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KR970007874A - Optical pickup - Google Patents

Optical pickup Download PDF

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Publication number
KR970007874A
KR970007874A KR1019950022765A KR19950022765A KR970007874A KR 970007874 A KR970007874 A KR 970007874A KR 1019950022765 A KR1019950022765 A KR 1019950022765A KR 19950022765 A KR19950022765 A KR 19950022765A KR 970007874 A KR970007874 A KR 970007874A
Authority
KR
South Korea
Prior art keywords
prism
inclined surface
predetermined
optical pickup
disk
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
KR1019950022765A
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Korean (ko)
Other versions
KR0155089B1 (en
Inventor
최양오
Original Assignee
배순훈
대우전자 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 배순훈, 대우전자 주식회사 filed Critical 배순훈
Priority to KR1019950022765A priority Critical patent/KR0155089B1/en
Publication of KR970007874A publication Critical patent/KR970007874A/en
Application granted granted Critical
Publication of KR0155089B1 publication Critical patent/KR0155089B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • G11B7/1381—Non-lens elements for altering the properties of the beam, e.g. knife edges, slits, filters or stops
    • 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
    • G11B7/13—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
    • G11B7/1359—Single prisms

Landscapes

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

Abstract

본 발명은 콤팩트 디스크 플레이어의 광 픽업장치에 관한 것으로서, 특히 프리즘의 일측에 나이프 에지(Knife edge)의 기능을 갖도록 미러 코팅 처리하여 디스크에 보내어지는 일부의 빔과 디스크에서 반사되어 돌아오는 일부의 빔으로 포커스 에러를 검출토록 함으로서 구성을 간소화한 광 픽업장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical pick-up device of a compact disc player, and in particular, some beams sent to the disc by mirror coating to have a knife edge function on one side of the prism, and some beams reflected from the disc and returned. The present invention relates to an optical pickup device which simplifies the configuration by detecting a focus error.

이를 위하여 레이저 다이오드로부터 발생되는 레이저 빔을 집광하여 디스크상에 포커싱시키는 대물렌즈를 포함한 광 픽업장치에 있어서, 일측면에 소정 경사면이 형성되고, 이 경사면에 형성된 미러 코팅에 의해 광을 반사 및 투과하는 프리즘, 상기 프리즘의 경사면과 소정간격을 두고 설치되어 소정 발진파장을 갖는 레이저빔을 송출하는 레이저 다이오드, 상기 프리즘의 하부 소정위치에 설치되어 디스크의 광정보를 전기적신호로 변환하는 광검출기를 일체로 형성하여 상기 미리 코팅의 나이프 에지 기능에 의해 포커스 에러를 검출토록 한 것이다.To this end, in an optical pickup apparatus including an objective lens for focusing a laser beam generated from a laser diode on a disk, a predetermined inclined surface is formed on one side, and reflects and transmits light by a mirror coating formed on the inclined surface. A prism, a laser diode installed at a predetermined distance from the inclined surface of the prism and transmitting a laser beam having a predetermined oscillation wavelength, and a photodetector installed at a lower predetermined position of the prism to convert optical information of the disk into an electrical signal. To detect the focus error by the knife edge function of the coating in advance.

Description

광 픽업장치Optical pickup

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

제2도는 본 발명에 광 픽업장치의 구성도.2 is a block diagram of an optical pickup device according to the present invention.

Claims (1)

레이저 다이오드(51)로부터 발생되는 레이저 빔을 집광하여 디스크(55)상에 포커싱시키는 대물렌즈(54)를 포함한 광 픽업장치에 있어서, 일측면에 소정 경사면(72)이 형성되고 이 경사면(72)에 형성된 미러 코팅(73)에 의해 광을 반사 및 투과하는 프리즘(71), 상기 프리즘(71)의 경사면(72)과 소정간격을 두고 설치되어 소정 발진파장을 갖는 레이저 빔을 송출하는 레이저 다이오드(51), 상기 프리즘(71)의 하부 소정위치에 설치되어 디스크(55)의 광정보를 전기적신호로 변환하는 광검출기(56)을 일체로 형성하여 상기 미리 코팅(73)의 나이프 에지 기능에 의해 포커스 에러를 검출토록 한 것을 특징으로 하는 광 픽업장치.In the optical pickup apparatus including the objective lens 54 for focusing the laser beam generated from the laser diode 51 and focusing on the disk 55, a predetermined inclined surface 72 is formed on one side thereof, and the inclined surface 72 is formed. A prism 71 that reflects and transmits light by the mirror coating 73 formed thereon, and a laser diode that is installed at a predetermined distance from the inclined surface 72 of the prism 71 to transmit a laser beam having a predetermined oscillation wavelength ( 51), a photo detector 56 which is installed at a predetermined lower portion of the prism 71 and converts the optical information of the disk 55 into an electrical signal is integrally formed, so that the knife edge function of the coating 73 is performed in advance. An optical pickup apparatus characterized by detecting a focus error. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950022765A 1995-07-28 1995-07-28 Optical pick-up system using knife edge Expired - Fee Related KR0155089B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950022765A KR0155089B1 (en) 1995-07-28 1995-07-28 Optical pick-up system using knife edge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950022765A KR0155089B1 (en) 1995-07-28 1995-07-28 Optical pick-up system using knife edge

Publications (2)

Publication Number Publication Date
KR970007874A true KR970007874A (en) 1997-02-21
KR0155089B1 KR0155089B1 (en) 1998-12-15

Family

ID=19421960

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019950022765A Expired - Fee Related KR0155089B1 (en) 1995-07-28 1995-07-28 Optical pick-up system using knife edge

Country Status (1)

Country Link
KR (1) KR0155089B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8704581B2 (en) 2007-04-23 2014-04-22 Qualcomm Incorporated Switched capacitor integration and summing circuits
US8779957B2 (en) 2012-08-02 2014-07-15 Qualcomm Incorporated Low distortion feed-forward delta-sigma modulator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8704581B2 (en) 2007-04-23 2014-04-22 Qualcomm Incorporated Switched capacitor integration and summing circuits
US8779957B2 (en) 2012-08-02 2014-07-15 Qualcomm Incorporated Low distortion feed-forward delta-sigma modulator

Also Published As

Publication number Publication date
KR0155089B1 (en) 1998-12-15

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