KR970071551A - Optical pick-up device - Google Patents

Optical pick-up device Download PDF

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Publication number
KR970071551A
KR970071551A KR1019960013001A KR19960013001A KR970071551A KR 970071551 A KR970071551 A KR 970071551A KR 1019960013001 A KR1019960013001 A KR 1019960013001A KR 19960013001 A KR19960013001 A KR 19960013001A KR 970071551 A KR970071551 A KR 970071551A
Authority
KR
South Korea
Prior art keywords
disk
laser
prism
laser diodes
light transmitting
Prior art date
Application number
KR1019960013001A
Other languages
Korean (ko)
Other versions
KR0174474B1 (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.)
Filing date
Publication date
Application filed by 배순훈, 대우전자 주식회사 filed Critical 배순훈
Priority to KR1019960013001A priority Critical patent/KR0174474B1/en
Priority to JP9109800A priority patent/JPH1055566A/en
Priority to GB9708507A priority patent/GB2312548A/en
Priority to US08/847,475 priority patent/US5940360A/en
Priority to CN97113095A priority patent/CN1167975A/en
Publication of KR970071551A publication Critical patent/KR970071551A/en
Application granted granted Critical
Publication of KR0174474B1 publication Critical patent/KR0174474B1/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
    • G11B7/1395—Beam splitters or combiners
    • 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
    • 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
    • G11B7/1365—Separate or integrated refractive elements, e.g. wave plates
    • 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
    • G11B2007/0003—Recording, reproducing or erasing systems characterised by the structure or type of the carrier
    • G11B2007/0006—Recording, reproducing or erasing systems characterised by the structure or type of the carrier adapted for scanning different types of carrier, e.g. CD & DVD

Abstract

본 발명은 광학 데이타기록 매체에 신호를 기록하고, 그 기록된 정보를 전기신호로 재생시키는 광 픽-업 장치에 관한 것으로서, 특히 일반적 음악 재생용 디지탈 오디오 디스크(DAD)와 영상재생용 디지탈 비디오 디스크(DVD)를 동시에 재생할 수 있도록 하는 광 픽-업 장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates generally to an optical pick-up apparatus for recording a signal on an optical data recording medium and for reproducing the recorded information as an electric signal, (DVD) can be played back at the same time.

이를 위하여 서로 다른 파장으로 레이저빔을 방사하는 2개의 레이저 다이오드를 사용하고, 상기 레이저 다이오드의 방사빔과 디스크를 통해 돌아오는 광정보 빔을 빔 스플리트로서 반사 및 투과시켜 빔 경로를 형성하는 한편, 상기 빔 스플리트와 상기 레이저 다이오드 사이에는 특정 파장만을 투과하고, 그 이외의 파장은 반사시켜 디스크상에 크기가 서로 다른 2종류의 빔 포커스를 형성 할 수 있는 특정파장 투광판을 구비함으로서 각파장의 레이저빔이 상기 특정파장 투광판을 경유할 경우 직경이 1.6㎛와 0.8㎛의 빔 포커스가 동시에 형성되도록 하여 디지탈 오디오 디스크는 물론, 상기 오디오 디스크 보다 데이타 기록 용량이 수배 많아 피트의 폭이현저히 좁은 디지탈 오디오 디스크의 재생이 가능하도록 하여 광 픽-업 장치의 신뢰성 향상에 기여할 수 있도록 한 것이다.For this purpose, two laser diodes for emitting laser beams of different wavelengths are used, and a beam path is formed by reflecting and transmitting the radiation beam of the laser diode and the optical information beam returning through the disk as beam splits, And a specific wavelength light transmitting plate that transmits only a specific wavelength between the beam splitter and the laser diode and reflects the other wavelengths to form two kinds of beam focuses having different sizes on the disk. When a laser beam passes through the specific wavelength light transmitting plate, a beam focus with diameters of 1.6 mu m and 0.8 mu m is formed at the same time, so that a digital recording medium having a data recording capacity of several times larger than that of the audio disk, It is possible to reproduce the audio disc, thereby contributing to the improvement of the reliability of the optical pick-up apparatus .

Description

광 픽-업 장치Optical pick-up device

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

제2도는 본 발명에 따른 광 픽-업 장치의 구성도.FIG. 2 is a configuration diagram of an optical pick-up apparatus according to the present invention; FIG.

