KR970076564A - Optical pick-up device - Google Patents

Optical pick-up device Download PDF

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Publication number
KR970076564A
KR970076564A KR1019960019123A KR19960019123A KR970076564A KR 970076564 A KR970076564 A KR 970076564A KR 1019960019123 A KR1019960019123 A KR 1019960019123A KR 19960019123 A KR19960019123 A KR 19960019123A KR 970076564 A KR970076564 A KR 970076564A
Authority
KR
South Korea
Prior art keywords
laser beam
disk
silicon substrate
wavelength
disc
Prior art date
Application number
KR1019960019123A
Other languages
Korean (ko)
Other versions
KR0175814B1 (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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Application filed by 배순훈, 대우전자 주식회사 filed Critical 배순훈
Priority to KR1019960019123A priority Critical patent/KR0175814B1/en
Publication of KR970076564A publication Critical patent/KR970076564A/en
Application granted granted Critical
Publication of KR0175814B1 publication Critical patent/KR0175814B1/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
    • G11B7/125—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
    • G11B7/1275—Two or more lasers having different wavelengths
    • 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
    • G11B7/1353—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
    • G11B7/135—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
    • 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)

Abstract

본 발명은 광학 데이타기록매체에 신호를 기록하고, 그 기록된 정보를 전기신호로 재생시키는 광 픽-업장치에 관한 것으로서, 특히 일반적 음악재생용 디지탈 오디오 디스크(DAD)와 영상 및 음성 재생용 디지탈 비디오 디스크(DVD)를 동시에 재생할 수 있도록 하는 광 픽-업장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an optical pick-up apparatus for recording a signal on an optical data recording medium and reproducing the recorded information as an electric signal. In particular, a digital audio disc (DAD) for general music reproduction and digital for image and audio reproduction are provided. An optical pick-up device for simultaneously playing a video disc (DVD).

이를 위하여 실리콘기판에 서로다른 두개의 파장을 방사하는 2파장 레이저다이도드, 레이저빔을 일정 비율로 반사 및 투과하는 회절격자 및 빔스플리트, 그리고 특정파장의 레이점빔 만을 선택적으로 투과하고, 그 이외 파장의 레이저 빔은 반사시켜 디스크상에 스토트 사이즈를 조절할 수 있는 선택적 빔 투광부, 디스크를 통해 돌아오는 광정보를 회절시켜 광검출기로 조사하는 홀로그램격자를 집적형성하여 특정파장의 레이저빔이 상기 선택적 빔 투광부를 경유할 경우 디스크상에 직경이 1.6㎛와 0.8㎛의 빔 포커스가 동시에 형성되도록하여 디지탈 오디오 디스크는 물론, 사이 오디오 디스크 보다 데이타 기록 용량이 수배 많아 피트의 폭이 현저히 좁은 디지탈 오디오 디스크의 재생이 가능토록 한 것이다.To this end, a two-wavelength laser diode emitting two different wavelengths on a silicon substrate, a diffraction grating and a beam split reflecting and transmitting a laser beam at a constant rate, and selectively passing only a ray beam of a specific wavelength, and other wavelengths The laser beam of the laser beam reflects the selective beam projection to adjust the size of the streak on the disk, diffracted optical information returning through the disk to form a hologram grating irradiated with a photodetector laser beam of a specific wavelength is the selective beam When via the light-transmitting section, beam diameters of 1.6 μm and 0.8 μm are simultaneously formed on the disc, thereby reproducing not only digital audio discs but also digital audio discs having a significantly narrower pit width because the data recording capacity is many times higher than the inter audio disc. This is possible.

Description

광 픽-업장치Optical pick-up device

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

제2도는 본 발명에 따른 광 픽-업장치의 구성도.2 is a block diagram of an optical pick-up apparatus according to the present invention.

Claims (1)

레이저빔을 대물렌즈로서 빔을 집광하여 디스크상에 신호를 기록하고, 그 기록된 정보를 전기신호로 재생시키는 광 픽-업장치에 있어서, 다수의 광학소자가 안치되는 실리콘기판(60), 상기 실리콘기판(60)의 일측 내부에 형성되어 파장이 서로 다른제1 및 제2파장 (λ1)(λ2)의 빔을 방사하는 2파장 레이저다이오드(63) 상기 실리콘기판(60)의 타측 상부에 형성된 지지체(61), 상기 지지체(61) 내부 소정위치에 형성되어 디스크의 광정보를 검출하는 광검출기(62) 상기 2파장 레이저다이오드(63)가 형성된 실리콘기판(60)의 상부에 소정크기로 형성되어 레이저빔을 투과하는 프리즘(66), 상기 프리즘(66)중앙부에 대각선 방향으로 형성되어 입사빔을 소정의 비율로 투과 및 반사시키는 빔스플리트(65), 상기 프리즘(66)의 일측면에 형성되어 디스크(55)에서 반사되어 돌아오는 광정보를 회절시켜 광검출기(62)로 조사하는 홀로그램격자(65), 상기 프리즘(66)의 상면에 형성되어 특정파장의 레이저빔만을 선택적으로 투과하고, 그 이외 파장의 레이저 빔은 반사시켜 디스크(55)상에 스포트 사이즈를 조절할 수 있는 선택적 빔 투광부(70)로 이루어진 것을 특징으로 하는 광 픽-업장치.An optical pick-up apparatus for focusing a beam using a laser beam as an objective lens, recording a signal on a disk, and reproducing the recorded information as an electrical signal, comprising: a silicon substrate 60 having a plurality of optical elements placed therein; A two-wavelength laser diode 63 formed inside one side of the silicon substrate 60 to emit beams of the first and second wavelengths λ1 and λ2 having different wavelengths, and is formed on the other side of the silicon substrate 60. The support 61 and the photodetector 62 formed at a predetermined position inside the support 61 to detect optical information of the disk are formed on the upper portion of the silicon substrate 60 on which the two-wavelength laser diode 63 is formed. And a prism 66 for transmitting a laser beam, a beam split 65 for forming a diagonal portion at the center of the prism 66 to transmit and reflect an incident beam at a predetermined ratio, and one side of the prism 66. And reflected off the disk 55 Is formed on the upper surface of the hologram lattice 65 and the prism 66 for diffracting the light information to the photodetector 62, and selectively transmits only a laser beam having a specific wavelength, and reflects a laser beam having a wavelength other than that. An optical pick-up device, characterized in that it consists of an optional beam projector (70) capable of adjusting the spot size on the disk (55). ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019960019123A 1996-05-31 1996-05-31 An optical pick-up device KR0175814B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019960019123A KR0175814B1 (en) 1996-05-31 1996-05-31 An optical pick-up device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019960019123A KR0175814B1 (en) 1996-05-31 1996-05-31 An optical pick-up device

Publications (2)

Publication Number Publication Date
KR970076564A true KR970076564A (en) 1997-12-12
KR0175814B1 KR0175814B1 (en) 1999-04-15

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ID=19460373

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019960019123A KR0175814B1 (en) 1996-05-31 1996-05-31 An optical pick-up device

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Publication number Publication date
KR0175814B1 (en) 1999-04-15

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