D)에 대해 반대 방향 또는 실제의 광축과 대물렌즈의 경사량이 작아지게 위치설정되도록 하는 탄성수단(25)이 설치된 것을 특징으로 하는 코마수차보정형 유한광학계를 갖춘 광픽업장치.According to claim 1, Between the suspension plate 24 and the base device 26, when moving in the tracking direction of the objective lens 13, the actuator bobbin 22 is rotated so that the objective lens 13 is An optical pickup apparatus having a coma aberration-corrected finite optical system, characterized in that an elastic means (25) is installed so as to be positioned in a direction opposite to the disk (D) or the actual inclination of the optical axis and the objective lens is reduced. 제2항에 있어서, 상기 탄성수단(25)은 상기 대물렌즈(13)의 트랙킹방향으로의 이동시 상기 액츄에이터보빈(22)이 그 트랙킹방향으로 선회되도록 하는 판스프링 또는 힌지로 구성된 것을 특징으로 하는 코마수차보정형 유한광학계를 갖춘 광픽업장치.The coma as claimed in claim 2, wherein the elastic means (25) comprises a comb spring or a hinge configured to cause the actuator bobbin 22 to pivot in the tracking direction when the objective lens 13 moves in the tracking direction. Optical pickup device with aberration correction finite optical system. ※참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: It is to be disclosed based on the initial application.
KR1019940022216A 1994-09-05 1994-09-05 Optical pick-up having finite optical system of comma aberration structure KR0126423B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940022216A KR0126423B1 (en) 1994-09-05 1994-09-05 Optical pick-up having finite optical system of comma aberration structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019940022216A KR0126423B1 (en) 1994-09-05 1994-09-05 Optical pick-up having finite optical system of comma aberration structure

Publications (2)

Publication Number Publication Date
KR960011878A true KR960011878A (en) 1996-04-20
KR0126423B1 KR0126423B1 (en) 1997-12-29

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KR1019940022216A KR0126423B1 (en) 1994-09-05 1994-09-05 Optical pick-up having finite optical system of comma aberration structure

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KR0126423B1 (en) 1997-12-29

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