Claims (1)

광학 데이타기록 매체인 디스크에 신호를 기록하고, 그 기록된 정보를 전기신호로 재생시키는 광 픽-업 장치에 있어서, 각각 서로 다른 제1 및 제2파장(λ1)(λ2)의 레이저빔을 방사하며 서로 대향되도록 소정간격을 두고 배치된 제1 및 제2레이저 다이오드(30)(40), 상기 제1 및 제2레이저 다이오드(30)(40)의 중간에 배치되어 입사빔을 투과시키는 프리즘(60), 상기 프리즘(60)의 중앙부를 중심으로 대각선 방향으로 대칭되게 형성되어 상기 제1 및 제2레이저 다이오드(30)(40)로부터 방사되는 레이저빔을 일정한 비율로 반사 및 투과시키는 제1 및 제2빔 스플리트 (61)(62), 상기 프리즘(60)의 상측에 소정간격을 두고 배치되고 제1 및 제2파장 투광부(58)(59)로 형성되어 특정 파장만을 투과하고, 그 이외의 파장은 반사시켜 디스크상에 크기가 서로 다른 두개 이상의 빔 포커스를 형성하는 특정파장 투광판(50), 상기 특정파장 투광판(50)의 상측에 설치되어 서로 다른 각으로 빔을 집속하여 디스크상에 두 개이상의 빔 포커스를 형성하는 대물렌즈(70), 상기 프리즘(60)의 하측에 소정간격을 두고 설치되어 디스크를 통해 돌아오는 광정보를 전기적신호로 변환하여 출력하는 광검출기(20)로 구성된 것을 특징으로 하는 광 픽-업 장치.1. An optical pick-up apparatus for recording a signal on a disc, which is an optical data recording medium, and reproducing the recorded information by an electric signal, characterized by comprising: a first step of irradiating a laser beam of a first and a second wavelength lambda 1 A first and a second laser diodes 30 and 40 disposed at predetermined intervals so as to face each other and a prism 30 disposed between the first and second laser diodes 30 and 40 to transmit an incident beam The first and second laser diodes 30 and 40 are formed symmetrically with respect to a central portion of the prism 60 in a diagonal direction to reflect and transmit the laser beam emitted from the first and second laser diodes 30 and 40 at a predetermined ratio. A second beam splitter 61 and 62 are disposed on the upper side of the prism 60 with a predetermined distance therebetween and are formed of first and second wavelength light transmitting parts 58 and 59 to transmit only specific wavelengths, The other wavelengths are reflected to form two or more beams having different sizes on the disk An objective lens 70 provided at an upper side of the specific wavelength light transmitting plate 50 to focus the beam at different angles to form two or more beam focuses on the disk, And a photodetector (20) disposed below the prism (60) at a predetermined interval to convert optical information returned through the disk into an electrical signal and output the electrical signal. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: It is disclosed by the contents of the first application.
KR1019960013001A 1996-04-26 1996-04-26 An optical pickup device KR0174474B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
KR1019960013001A KR0174474B1 (en) 1996-04-26 1996-04-26 An optical pickup device
JP9109800A JPH1055566A (en) 1996-04-26 1997-04-25 Optical pickup device
GB9708507A GB2312548A (en) 1996-04-26 1997-04-25 Optical pickup device
US08/847,475 US5940360A (en) 1996-04-26 1997-04-25 Optical pickup device for reproducing discs of two types with different densities by double beam focuses of different sizes
CN97113095A CN1167975A (en) 1996-04-26 1997-04-26 Optical pickup device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019960013001A KR0174474B1 (en) 1996-04-26 1996-04-26 An optical pickup device

Publications (2)

Publication Number Publication Date
KR970071551A true KR970071551A (en) 1997-11-07
KR0174474B1 KR0174474B1 (en) 1999-04-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019960013001A KR0174474B1 (en) 1996-04-26 1996-04-26 An optical pickup device

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KR (1) KR0174474B1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102549436B1 (en) * 2021-04-01 2023-06-30 롭틱스(주) Semiconductor circuit pattern inspection device using reflected light and fluorescence

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KR0174474B1 (en) 1999-04-15

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