KR960042560A - Optical pickup device for compact disc player - Google Patents

Optical pickup device for compact disc player Download PDF

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Publication number
KR960042560A
KR960042560A KR1019950014151A KR19950014151A KR960042560A KR 960042560 A KR960042560 A KR 960042560A KR 1019950014151 A KR1019950014151 A KR 1019950014151A KR 19950014151 A KR19950014151 A KR 19950014151A KR 960042560 A KR960042560 A KR 960042560A
Authority
KR
South Korea
Prior art keywords
prism
silicon substrate
compact disc
laser diode
disc player
Prior art date
Application number
KR1019950014151A
Other languages
Korean (ko)
Other versions
KR0137247B1 (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 KR1019950014151A priority Critical patent/KR0137247B1/en
Priority to US08/655,445 priority patent/US5787058A/en
Priority to EP96303892A priority patent/EP0749119A3/en
Priority to CN96108468A priority patent/CN1146593A/en
Priority to JP8138297A priority patent/JPH0927142A/en
Publication of KR960042560A publication Critical patent/KR960042560A/en
Application granted granted Critical
Publication of KR0137247B1 publication Critical patent/KR0137247B1/en
Priority to US09/110,950 priority patent/US5953294A/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
    • G11B7/13—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
    • G11B2007/13722—Fresnel lenses

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)

Abstract

본 발명은 콤팩트 디스크 플레이어의 광 픽업장치에 관한 것으로서, 특히 회절격자를 통한 0차, ±1차광(3 beam)과 프리즘에 소정의 굴절율을 갖는 마이크로 프레넬렌즈(Micro Fresnel Lens)에 의한 비점수차법을 이용함으로서 디스크의 불안정한 안치상태의 단점을 보완할 수 있도록 한 콤팩트 디스크 플레이어의 광 픽업장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical pickup device of a compact disc player, and in particular, astigmatism caused by a micro Fresnel lens having a predetermined refractive index in the 0th order, ± 1st order light (3 beam) through a diffraction grating, and a prism. The present invention relates to an optical pickup device for a compact disc player that can compensate for the disadvantages of an unstable settled state of a disc by using a method.

이를 위하여 소정형상의 크기를 갖는 제 1 실리콘기판일측에 형성된 제 2 실리콘기판의 상부에 설치되어 레이저 빔을 발생하는 레이저 다이오드, 임의의 경사면을 갖고 상기 레이저 다이오드와 소정 간격을 두고 설치되어 레이저 빔을 반사시키는 프리즘을 구비하여 디스크상의 정보를 읽는 콤팩트 디스크 플레이어의 광 픽업장치에 있어서, 상기 프리즘과 레이저다이오드 사이에 설치되어 0차광, ±1차광의 3빔을 발생하는 회절격자, 상기 제 1 실리콘기판의 소정 위치에 형성되어 디스크상에 기록된 광 정보를 이용해 비점수차를 발생시키는 마이크로 프레넬렌즈, 상기 프리즘의 상부에 설치되어 마이크로 프레넬렌즈를 통한 광 정보를 전기적신호로 변환하는 광 검출기를 포함하여 이루어진 것이다.To this end, a laser diode is installed on an upper side of a second silicon substrate formed on one side of the first silicon substrate having a predetermined shape to generate a laser beam, and has a predetermined inclination surface and is installed at a predetermined distance from the laser diode. An optical pick-up device of a compact disc player having a prism to reflect information on a disc, comprising: a diffraction grating disposed between the prism and the laser diode to generate three beams of zero order light and ± 1 order light, and the first silicon substrate A micro Fresnel lens formed at a predetermined position of the to generate astigmatism by using the optical information recorded on the disk, and installed on top of the prism includes a photo detector for converting the optical information through the micro Fresnel lens into an electrical signal It is done by.

Description

콤팩트 디스크 플레이어의 광 픽업장치Optical pickup device for compact disc player

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

제 2 도는 본 발명에 따른 콤팩트 디스크 플레이어의 광 픽업장치의 구성도.2 is a block diagram of an optical pickup device for a compact disc player according to the present invention.

Claims (1)

소정형상의 크기를 갖는 제1실리콘기판(4)일측에 형성된 제2실리콘기판(4a)의 상부에 설치되어 레이저빔을 발생하는 레이저 다이오드(1), 임의의 경사면을 갖고 상기 레이저 다이오드(1)와 소정 간격을 두고 설치되어 레이저빔을 반사시키는 프리즘(2)을 구비하여 디스크(6)상의 정보를 읽는 콤팩트 디스크 플레이어의 광 픽업장치에 있어서, 상기 프리즘(2)과 레이저 다이오드(1) 사이에 설치되어 0차광, ±1차광의 3빔을 발생하는 회절격자(7), 상기 제1실리콘기판(4)의 소정 위치에 형성되어 디스크상에 기록된 광 정보를 이용해 비점수차를 발생시키는 마이크로 프레넬렌즈(8), 상기 프리즘(2)의 상부에 설치되어 마이크로 프레넬렌즈(8)를 통한 광 정보를 전기적신호로 변환하는 광 검출기(3)를 포함하여 이루어진 것이다.A laser diode (1) installed on an upper portion of the second silicon substrate (4a) formed on one side of the first silicon substrate (4) having a predetermined shape and generating a laser beam, the laser diode (1) having an inclined surface And an optical pick-up device of a compact disc player having a prism (2) arranged at predetermined intervals to reflect a laser beam to read information on the disc (6), between the prism (2) and the laser diode (1). A microfragment provided at a predetermined position of the diffraction grating 7 and the first silicon substrate 4 to generate three beams of zero-order light and ± -first order light, and to generate astigmatism using optical information recorded on the disk. And an optical detector 3 installed above the Nel lens 8 and the prism 2 to convert the optical information through the micro Fresnel lens 8 into an electrical signal. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950014151A 1995-05-31 1995-05-31 Optical pick-up device of cdp KR0137247B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
KR1019950014151A KR0137247B1 (en) 1995-05-31 1995-05-31 Optical pick-up device of cdp
US08/655,445 US5787058A (en) 1995-05-31 1996-05-30 Optical pickup apparatus utilizing a polygonal prism
EP96303892A EP0749119A3 (en) 1995-05-31 1996-05-30 Optical pickup apparatus
CN96108468A CN1146593A (en) 1995-05-31 1996-05-31 Optical pick-up device
JP8138297A JPH0927142A (en) 1995-05-31 1996-05-31 Optical pickup device
US09/110,950 US5953294A (en) 1995-05-31 1998-07-07 Optical pickup apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950014151A KR0137247B1 (en) 1995-05-31 1995-05-31 Optical pick-up device of cdp

Publications (2)

Publication Number Publication Date
KR960042560A true KR960042560A (en) 1996-12-21
KR0137247B1 KR0137247B1 (en) 1998-05-15

Family

ID=19416086

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019950014151A KR0137247B1 (en) 1995-05-31 1995-05-31 Optical pick-up device of cdp

Country Status (1)

Country Link
KR (1) KR0137247B1 (en)

Also Published As

Publication number Publication date
KR0137247B1 (en) 1998-05-15

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