KR970050396A - Optical pickup device - Google Patents

Optical pickup device Download PDF

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Publication number
KR970050396A
KR970050396A KR1019950068676A KR19950068676A KR970050396A KR 970050396 A KR970050396 A KR 970050396A KR 1019950068676 A KR1019950068676 A KR 1019950068676A KR 19950068676 A KR19950068676 A KR 19950068676A KR 970050396 A KR970050396 A KR 970050396A
Authority
KR
South Korea
Prior art keywords
split prism
focusing
optical pick
detection sensitivity
tracking signal
Prior art date
Application number
KR1019950068676A
Other languages
Korean (ko)
Other versions
KR0186153B1 (en
Inventor
조원형
Original Assignee
구자홍
Lg 전자주식회사
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 구자홍, Lg 전자주식회사 filed Critical 구자홍
Priority to KR1019950068676A priority Critical patent/KR0186153B1/en
Publication of KR970050396A publication Critical patent/KR970050396A/en
Application granted granted Critical
Publication of KR0186153B1 publication Critical patent/KR0186153B1/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
    • G11B7/1356—Double or multiple prisms, i.e. having two or more prisms in cooperation
    • 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

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

Abstract

본 발명은 광픽-업장치에 관한 것으로 광디스크(D)에서 반사되고 빔분리기 (2)를 통해 편향되어 입사되는 광(B)을 반원씩 비껴가게 하는 스프리트프리즘(10)과, 상기 스프리트프리즘(10)을 통과한 광(B)을 수광하여 포커싱신호 및 트랙킹샌호를 검출하는 광검출기(5)를 포함ㄴ하여 구성되어 포커싱 및 트랙킹 신호 검출감도를 높여준 것이다, 이와 같은 본 발명에 의하면 포커싱 및 트랙킹신호 검출감도가 높아져 고속화, 고밀도화되어가는 광픽-업장치의 개발추세에 부합된다.The present invention relates to an optical pick-up apparatus, which includes a split prism (10) and a split prism (10) for reflecting light (B) reflected by an optical disc (D) and deflected through a beam splitter (2) by a half circle. It includes a photo detector (5) for receiving the light (B) that has passed through and detects the focusing signal and the tracking sandwich, thereby improving the detection sensitivity of the focusing and tracking signal, according to the present invention the focusing and tracking signal The detection sensitivity is increased to meet the trend of developing optical pick-up devices that are increasing in speed and density.

Description

광픽-업장치Optical pick-up device

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

제3도는 본 발명에 의한 광픽-업장치의 신호검출을 위한 스프리트프리즘의 형상을 도시한 사시도,3 is a perspective view showing the shape of the split prism for signal detection of the optical pickup apparatus according to the present invention,

제4도의 (가)(나)(다)는 본발명에 의한 광픽-업장치의 포커스에러신호검출상태를 도시한 도면으로, (가)는 광디스크에 정확하게 촛점이 맞아진 상태를 도시한 도면,(나)는 광디스크와 대물렌즈사이의 멀어 초점이 맞짚 안하은 상태를 도시한 도면 (다)는 광디스크와 대물렌즈사이의 거리가 가까워 초점이 맞지 않은 상태를 도시한 도면.(A) (b) (c) of FIG. 4 is a view showing a focus error signal detection state of the optical pickup apparatus according to the present invention, (a) is a view showing a state that the focus accurately on the optical disk, (B) shows a state in which the optical disc and the objective lens are not in focus, and (C) shows a state in which the optical disc and the objective lens are not in close focus.

Claims (2)

광디스크에서 반사되고 빔분리그를 통해 편향되어 입사되는 광을 반원씩 비껴가게 하는 스프리트프리즘과, 상기 스프리트프리즘을 통과한 광을 수광하여 포커싱신호 및 트랙킹신호를 검출하는 광검출기를 포함하여 구성되어 포커싱 및 트랙킹신호검출감도를 높인 것을 특징으로 하는 광픽-업장치.A split prism for reflecting light reflected from the optical disk and deflected through the beam splitter to semi-circle, and a photodetector for receiving the light passing through the split prism and detecting a focusing signal and a tracking signal. An optical pick-up device, characterized in that the tracking signal detection sensitivity is increased. 제1항에 있어서, 상기 스프리트프리즘은 동일경사의 경사면을 가진 프리즘을 서로 대향되는 방향으로 배치하여 형성됨을 특징으로 하는 광픽-업장치.The optical pick-up device according to claim 1, wherein the split prism is formed by arranging prisms having inclined surfaces of the same inclination in opposite directions. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950068676A 1995-12-30 1995-12-30 An optical pickup device KR0186153B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950068676A KR0186153B1 (en) 1995-12-30 1995-12-30 An optical pickup device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950068676A KR0186153B1 (en) 1995-12-30 1995-12-30 An optical pickup device

Publications (2)

Publication Number Publication Date
KR970050396A true KR970050396A (en) 1997-07-29
KR0186153B1 KR0186153B1 (en) 1999-04-15

Family

ID=19448183

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019950068676A KR0186153B1 (en) 1995-12-30 1995-12-30 An optical pickup device

Country Status (1)

Country Link
KR (1) KR0186153B1 (en)

Also Published As

Publication number Publication date
KR0186153B1 (en) 1999-04-15

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